RC India

Hi everyone,
In these days of FPV quads, many members may never have seen a 'Chuck' glider.
Or a rubber powered model.
For 'Chuck Gliders' I've already started a thread.
Time for a new thread on 'Rubber Power'
The problem with rubber power is lack of rubber and lack of props.
With the help of veterans, we'll try to tackle that

I request Saikat sir and Glidiator sir to post a few pics, so that members get an idea of what we are talking about!

I'll start with pics of my Pilatus Porter and Druine Turbulent

Welcome to Free Flight Rubber. I think Glidiator is ready to start you off with a Bobni!

Regards

Yes KK. Is a good idea to have seperate threads for different categories. This is the age of super specialisations. One can delve very deep into each category and still be actually only scratching the surface.
It is not for nothing that the old greying guys say you need to have your basics in order to scale greater heights. If any Aeromodeller thinks a chuck glider or rubber power is kid stuff, he doesn't know his basics for sure.
In this rubber thread I can give inputs on indoor free flight as that is what I have been doing over the past five years or so when I stumbled onto ultra light rubber powered Aeromodelling.
Will give links on where to get essential tools, rubber, mylar etc.
Will scan and upload the Bobni plan. One can make  prop for this from balsa/ plastic as the nose hub and prop for this are not available I think.
Will get down to making a build log of the Bobni.
Will endeavour to generate interest in indoor free flight rubber Power.
Incidentally if all goes well we will have the Second Indoor Nationals organised by the AMAI sometime end of this year. Will be very satisfying to see large participation and keen competition.
Will post pics and links.
Link of a short flight demo of rubber power I gave at the First Indoor Nationals held in May 2017 at Sonepat Haryana.

https://youtu.be/wo-FXkZw-8g

Anant

Awesome video from Glidiator!
Sir, please tell us about the site. And the event.
Also a few pics of your models...

Got a personal response from Saikat sir too. Requested him for a few of his old pics...

I think I can claim with all humility that The first indoor nationals came to be held due to my constant plugging for  indoor free flight on the AMAI discussion group. Yes the guys in charge of AMAI had the vision to see it's potential in fostering Aeromodelling as a hobby.
The venue was most suitable. It was the indoor facility of the Little Angels School at Sonepat. I was amazed that a school in a small corner had such a venue. in addition to superb facilities for other sports too.
The indoor space was actually 3 badminton courts and the stage retracted into the wall. Huge space. Height was also decent about 30 ft to the lowest obstructions.
It was mid May and scorching outside but the hall was fully AC. But the blowers had to be switched off when I was giving demos of ultra light models. Monsoons or winter is the best time for indoor events as the ambient temperature will be comfortable without AC as blowers cannot be on when flying ultra light indoor stuff.
The school management did excellent coordination and logistics.
This first indoor event was more an awareness campaign than a real competition. Had several workshops and competitions on indoor models for schools. Demos of rubber power, and even indoor RC though the RC stuff was actually outdoor models that were small and slow enough for indoor.
Have a lot of pics of several models I have made. Will have to reduce file size to attach. Will do so. Lot of other stuff to share and will do so as we go along.

Links for resources required for pursuing indoor rubber seriously.

Rubber

https://www.faimodelsupply.com/?s=Rubber

http://www.fly-m.com/mobile%20rubber%20motor%20stock.html

Balsa stripper - different prices and different shipping rates.

https://m.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m4084.l1313.TR2.TRC0.A0.H0.Xmaster+airscrew.TRS0&_nkw=master+airscrew+balsa+stripper

Mylar/rubber/ other Free Flight requirements

https://www.freeflightsupplies.co.uk/index.php


Propellers / nose hubs/ prop shafts etc
http://www.fly-m.com/mobile%20rubber%20motor%20stock.htmlGood for beginners till you are motivated to make your own props and nose hubs

http://ikara.eu

There may be an initial investment in these essentials.
Nothing compared to RC stuff.
Balsa requirement in most indoor rubber power is ridiculously low. Just thin strips. Fuselage is thickest dimension.

All this is also applicable to outdoor free flight / rubber.

Plan for the Double Whammy.
A model that is not too fragile. Has good gliding characteristics -- not difficult to trim.
Can use Ikara readymade prop or other ready made prop also. Scratch building prop is also not difficult.
Was a Indoor Science Olympiad model several years ago. So if school students can make it --should be possible by anyone.

Instead of mylar for wing and stab covering one can use the thinnest grocery bag -- less than 10 micron which though banned in many places is still used. It will add some colour to the model also.
Pic attached shows grocery bag adding color

With respect to sakaits observation that you will need more than tan rubber to get good flights.
An article by a seasoned indoor rubber power Aeromodeller concluded by saying there are
3 most important things when building indoor models
        1) Build it light
         2) Avoid adding weight
          3) Don't make it heavy
Not the exact phrases but the crux is weight, weight and weight.
Also better to have model turn out a bit nose heavy than tail heavy. Nose weight can be removed but tail heavy requires addition of weight to nose Increasing AUW.

In my post regards essential tools and jigs I forgot to add a very important piece of equipment if one is serious about rubber power --- A Torque Meter.
It is not a complicated machine.
Can be made with some scraps of wood, plastic tubing and guitar wire..
Will post plan and pics

Here is some nostalgia-- the first rubber power model for many in the days gone by
The Bobni. Pic of the kit I retrieved form the deep recesses of my Aeromodelling cupboard.
Pic shows the box, the plan, instructions, tissue, balsa bundles for wing, stan, fin, prop and nose hub, undercarriage, two fillets for wing dihedral support.
Will assemble this asap. Plan to use my acquired experience in indoor ultralights and make a modified Bobni with much lower AUW. Will use an Ikara prop and nose ring. Let's see how that works out performance wise

@glidiator,
Seems different from what I remember.
Must be a later version. Any idea which year?

What I'm certain of (about the 1960s kit)
1. There was no taper in the wing tips. The wings were rectangular.
2. No carboard box. Only a polythene pouch

I'm not sure, but I think it had a rectangular fin, not a triangular one, and the span was 12" not 13".
Perhaps Rishi could clarify...

And other old timers may search their memory...

Yes KK. This is a later version. Can't remember the date. Got it approx 15 years ago if my memory serves me right.
Yes the earlier version came in a plastic pouch.
The balsa sticks were also not cut to size-- just a bunch of 8" or so sticks that had to be cut according to plan.
Fin If I remember was triangular.

@KK
Found another BOBNI plan. Shows wings without taper.
This seems to be from an older kit (plastic pouch??)

@KK
Found another BOBNI plan. Shows wings without taper.
This seems to be from an older kit (plastic pouch??)

There was a India's Hobby Center Rubber powered kit.
That was the first ever aircraft I had.
I remember it had a truss style wing and tail construction and the wing was essentially a rectangle with some dihedral. It used to fly for approximately 20-30 seconds.
Does anyone Remember this plane?
IHC Kolkata had many of these hanging on their walls.
It would be so great and nostalgic to build it again.....

Meanwhile,
Why are there no other people posting here other than Iyer Sir and Anant sir?
These are so much better and rewarding!

Possible reasons:
1. No one is interested. Maybe considered low tech, and meant for kids
2. Never seen a chuck, catapult, tip launch glider, or a rubber powered model
3. Never seen one of those actually flying, so no idea of performance potential
4. Difficultly in sourcing small amounts of balsa, near impossibility of getting rubber or props

We have tried to generate interest in entry level aeromodelling, but found
1. No response to Glidiator
2. Over 5000 views, but not a single attempt at my 1 min /30 sec challenge

Note that sanjayrai55's efforts in coro, saw more interest abroad than here

For the last 1-2 years, I tried offering cash prizes.
Glidiator doubled them.
Still no response?

Any suggestions?
Regards

@taksh must not be getting a suitable translation for 'rubber power'



... Just kidding ... !

Saikat?
Who is this?

An Old Master
A sample here
http://www.rcindia.org/kites-trains-free-flight-and-all-others/free-flight-rubber/msg95125/#msg95125

Quote from: prabal276 on July 27, 2018, 08:09:04 PM
There was a India's Hobby Center Rubber powered kit.
That was the first ever aircraft I had.
I remember it had a truss style wing and tail construction and the wing was essentially a rectangle with some dihedral. It used to fly for approximately 20-30 seconds.
Does anyone Remember this plane?
IHC Kolkata had many of these hanging on their walls.
It would be so great and nostalgic to build it again.....

Iyer Sir, Anant sir and Saikat sir;
Do you have any idea of this particular model?

Yes Prabal,
See this
http://www.rcindia.org/kites-trains-free-flight-and-all-others/help-with-original-plans-of-bobni/msg113388/#msg113388

Quote from: K K Iyer on July 27, 2018, 09:08:05 PM
Possible reasons:
1. No one is interested. Maybe considered low tech, and meant for kids
2. Never seen a chuck, catapult, tip launch glider, or a rubber powered model
3. Never seen one of those actually flying, so no idea of performance potential
4. Difficultly in sourcing small amounts of balsa, near impossibility of getting rubber or props

We have tried to generate interest in entry level aeromodelling, but found
1. No response to Glidiator
2. Over 5000 views, but not a single attempt at my 1 min /30 sec challenge

Note that sanjayrai55's efforts in coro, saw more interest abroad than here

For the last 1-2 years, I tried offering cash prizes.
Glidiator doubled them.
Still no response?

Any suggestions?
Regards

The points you raised may be the reason for lack of interest or response.
But as for availability of rubber and props I don't see any problems nowadays. In my early days of Aeromodelling I did not even know that TAN rubber existed. Now with internet and online purchase facility that is no longer a problem. Even in small quantities.
I have posted links for sourcing  free flight essentials. And they are not actually expensive by today's standards.
The problem may also lie in the fact that HLG, CLG or rubber power are not jazzy or cool. Doesn't have the gizmo effect.
The RTF culture is also destroying the joy of construction.

@Saikat Sir
:o
I know English but not very well  :'( and i know rubber powered plane.
I have rubber band powered plane.
I am busy in making blu baby wings so i am not online and due to rainy season in my area, I am trying to search large ground and dry ground for flying blu baby.
And K K Iyer sir & others said my posts are rude so i am trying to not to say anything.
If you want images of blu baby build then i can show you.   :)

Sorry for hijacking thread.

@taksh
Nice post!
I'm glad you didn't leave this forum.

Start a new thread for your Blu Baby build.
Post photos step by step.
A lot of members will be interested.

If you have a rubber powered model, please post a picture here.
Regards

Pics of the Chaser from IHC. All part of the archeological findings while clearing the Aeromodelling cupboard.

Catapult launch free flight glider with folding wing mechanism.  Wing unfolds at top of the height when air pressure reduces.

Quote from: Dreamliner on August 02, 2018, 08:02:38 PM
Catapult launch free flight glider with folding wing mechanism.  Wing unfolds at top of the height when air pressure reduces.

Which brand is it??.
The wing dihedral seems a lot.

Zoomed the pic and saw the Guillows logo.

@dreamliner,
What's this?
Never seen it before!

Yes, it is a Guillows kit.  Picture taken in folded wing state.  When the wing unfolds, dihedral is approx 5 degrees.

What is it called?? Can look it up in their catalogue.

It is called 54 just the digits "54" as printed on the wing,

@dreamliner
Good to see you active.
Those plastic models would make nice prizes for youngsters...

One more Bobni plan dug out from a long forgotten box. This one was in a pouch.
I have dated this as 06/2009 based on the mfg date on the quick-fix packet that came with it.(Getting good at carbon dating!!)
Interestingly this plan shows added wing tips. No balsa for them, perhaps need to use card paper.
So IHC has been doing some modifications to the original plan as time went by -- tapered wings, rounded wing tips etc.

Wonder why they did not have aerofoil ribs. Would have improved performance significantly I feel. Plan to do that keeping the other dimensions the same. Ofcourse TAN rubber will make a big difference.

I guess as a beginners model it is better to keep things simple while providing decent performance.

Just some duffer who drew this plan.
Forgot tip rib!  ;D

Recd a query from Dreamliner re pros/cons of Monokote vs tissue, especially for small rubber power models of 15" span or less.
Responding here as it may interest a few others too.

The main advantages of Monokote are that it is easy to get a good finish, it is fuel proof, can be cleaned with soap and warm water, is puncture resistant, and lasts for decades.

But it requires the basic structure to be quite strong, like a typical RC wing with sheeted LE, TE, tips and center section. Usually found only in models of say 40" or more span.

Rubber power models usually have only about 10% structure (balsa strips) and 90% open area.
Such structures will buckle when the Monokote is tightened.

As an experiment, you can build, say, two Bobni wings. Cover one with Monokote, the other with tissue. You'll be able to see that tissue is preferable for small, light, open structures...

What is the weight difference between the two.
As far as indoor rubber models are concerned it's all about reducing weight. So material that will add to weight may not be suitable. May be okay for fun flying and where you want a durable model that can take some knocks. For competition weight is critical.

QuoteOne more Bobni plan dug out from a long forgotten box. This one was in a pouch.
I have dated this as 06/2009 based on the mfg date on the quick-fix packet that came with it.(Getting good at carbon dating!!)
Interestingly this plan shows added wing tips. No balsa for them, perhaps need to use card paper.
So IHC has been doing some modifications to the original plan as time went by -- tapered wings, rounded wing tips etc 

This is the one!
Nostalgic!
Can we get a scan of the plans?
Please?

Quote from: Glidiator on August 06, 2018, 03:08:05 PM
What is the weight difference between the two.
As far as indoor rubber models are concerned it's all about reducing weight. So material that will add to weight may not be suitable. May be okay for fun flying and where you want a durable model that can take some knocks. For competition weight is critical.

For small models built mainly of balsa strips (much smaller than 1/4"sq), the Monokote vs tissue issue is not about weight. It's about the shrinking power. Stick constructions will get crunched when you tighten the monokote. The experiment suggested (cover one Bobni wing in Monokote, another in tissue) should reveal this. Incidentally, Monokote will pull off from stick structures during shrinking due to lack of adequate surface for adhesion.
And, though I have no data, I guess Monokote will be 3-4 times as heavy as tissue/dope, partly due to adhesive on the entire surface.
Incidentally, for dope one can use NC Clear Lacquer (Rs 60 for 200ml), diluted with NC Thinner (Rs 50 for 500 ml).

To summarize, Monokote is not recommended for small models and weak open frame structures.

Sure Prabal.
Will scan and upload as a PDF in actual size. Will tile it so can print out on A4 printer.

Have never used monokote so my knowledge of that material is zero.

@prabal276,
A full size plan is hardly needed.
Pic posted by Glidiator is enough, once you know that the span is 13"!

Would suggest using the thinnest grocery bag plastic. Less than 10 microns (banned by many states) It is durable as well as light and can take more knocks than tissue. No need to dope also which will add weight.
But if you want to adhere to the original classic construction then will have to use tissue.

Can adhere the plastic to the balsa using 3M Spray glue or even a thin coat of gluestick

@Glidiator sir,
I have a Miss World wing (54", 0.19 power) whose Monokote (original, not clone) covering has survived for 35 years despite the balsa tips being chewed by rats.
Monokote is FANTASTIC.
Just not meant for small open frame models.

Meanwhile, no one seems to have tried document lamination sheet!
Even I haven't, but I have a sample a friend gave me.
Will try it and report.

On RCG, I found some people using this, and then also covering with tissue. Not sure of the purpose.

So, a lot of scope for experimentation!

If i may, what about using cling wrap? It sticks well to most of the surfaces and is also thin & light weight.

Quote from: Ajay Sarwan on August 06, 2018, 09:12:53 PM
If i may, what about using cling wrap? It sticks well to most of the surfaces and is also thin & light weight.

Worth trying, especially on glidiator's type of models.
What to stick it with? Rubber solution?
Wish I had 3M 77 spray adhesive. Too expensive.

Yes lamination sheet comes in various thickness.
I have a roll that is about 8 microns thick. Have used it on my indoor capacitor powered model. Worked pretty well as I was not aiming to keep weight down. A youngster from Nagpur whom I have been mentoring on indoor free flight used the lamination painstakingly peeled off from the brown paper one uses to cover school books as he did not have access to mylar.
Have tried cling wrap. The problem with it is it tends to stretch as it has a lot of elasticity. So after fixing to wing if you apply pressure on some portion of the surface it will stretch and create a sag at that area. That thin grocery bag is the easiest to procure and suits the requirement. Even the die had indoor flyers on hippocket recommend this when mylar etc is not available and one is not in serious competition.
There is another firm - Sprayway India who have a aerosol spray glue SPRAY66 which is an all purpose spray glue and half the price of 3M. They have been concentrating on B2B business for the textile industry. I got a couple of can two years ago and still using it. Will ascertain retail availability now from their Bengaluru India office.

Pic of Spray 66

Spray 66 uses LPG as propellent so it will not create holes in the ozone layer as will other aerosols!!

To everyone working on indoor rubber freeflight, or thinking about it, I can assure you that this may be the most cerebral and challenging forms of aeromodelling. It requires great understanding of flight principles, skill, dedication and oodles of patience. Most of the "masters" of this esoteric form of flight are at the top of their academic and professional careers. I've been fortunate to attend some of the world class sessions including the World Championships at West Baden Indiana in 2018. I also coach the local middle school and high school kids here for the Science Olympiad rubber power freeflight contest. Will post some pics and videos if others are interested.

Hi ask
Great to hear from a fellow indoor FF enthusiast. Have been advocating this aspect of AEROMODELLING for almost half a decade now especially in our Aeromodelers Association of India group. This finally resulted in a first ever Indoor National event in May 2017. Was more an awareness campaign as I was the only serious contestant— so it was basically a lot of demos and talks on techniques, rubber usage techniques, torque meters, etc, etc.
Link of my demo at this event
https://youtu.be/wo-FXkZw-8g
I have been following the Indoor championships happening in your side of the globe and also the happenings in the Science Olympiad scene. Have been advocating that we should start something on similar lines here in India.
Lot of discussions on SO aspects on the Hippocketaeronautics forum.
I had even made a thrust bearing  suitable for SO weight rubber models using a the opening ring from an soda can.
Can see the discussions on this at this link
http://www.hippocketaeronautics.com/hpa_forum/index.php?topic=20755.0P

Check out some of my rubber powered flight videos on the Foldnation channel on YouTube.

Trying to get about a half a dozen serious indoor free flight enthusiasts so we can have a meaningful indoor event.
The mission to get indoor AEROMODELLING into the consciousness of the Aeromodellers  here continues.
Anant

Hi all,
On the topic of indoor free flight - those interested would be thrilled to know that the worlds largest geodesic dome in terms of height and diameter- that is absolute nirvana for any indoor enthusiast has been recently inaugurated at the Maharashtra Institute of Technology at Pune. Much much larger than the West Baden dome where the last FAI F1 D event was held.
A fellow Aeromodeller in Pune is pursuing the use of this venue for an indoor event.
Let's see where this goes.
https://youtu.be/znkB566ck6U

Anant

@glidiator,
Larger than Navy hangar sites?

KK,
Navy hangers also have good height but have girdersrunning across where you can get your model stuck.
A geodesic dome has no obstructions.So the model can actually hit the roof and nothing will happen.
Anant

Military fighter aircraft are pretty small compared to commercial planes which gave tail fins that reach considerable height off the ground. Their hangars are therefore much larger and have more height than navy or airforce aircraft hangars. Now the airforce has large transport aircraft but I don't know if they have hangars for them.

Hi guys,
Back to doing some construction after a bit of a haitus.
Construction of a house (my sons) blanks out time for most other things.
But today very determinedly got back to basics. Pulled out the Bobbi pouch and got down to building it.
The Bobni of our younger days did not have the luxury of the TAN Super Sport rubber. That was a major limitation in its performance.
Now with that rubber available  and a much better understanding of trimming rubber models would like to see how it flies.
Also plan to make a Bobni with cambered ribs and compare flight performances. With a cambered wing it seems like a scaled down version of the Hangar Rat,
Build pics being reduced in file size to post
Anant

@glidiator,
Full speed ahead please!

Hi guys,
Back to doing some construction after a bit of a haitus.
Construction of a house (my sons) blanks out time for most other things.
But today very determinedly got back to basics. Pulled out the Bobbi pouch and got down to building it.
The Bobni of our younger days did not have the luxury of the TAN Super Sport rubber. That was a major limitation in its performance.
Now with that rubber available  and a much better understanding of trimming rubber models would like to see how it flies.
Also plan to make a Bobni with cambered ribs and compare flight performances. With a cambered wing it seems like a scaled down version of the Hangar Rat,

Quote from: K K Iyer on January 27, 2019, 09:15:43 PM
@glidiator,
Full speed ahead please!

Aim to consciously make time to do some regular construction and flying.

Hi all
Bobni completed.
What should have been done in one hour took 3 days.😔😔.
Growing old and slow??
Some modifications-  used thin grocery bag plastic instead of tissue. Tissue tends to warp the wing especially in the high humidity we have in Goa during monsoon. I aim to keep this model for some time to come so warps have to be catered for.
Drawing room Test flights showed very poor glide ability. And model could not keep in the air well. Suspect wing loading is too much. Larger wing area for the AUW of the model would definitely give better lift performance. Or if much thinner cross section of  balsa sticks is used for frame work should improve performance . But then this is a novice beginners model so needs to be sturdy enough to withstand rough handling.
Adding card elevators improved glide considerably. Model tends to turn left — effect of prop torque??
Used 1/8 " TAN rubber and this seems to provide the right thrust/torque.
Don't forget the plastic prop may not be balanced and the washers between the prop and hub are a bit rusted after all these years in storage. Was akin to resurrecting and old Vespa scooter.
Can still make it give decent duration using the indoor rubber trimming bag of tricks.
Build pics and flight video soon after reducing file size.

Is there a facility to reduce pic file size on this forum as is there in the Hippocketaeronautics forum.??

Sir,
I think a Bobni could be made with flying surfaces from a depron dinner plate...
I know it can be flown with common rubberbands tied together.
Then what's reqd is a fuselage, a prop and a a prop mount..

Let me see if I can make suitable props and prop mounts.
Then we can consider having a Bobni build off!

Regards

Yes Bobni with foam plate wings is feasible.
Fuselage could be two skewer sticks glued together. Would also then get some flat surface area for glueing wings. For Glueing foam one cannot use super glue. May be better to glue  a thin strip of balsa to underside of wing joint that inturn can be super glued to fuselage.
Prop blades from plastic cup— toothpicks for prop spars.
Prop hanger can be made from coke / beer can aluminium sheet.
Must make a prototype.
Regular rubber bands can be used — will take less turns so duration will be limited.

Hi all ff rubber enthusiasts,

Some pics of the Bobni build and model

Grocery bag thin plastic used in place of tissue.

Card elevators seems to have sorted out the glide performance.

Test flight in drawing room encouraging.

Flight in larger indoor space soon

Anant

Some more pics

Card elevators

Anant

Need to add card / balsa wing tips.

These I don't recollect were in the original plan

Anant

Quote from: K K Iyer on February 02, 2019, 09:42:53 PM
Sir,
I think a Bobni could be made with flying surfaces from a depron dinner plate...
I know it can be flown with common rubberbands tied together.
Then what's reqd is a fuselage, a prop and a a prop mount..

Let me see if I can make suitable props and prop mounts.
Then we can consider having a Bobni build off!

Regards

ni and


Talking of the foam bobni. Prop bearing can be made from coke / beer can opening ring.
See this video.
https://www.youtube.com/watch?v=Tm6wVxYUFtI

Will post some more pics of it.
Anant

What was that magic?
More details please.

That KK was a nose bearing made from the ring that one sees on a coke/ beer can for opening.
Snip off just the ring - cut circle in half —. Flatten cut tips— curl carefully around a very thin drill bit — and that gives a very light nose bearing through which prop shaft can be threaded. A small glass bead acts as friction reduction washer. Found that this was lighter than the nose bearing made of aircraft aluminium that is being sold online by an experienced US Indoor Aeromodeller.
Moreover the can ring is not just a flat sheet but a cylinder so the strength is much more for taking the rubber tension
This one I managed to make a split rear end so the prop shaft can be removed for changing props.
Have pics of its construction- will reduce file size and post.
When I posted this on the Hippocketaeronautics forum the indoor guys are quite amazed as no one had thought of this use of a can ring.
INDIAN jugad mindset has its uses!!
Anant

Also since it is a semicircle one can adjust the down thrust angle required for the prop as many indoor models require a few degrees of down thrust to trim well.

KK check out this link of the thread on soda can nose bearing.
I think even non registered guests can access it.
http://www.hippocketaeronautics.com/hpa_forum/index.php?topic=20755.0

Useful to have a Jewellers's nose plier - the one with rounded jaws to do such work.

Some pics to explain what I did to make a nose bearing from a soda can ring

This can be a viable alternative for the nose bearings that are being sold from the US.

Anant

Some more on Soda Can Nose Bearing

Some pics to show weight of the bearing and a comparison of size and weight with nose bearings made of aircraft aluminium I got from the USA that are used in used in F1D , Penny plane and Science Olympiad models.

My bearing compares well with them in terms of size and weight.

Making nose bearings can be a separate topic but since it is used in rubber powered models being on this page is useful and relevant.
Anant

Some more on Soda Can Nose Bearing

Pics showing comparative size

Anant

Saw the details on hippocket. (I'm a member there too ;D)
But I fear this level of work is too fine for my capabilities.
(My daughter used to make books with written content and a stitched spine, the size of a thumbnail!)

I've only recently started on Peanut Scale...

Quote from: K K Iyer on February 07, 2019, 11:41:18 PM
I've only recently started on Peanut Scale...

Must get into scale FF models too. They are time consuming to build and need attention to detail. Some of them can also be difficult to trim to get decent performance. Nevertheless a good finished scale model with authentic colour scheme is a work of art.

Druine Turbulent, Pilatus Porter and 1945 Iambus ...

Congratulations on a wonderful build. They look good! Wish you terrific maiden,if not already.
Cheers,
Free Flight

@Free Flight,
Thanks. But these are not exactly new models...
Regards

Ouch, my bad. Sorry about that Mr. Iyer. Coming back to Free flights after a while. But they sure look good, any flight videos?

Quote from: K K Iyer on February 12, 2019, 12:50:37 AM
Druine Turbulent, Pilatus Porter and 1945 Iambus ...

Like the offbeat designs like Iambus.
Can you post the plan link — on Outerzone??
Check out the offbeat designs / plans of models by Bill Brown on HPA.
I have posted pics of his Yvette rubber power. An ideal model to convert to capacitor power. There is a topic on this in HPA.
My BOBNI awaits full power trials in a suitable space.

Quote from: Free Flight on February 13, 2019, 08:40:00 AM
Ouch, my bad. Sorry about that Mr. Iyer. Coming back to Free flights after a while. But they sure look good, any flight videos?

Look up andiyerlko on youtube (that's my wife).
Some nice videos there, incl a few free flight...
Regards

Thanks. Truly good videos, specially the jet landing not needing any net after all, but always be safe. Also loved your living room rubber powered scale flyer. I do that home too before I can get to the field, cannot resist.

You have a great flying field. Happy for you. A bit envious about that (..just joking). , my RC field is 3 miles away and my FF field is 40 miles away. So I fly FF at the local town soccer field/s. Have to fly at dawn and out by 8 as when kids come in.

Here is my soccer field video.
https://www.youtube.com/watch?v=RVOwPDpGvBI

One does what one can.

http://www.rcindia.org/free-donations-and-sweepstakes/can-small-cash-prizes-encourage-attempts/msg298081/#new

We have a new airfield, but posting that here would divert this thread too far afield...
See "RC Aiport, Indore" thread

Hi all
Back after a bit of an haitus.
Check this link for some useful info on wing design.

http://www.razvanapetrei.com/reasons-behind-the-shape-of-aircraft-wings/

By the way has any one used "Paulownia wood".
It is also very light and very stiff and strong. Heavier than balsa but much stiffer. Ideal for fuselage of catapult gliders and other categories.
Got some sample sheets from a China supplier.
Sheets I got are 1 mm, 2 mm and 3 mm can get other thickness and rods dowels etc.
Used for boats models and architectural models too.

Hi all,

Managed to get back to doing a bit of construction.
This one is a old design. A delta flying wing model called the "Flailing Arrow ".
It is a torqueless and tailless model.
It has two props - front and back and the elevon runs the whole length of the trailing edge.
Have use "Paulownia wood" for all components.
Some pics of the build. Fuselage stick, props and elevons to be added.
Will post better pic of plan.
I think it will be a challenge to trim it for stable flight and get satisfying duration.
Await further updates.
Anant

The pics don't seem to have uploaded properly. Trying again

One pic went thru.
Trying others agsin

What the finished model should look like

Arrow build is looking great. Please kindly share the trimmed out flight video at your convenience. Looking forward to it.
PS: indoor flyer, i am guessing?

Hi
Build getting along well. Prop blades put on cylinder for getting helical curve.
Covering done with very thin grocery bag plastic.
Glide without props — only motor stick with nose weight seems good.
Will post pics
Anant

Yes indoor flyer.

Some pics of the build progress of Flailing Arrow

The Flailing Arrow completed
A bit of jugaad for the prop hubs, used the Ikara prop shaft and hub cylinder, did not have the nose ring so tired it down to motor stick. not too neat but does the job well.
Test flights in drawing room quite encouraging.
Full test flights in indoor space asap.
Some pics
Anant

@glidiator,
Great stuff, sir. Hope it inspires some newbies.
How did you decide the prop pitch?
Regards

Hi Gladiator,

Looking great. Are you going to install the landing gear and perhaps ROG? Or too my drag on the first test bed? Either way wish you the best on your maiden.
i guess too much weight to install your capacitor power plant? Although same capacitor could power both props? Looking forward to your video.

Prop pitch and pitch station given in plan. Pitch 45 deg. Used my pitch guage to set angle.

Yes need to put in the landing gear and tail skid. Installing capacitor power not a bad idea. Maybe be okay for single prop. Two motors may be a bit too heavy for the wing area to give enough lift. Maybe enlarge the size proportionately and two props powered by single cap could work.
The article on this also suggests final trimming flights using ROG as it is a bit awkward to launch properly holding two props.

Plan and article of model attached
Anant

Article file size beyond limit. Will reduce file size and post

Was in Nagpur in 26th May to participate in an indoor event that was mainly held to try and set some good benchmarks in rubber power duration.
I was gradually cranking up the turns in each flight and reached a max of 2 mins 30 secs when a little carelessness caused a damage to the trailing edge spar of the wing. That put an end to further flights. Was hoping to reach atleast 4 mins but that was not to be.
Venue was a huge indoor facility- 12 badminton courts and height about 30 ft. Temperature was 45 degs and A/ or blowers could not be switched on. But was so concentrated on getting the rubber wound and ensuring the trim settings on the model were correct before each flight that Idid not feel the heat.
Video of one of the initial flights

https://youtu.be/dYuSaYF77b4

Sir,
I'll be your shishya.
After I send you my guru dakshina...
Regards

Hi KK
Will be more than happy to share my experience and knowledge of indoor rubber power gained over the years.
If all goes well a major indoor event is planned by AMAI at the end of this year in Pune or Nagpur. Open to all Aeromodellers. Would be happy if more participants join the event. Now is the time to start preparing and getting things ready.
Anant

Super flight sir. :hatsoff:
these models need small detailed attention and lot of patience.

Manoj— see my post on the capacitor power model thread and see what happens when a little detail is missed out.

sir, saw that nose dive also.
summer heat makes glue melt and less sticky.

Not so much heat affecting the tape glue. More because I had used silicon lubricant for my earlier rubber power flights and fingers had traces of silicon which got rubbed on to the wing post so tape was not sticking very well.
That silicon lubricant is very slippery stuff and just a small speck is enough to make things slip.

Hi all,

Its been raining cats and dogs for almost a month so got down to some experimental construction.
First an High aspect Ratio A6 - the restriction in this class of model is that the wing can have a max area of 30 sq inches. So one can basically play around with the aspect ratio. Pics below. Paddle Prop is yet to be added.

The second was a contrast model that has a very low aspect Ratio -- the Lazy Bee. This actually an RC model but has the right parameters for a Walk Along Glider -- basically very close coupled wing and tail plane. Saw a youtube video where he had made it into a slope soarer. So I thought I would scale it down to make a very light Indoor Slope Soarer (aka Walk Along Glider)
The original model was 40 inch wing span. Scaled it down to 20% to make an indoor walk along glider.

Link of the Lazy Bee full size Slope Soarer
https://www.youtube.com/watch?v=qKNalBNQ3gQ

Short test flights in the drawing room seem encouraging. Video of flights in larger indoor space soon.
Pics of these models below
Anant

Planning to get into Slope Soaring. Goa has some ideal locations - high cliffs with vertical drop close to the sea that will give good updraft conditions to keep slope glider in the air well.
Anant

@Glidiator.  What an amazing grace........

A superb show of taming the nature's power.

@Dreamliner. Yes it is the sheer elegance and the fact that all this with no power
- just using the power of the wind. Thats what has motivated me me try it out.
Looks easy but will need some practice to get it right.
Anant

Hi all

Completed high aspect ratio A6 with paddle prop.
Observe the half semi circle prop hub made from the opening ring of the aluminium beer can.
It is actually a tube so very stiff , and very light comparable to the aircraft aluminium nose hubs sold   quite expensively by some in USA for indoor free flight models.
Also one can adjust it for required down thrust, side thrust for trimming easily.
Test flights in Indoor space soon.
Pics follow. Having trouble resizing
Anant

Hi all,
Now on my construction board a yesteryear's model.
A twin prop outdoor rubber powered model.
The Peabody Packet
My first twin prop.
A fairly easy build as it has solid motor sticks and not hollow nacelles.
Is an interesting design. Will have to see how well it flies. Plan and article
being reduced in file size for posting
Anant

Here’s the link to the article and plan of the twin prop Peabody Packet

https://1drv.ms/b/s!AmSJek9jWKPSg-pPALb5ze61Z2zwCQ

https://1drv.ms/b/s!AmSJek9jWKPSg-pO_kZD4SwoLP4DaQ

Hi all,
The twin prop "Peabody Packet" is under construction.
Fuselage yet to be covered and wing glued to it.
Prop booms are held by rubber bands to wing. The inverted V tail is held together at the top vertex by small tabs which are tied tight with a thin string. Not in the plan but have done this so I can dismantle each boom for easy storage. Plan to attach main wing to fuselage also with rubber bands so it can be detached for easy storage and transportation.
Wing, fuselage and tail coverings are all thin grocery bag plastic. Plan says condenser paper or Japanese tissue— but with the kind of humidity in Goa paper will make the surfaces warp.
Pics being reduced for attaching.

Await pics.
Nothing shows in the links you posted earlier today.
Regards

PS: can't find it in Google  ???

@KK
Will reduce file sizes and post again.

Some pics of the model.

Wing attached to boom by rubber band. Inverted V tail held at top vertex by a thread tied to very small tabs. So booms can be dismantled for storage/ transportation.
Plan to make arrangement for attaching wing to fuselage by rubber bands. So everything can be dismantled.
Will reduce plan and article and post asap.
Anant

Pics of model

Seem to be having some problems attaching pics.
Has anyone been able to download or open pics attached.

Attaching pics of the Peabody Packet.

Another attempt to attach pics

Hi all,

Here's a link of an indoor/ outdoor model - Spinboy- designed by an Aeromodelling friend in Pune.
This model is now available as a kit with laser cut parts. Easy to build with clear step by step instructions.
Flies well both indoor and outdoors.
For Those interested I can give his contact details for purchasing the kit.

https://youtu.be/icseihzOodM

A few other models constructed await test flights. Will post them asap.
Anant

Can increase the duration of the flight with a longer loop and more turns. The wind was pretty strong and gusty but the model held its stability well. Will fly even better in still wind conditions.

Congrats. Nice flight. Is the wing flat or slight camber?
Really looking forward to your Peabody Packet flight video. Should be awesome.

Quote from: Free Flight on December 20, 2019, 05:54:20 PM
Congrats. Nice flight. Is the wing flat or slight camber?
Really looking forward to your Peabody Packet flight video. Should be awesome.

The wing has no camber so is simple for construction by beginners. Nevertheless the glide is pretty efficient.
The twin prop Peabody will be test flown soon. Also the high aspect ratio A6.
Lot of flying to do.

This is a cute unique design by the late Bill Brown named Yvette after his daughter. Made it over 2 years ago and flown it in several workshop/demos. Has taken quite a few knocks and undergone minor surgeries as most demos are in restricted spaces-- but still flies pretty well. Somehow never took a decent video of its flight. Got a very short video in a recent workshop.
Plans are on the Hippocket forum alongwith some of his other interesting designs.
Pics being converted to reduced size and format for attachment asap
https://youtu.be/5hX2tuU5N_Y

@glidiator,
Here's an example from my RCG Vintage forum to support what you are trying to popularise.
Best wishes

https://m.youtube.com/watch?feature=emb_logo&v=02d7-D7-GUk&time_continue=82

These old time designs do fly well. The Jetco kits were pretty popular from what I read on the net.
This model has those wing tip tabs that are useful to adjust trim.
I still have not actually flown my Hangar Rats made quite a few years ago and safely boxed and stored.
A good large indoor venue will have to be found soon to test fly them. The BITS Pilani Goa Campus which is just 10 mins from my place has a large 3 badminton court space. Plan to use that during a workshop for their Aeromodelling Club is planned in January.

Hi all,
Check out these series of YouTube videos on  indoor rubber powered Aeromodelling.
In several parts on this channel covering cutting, covering, glueing, tools required, rubber preparation and winding, etc, etc.
Check out the whole series and your understanding of construction of indoor rubber power models will get a boost.
Get into this fascinating world of indoor free flight this new year.
Happy flying
Anant

https://youtu.be/Xie6gE55q1c

No post on this thread for 20 months!

Last month a teenager, who had recently gone solo under an instructor (on foamies and ARFs) was fascinated by my balsa models. He wanted me to teach him to build balsa models. So I gave him a chuck glider and a small rubber model from Guillow. Told him to get a Guillows kit, and an Apple Box (desi Orange Box) from Sharma Models in Jodhpur.

So he got a Guillow Cessna 150 (24") and the Apple Box.
Last 5 days spent building the Cessna. Once I showed him how to read/understand the plans and instructions, he did about 75% of the build. (I did the covering and wing mounting)

Nearly complete, but for windows.

It weighs 45gms without rubber.
The rubber in the kit is 24"x1/8". 4gms. (Some white stuff, not Tan)
And the plastic prop is 5" dia.

With this prop and rubber, I think we'll get only about 10-15 sec flights.

I have a Peck Polymers 7" prop, and a few feet of 1/16" and 1/8" Tan Super Sport rubber that I got last year.

The question is:
What prop and rubber should I use to try for 1 min flight?

Hi,
Good to see you mentoring a youngster in rubber power free flight.
Firstly the suitable prop. Here is a useful insight I got from the review of the AMA Alpha model on endlesslift.com.  — quote:
" the required propeller size depends on the area of the wing. There is a relation between the area of the wing that supports the airplane's weight and the area of the swept disk of the propeller that pulls it through the air. As a rule of thumb, the propeller diameter should not be less than about the square root of the wing area and as much as 1.5 times the square root of the wing area. "
2) As for rubber width — depends on AUW
For 45gms weight of model 1/8 rubber I estimate to be underpowered unless multiple loops are used.
I have a XL sheet that you fill in various parameters and it gives suitable rubber width. Will dig it out of my Aeromodelling folder on the PC and see what parameters are needed. My guess is for 45 gms minimum needed would be 1/4"  rubber - that may also require multiple loop. Try a flight with 1/8" tan rubber and see if power is enough. In order not to waste rubber in testing — can use motor loop that is half the hook to hook distance and use a hard balsa stick with hook at either end to cover the balance distance between hooks. With this short rubber lesser winds will give high torque to demonstrate how the model behaves before taking a full length loop and winding to similar torque.

Also to increase duration rubber loop should be stretched to max and kept stretched for about 5 mins. This increases flexibility of rubber. Loop should be lubricated - some silicon based lubricant or even very soft liquid soap. — hand wash
Follow the stretch winding technique to get more winds into the loop— i.e. stretch loop to about 80% and start winding — and slowly come closer as you wind and rubber tension increases. Careful not to break rubber. Can use a hand drill with a hook fixed in the chuck for this.

My good friend and fellow Aeromodeller Madhav Khare of Pune has a kit called Spinboy. Costs   around 300/-. Suitable for indoor and outdoor (in light winds).
Comes with tan rubber. Tissue covered model. Another modelling friend in New Jersey who was sent this model just sent a video of it doing a 1 min plus flight indoor.
It has all laser cuts parts and ideal for beginners in rubber free flight.
Link of my first test flight of this model . Wind was pretty stiff - 15 kph atleast - Model did quite ok in these conditions.
https://youtu.be/icseihzOodM

@KKAwait update on your students Cessna build.
Sent some XL Sheets by mail that helps to decide on rubber width etc. Hope it was useful.
Anant

Hi all, I was looking for some Tan supersport 3/16" rubber. Since we don't get them in India, and it is lockdown period, is anybody willing to sell me some of the rubber?

Thanks
Adarsh Lakshman

There is an Aeromodeller friend in Pune who supplies various kits and accessories.
Will check if he has stock. How much length do you need. Note that even our postal system is not normal and since flights are disrupted lot of delays. Where are you based.?

Hi. Thanks! I am based in Hyderabad,telengana.

Regards
Adarsh Lakshman

I was thinking of getting around 5-7m

Regards
Adarsh Lakshman

Hi Adarsh
Will check if it is zvsible and can be posted to you.
Which model are you going to use it for. Indoor or outdoor. Any pics?
Anant

Thank you. I was planning to use the rubber for my peanut scale Sopwith Camel,and 24" senior dart. I was also planning to keep some extra for future builds.

Guillows kits?

I never got any of my guillows kits to fly.
The Sopwith camel is from vintage model company and the senior dart actually from rc bazaar
The Sopwith flies great,but the senior dart has a very weal airframe,and it came with a pretty rubbish prop,so I'm using another nose block for it.

Hi Adarsh
Have you made / trimmed/ flown rubber free flight earlier?
Lot of stuff on YouTube that will give you inputs on getting good flights.
Any info you need I can provide whatever has been my experience.

I have attempted to build rubber powered balsa kits,but these were the only succesful ones.the Sopwith especially flew well making nice circles. As for trimming I just use clay to weigh down the nose/tail/wingtips.
If I ever have a problem with the planes,I will surely consult you!

Does your friend in Pune deal in balsa FF kits? Like guillows,peck polymers etc?

He has his own kits. Not scale models but few indoor/ outdoor FF models.
He also has nose hubs and prop spars  fixed at 45deg to which any blade shape can be attached. Very useful for  rubber FF C scratch building and experimenting with different prop shapes and different  helical twist.

YES Gulliows kits don't fly too well.
Are you into scratch building from plans. Can make some not very complicated models that fly well.

If you are ordering rubber from him - check what widths he has and stock different rubber widths. Then you can make various models of different weights and spans.
Have you made any indoor rubber model ?

Attaching his message

" I have stocks of 1/16", 3/32" and 1/8". The last one 1/8 is equivalent to 2/16 and he needs 3/16.
He can try a combination of  two loops 1/8 + 1/16 which equals 3/16.
I can supply this way."

Contact him on +91 98901 25914.-

Happy flying

Wow! Thanks!

Haha as a matter of fact I was going to start my first scratch build today of a heinkel 71 A from a peanut scale Walt mooney plan

Hi Adarsh,
Good to see a peanut builder in the forum!
Hope the Pune source works out.
Here's what I drew up last month, but yet to start building it...

Regards
Iyer

That's a nice design! Is it yours? O am planning to start the Walt mooney heinkel 71 A today. I messaged the pune person,and I am waiting for the reply. Hopefully I'll be able to get some rubber
By the end of the month?

Regards
Adarsh

@Adarsh If postal services are normal it should come soon.
Are you on the Hippocketaeronautics forum. If not recommend joining. Lots of useful info and you will get a lot of good advice from experts for any difficulty you have in building or improving performance.

Hi all,
How many on the Facebook group— Indoor Free Flight.
A Corona Livingroom mini stick postal contest is on since March with everyone stuck inside their homes with the lockdown. It is a single design contest of a model call — "" Scraps".— a 1940s design somewhat like a mini hangar rat.
I've joined the fun and posted some of my efforts.
All the worlds champions are participating.
I've managed No Touch flight of 30 secs in my guest room that has least obstructions. The champs are posting flights of over 3 mins. John Kagan - the F1D 60min flight record holder has done. flight of 6 mins.
Different categories- No touch, with steering, original design model, modified design etc, etc.
Lots of action.
Check out the Facebook group and join the action
http://indoorfreeflight.com/scraps.html

Finally got down to test flying my first twin prop rubber model - the Peabody Packet.
Took a video in Slow Motion that gives a good view of the flight characteristics
Short test flight in restricted space of about 10 mtrs length in my cluttered drawing room.. Earlier flights showed a slight stall - so added some nose weight, Also corrected the tendency to turn sharply to port by giving about 50 more turns on port motor. Flight was on a straight path and there was no loss of height till it hit the opposite side -a slow climb after halfway mark could be seen. The card tab elevators were full 09 deg. Now for full power flights in larger space or outdoor in calm winds.
Main wing spars made from Paulownia wood - a bit heavier than balsa but stiffer and stronger. covering is thin grocery bag plastic. Wing held to fuselage by rubber bands and booms held to wing by rubber bands. V Tail held at apex by thin thread tied in small tabs. So whole model can be fully dismantled for transportation / storage. Rubber motor 3/32" loop that was hook to hook length. 250 turns on Starboard motor , 300 turns on port motor. Will use much longer loop and wind off the model to full torque for longer flights in calm outdoor conditions or in large indoor space.

https://www.youtube.com/watch?v=qiOake6N4uU

 :thumbsup: reminded me of my first powered free flight had to run behind it  ;D

@glidiator,

Eagerly await a better quality video, maybe outdoors (ie, no tubelights!)

Regards

The LED bulbs seem to be creating the flicker in slow motion.
The flight in the normal speed video was too fast to get a good appreciation of what the model was doing so took a slo-mo video.
Still raining pretty heavily past few days. Waiting for clear weather to do an outdoor test flight. Large indoor spaces still shut due to Corona. The temptation to test fly it in restricted space indoor even at the risk of damage was too strong. Luckily no cracks or other damage to frame in the test flights conducted for getting a decent trim indoors.
Longer loops wound off the model to appropriate torque should give satisfying flight duration. That will also need some more trimming for higher power.
Lots to do to get it finally right.
Anant 

Gladiator, hope you find a great big indoor place as in your past videos. This "Packet" is truly lovely with great potential. Congratulations.

Yes the Packet seems very promising.
After this positive experience with the Packet have downloaded the plans of some interesting "No Cal" twin prop models like the B12 and B 25 which I aim to add to my to do list of multi prop models.
Got the links from parmodels.com site you sent me.
Things are slowly opening up so the large indoor spaces should soon be available.

Thank you for sharing this, which I found by searching for Bobni. I built both the Bobni and Sitni as a pre-teen in the mid 1960s in Bombay.

Quote from: sahilkit on September 12, 2020, 06:51:37 PM
:thumbsup: reminded me of my first powered free flight had to run behind it  ;D

In the 1960s I used to go with an older friend to the Oval in Bombay to fly his powered planes. He would put a few drops of fuel and launch, to see the plane come down a few hundred metres in front of us when it ran out of fuel.

That was a different Bombay. I staying on Wodehouse Road bear Regal theatre.
Today Oval is like a fish market . House abutted the ground that Campion school used. Their air wing NCC used to fly control line models in the ground. That inspired me a lot in my Aeromodelling interest.

Quote from: Glidiator on October 02, 2020, 11:06:21 AM
control line models

If that's the kind where there are two wires that come out of a wing and you move a handle to cause it to rise and descend, then my friend had one of those. Unfortunately, one came apart in mid-air and crashed on a passerby. The propeller was still spinning and cut his face, but it was minor and he laughed it off.

Hi all,

Just finished an outdoor/indoor all sheet model -- THE ZIP
A fairly easy quick build. Weight without any finish -- 21.5 gms
Used 1mm Paulownia sheet for main wing as this wood is very stiff and will not dent easily.
Did some very preliminary test flights in an outdoor space near my house. A bit of a stiff sea breeze. The model struggled to make headway against the wind but kept a steady height and was turning towards right. No videos as my mobile is kaput.
Need to increase power. Now using 2 loops of 3/16 rubber - will upgrade to 1/4 and see if more torque /power improves performance.
Need to build a stooge to fix model and stretch wind rubber on the field.
Grass on the field is dry now and just right in height to prevent damage to model in hard landings / dives during test flights.
Lots of testing to be done - a flight anywhere near 1 min will be great. A capacitor power plant should also work well I fell - will try that 
Anant   

@glidiator

Sir,
If you could arrange for props (commercial or hand made), hubs, axles, balsa strips and rubber, it might be possible to generate interest in a one design contest, with an AMA Delta Dart or Hangar Rat or similar.

It's not easy, and won't be economically viable, so I wonder if it's worth the effort.

BTW, await your Lunchbox!

Regards

@KK

Dear KK.

The contest could be conducted using the SPINBOY Kit made by Mr. Madhav Khare of Pune. It is a good easy build with all laser cut parts and prop with hub and TAN rubber etc. Cost is within Rs.300/- Can be built in a couple of hours. Very little trimming required. Had posted a flight of this model on this thread earlier. My model flew pretty well straight of the board.
Could propose and see the response.

Quote from: Glidiator on December 20, 2019, 12:46:10 PM

Regards
Anant

Worth trying.
10 entries would be a good achievement.
Though you will be out of pocket if you offer prize money!
Regards

Lets give it a go after the completion of the Lunchbox HLG/CLG event.
Regards

Rummaging thru the old boxes to ensure Ihave enough kits as promised.
Dug out the original  IHC Chaser.
The old black rubber limited it's performance. Let's see what it does with suitable TAN rubber.

 Sir
its not true that no one interested in rubber power and chuck glider .I am =very much interested in these true aeromodelling but some time lack of time and other reason .last and most important  lack of flying field . 
regards
arvind Khare