RC India

Browsing through Outerzone.co.uk I came across the Honker Bipe (http://outerzone.co.uk/plan_details.asp?ID=5801 (http://outerzone.co.uk/plan_details.asp?ID=5801))

Having never built a Jedelsky wing before, I was intrigued, and decided to give it a bash  ;D ;D

I ordered some balsa from RCB, which was delivered with their usual rapidity - 3 days from order to receipt! RCB rocks  :)

(http://s25.postimg.org/agi5nwx8f/20141001_115918_Copy.jpg)

(http://s25.postimg.org/hig3a40u7/20141001_115924_Copy.jpg)

The build is relatively straightforward

I did do some modifications as I will be using a Brushless Motor, not an engine

(http://s25.postimg.org/80gca2f5r/20141002_112244_Copy.jpg)

The MAS plane is a big help for removing large amounts of balsa. The SKIL orbital sander helps too

(http://s25.postimg.org/ch8p8qtdr/20141002_113358_Copy.jpg)

Used here to make triangular stock

(http://s25.postimg.org/7dhfkji9r/20141002_120003_Copy.jpg)

Anticipated weight about 1.1-1.2 Kg all up (with 2200 3S Lipo)

Thought about a 2836-1200, but wanted a little more torque, so selected the DM 2610 - 1200 KV from Kinetic Hobbies

(http://s25.postimg.org/4329c573z/20141003_210451.jpg)

This motor comes beautifully packed, with most accessories. Decided to mount it from the inside.

The interesting, and in my opinion very good thing, difference I found in this motor is it has a 3 point shaft retaining/mounting arrangement. Instead of a circlip common with most Chinese motors, this has 2 retaining rings. Having had a couple of nasty incidents with circlip failures, I'm pretty happy with this. Also, that fat 5 mm shaft inspires confidence  ;) ;D. 89 grams is an acceptable weight with connectors.

I used a 30 A ESC from Kinetic Hobbies too

(http://s25.postimg.org/h8hri90zj/20141003_210504.jpg)

(http://s25.postimg.org/yzk7581mn/20141003_210436_Copy.jpg)

Cut a hatch out from the fuse top. Put a ply tongue and a hatch lock

(http://s25.postimg.org/xyt57kzen/20141003_210516.jpg)

Bottom wing. Have to cut out the ailerons still.

(http://s25.postimg.org/ouzbkvn7j/20141004_184323.jpg)

Oops - a servo connector needed changing  8-)

(http://s25.postimg.org/y0331018f/20141005_123114.jpg)

Cutting out cabanes. Used 3 mm lite-ply - had doubts  ??? ??? So I then doubled with 3 mm balsa too :D

(http://s25.postimg.org/pztdq99of/20141005_202951.jpg)

I used Monokote (generic term for heat-shrinking self-adhesive film) hinges throughout. Been a very very long time since I did that, and the first time I'll be using Monokote hinges on Ailerons

(http://s25.postimg.org/3pa4411rz/20141007_191651.jpg)

(http://s25.postimg.org/vqjk3zhof/20141007_191658.jpg)

(http://s25.postimg.org/73sak5x6n/20141007_191900.jpg)

(http://s25.postimg.org/kahqjosvz/20141007_192222.jpg)

(http://s25.postimg.org/ieqcusenz/20141007_202224.jpg)

(http://s25.postimg.org/e0mgwothb/20141007_202229.jpg)

How I would like one of my engines on this model  {:)} {:)} {:)}.

Any chance if it will come up for gift once done I am first on the line.  (:|~   ;D

Sandy saheb,

If I don't bust it on the maiden;

and if I decide to give it away;

and if it is in flyable condition at that time;

you would be welcome  :D :D :thumbsup:

nice build!! good to know tat ur working on sanding too!! the advantage is that the time taken to build a Jedelsky wing is less but on the other hand considerably more amount of wood is used than normal airfoils!! Jedelsky wings are mostly for slow flying, lets see how yours goes!! had used them on my Jetex 250 build , turned up nice but didnt have too many flights!!

(http://s25.postimg.org/gztdjt2yn/20141008_130706.jpg)

Black monokote is horribly difficult to peel the backing film from. Stupid me - I had Black coloured tape  :banghead:

(http://s25.postimg.org/hvugd020v/20141008_130713.jpg)

Tail feathers also use monokote hingeing

(http://s25.postimg.org/9mikyl8an/20141008_130737.jpg)

Bottom wing ready

(http://s25.postimg.org/p1m7fgb3z/20141008_130747.jpg)

(http://s25.postimg.org/3uigrfygv/20141008_130808.jpg)

(http://s25.postimg.org/43g1hdb9b/20141008_132327.jpg)

Subhash, as I mentioned this is the first model I am building with a Jedelsky style wing, so I have no idea.

If, as you say, it is slow, that would mean a lot of lift, which is great. But the designer has called it a Sport Model (this was in commercial production as a kit too)

@sanjay sir - the Jedelsky airfoil is mostly used on gliders!! when someone talks about Jedelsky wing , the thought that comes to my mind are low speed , considerable amount of more lift and low Reynolds number!! actually these don't suit Jedelsky type of wings but Jedelsky wings suit these conditions!! so that means u could use it on a sports model too!!

Sir,
You are using a design from a master. (Bird of Time?)
Being built by a master builder.
Then why the doubts?

When was the last time that you built a model that did not fly?
Can't think of even one in the last 2 years!

dil mange more  (:|~ (:|~ (:|~ (:|~

Hi sanjay,

what grade balsa did you buy from RCB? i recently got B-cut.

Sahil

Grade and cut.
Two different parameters.
No?

QuoteGrade and cut.
Two different parameters.
No?

i'm also interested in knowing (sticker on my balsa says Premium Balsa Wood - Model Grain B-cut)

Sahil

Thank you for that confidence booster Iyer sir  :giggle: :giggle:

Bunty, more coming :D

Sahil, A grade balsa is straight grain cut. The grain runs straight with the sheeting or piece. Its the nicest grade of balsa. The difference in grades is determined by the grain in relationship to the cut piece, some may have the grain at a 45 degree angle to the sheet or more or less, this is usually B or C grade. 4-6lb is the weight of a cubic 1 foot sq. 4-6 pound stock is the lightest grade and the hardest to get which lends the higher cost. 8-10lb stock is less expensive

That said, B Grade works OK too, except in thin sheets

Landing gear. I used a larger diameter tail wheel for 2 reasons - a) I did not want too steep an AoA so I could get time to build up speed, without the model jumping into the air; and b) Rough ground  :giggle: ;D

(http://s25.postimg.org/eu8q05v7j/20141010_085416.jpg)

Nylon Bolts to save weight. If they break, it probably would save my u/c mount, a block of 12 mm balsa  ;)

(http://s25.postimg.org/8j83xhjcv/20141010_085403.jpg)

Since the wings are fastened with rubber bands, there are strong chances they will not be in the same location after diddembly and re-assembly. So used locator pins

(http://s25.postimg.org/s4wktolrz/20141010_100433.jpg)

Fuse complete

(http://s25.postimg.org/asw888san/20141010_100517.jpg)

Hope she flies  ??? ??? >:(

(http://s25.postimg.org/jvfni5lq7/20141009_121938.jpg)

(http://s25.postimg.org/48ouo5ovz/20141010_085317.jpg)

(http://s25.postimg.org/z5kkmgnjz/20141010_085330.jpg)

(http://s25.postimg.org/jy4l23vpb/20141010_085450.jpg)

Beautiful...  Thats a wow...  Hats off

:bow:

PS: Sanjay sir creating doubt to ward off buri nazar

Thanks Doc  :salute:

Girish, I have an easy way of warding off the nazar - make you maiden it  >:D

(If you crash it, you make me a new, improved Honker Bipe  :giggle:)

Wow!
Went through all the pics slowly.
Noticed a lot of fine points.
Wing locating pins, sprung tailwheel leg, quality pushrod linkages at horns, main UC mounted to give a little toe-in, triangular section longerons...
UC legs covered in Monokote - gives a new meaning to wheel pants!
And entire build completed in a single day.  :bow:
All you need now is a pair of symmetrical wings to have a fully aerobatic avatar!

Eagerly await video of maiden flight.

Hey thanks, Iyer sir

Glad you noticed the toe-in.....no one does (except me of course :D)

Used colour tape for the UC legs, not monokote. In fact I normally use Vinyl (The Spadcap, Balsa Piper Cub) but felt lazy  ;D :P

Confession: The build took me a week, @ 3-4 hours per day average  ;) ;D

Next Bipe will be Bucker Jungmeister - the Pilot (OK Model) version  >:D >:D >:D

As to the maiden............. :( :( :-[

Awesome Sanjay Sir!!! Wonderful build. I use Jedelsky wing (foam) for one of my light weight trainers and absolutely love it. Good lift and more because resembles the airfoil of a bird wing.

Eagerly looking forward to the maiden video :)

Thanks so much Vishal :D

Recognize the motor & esc? ;)

 (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~ (:|~

Quote from: sanjayrai55 on October 10, 2014, 01:52:45 PM
Recognize the motor & esc? ;)

Hahaha :)

Superb Sanjay Sir  {:)} :hatsoff: Looks like ARF kit  (:|~

Hi sanjay,

Thanks for the Balsa tip, Post the model AUW and electric setup. Nice build  :) waiting for flight video.

Sahil

Thank you Nithinraj

Quote from: sahilkit on October 10, 2014, 06:38:47 PM
Hi sanjay,

Thanks for the Balsa tip, Post the model AUW and electric setup. Nice build  :) waiting for flight video.

Sahil

All in the thread. AUW 1080 gms with 2200 3S Lipo

Grounded

Setting flaperons. Reversing. Pressed wrong button. Reversed throttle

Stay safe everyone

I normally use the "throttle lock" button on my radio (HiTec Optic 6) when doing this, but was careless

As Girish once remarked, when fiddling, take the prop off  :salute:

oh thats a bad cut, get well soon.

Wishes

Sahil

Thanks Sahil :thumbsup:

 :o That's really bad. Take care Sanjay sir.

Thanks Vishal

Take care ,Get well soon Sir......

Thank you Ramarao  :)

Sir hope you are fine. Take care sir.

I'm tougher than I look :D :D

Thanks Neil, I'll be fine ;)

nice build sir.

Thank you Manu :D

Get well soon sir.

Thanks Aditya :D

today was bad day I got success in my anti stress machine with new wing of which soon I post details at afternoon I got accident I have bone injury (LEFT HAND) so I will not fly for some time, evening when I get online FIRST I SEE DGCA NOTICE AND THEN see your hand with blood sir I love your creation PLZ GET WELL SOON AND AGAIN MAKE A TIGUR COME BACK 

Arre Bunty  :o :o :o How did you get that injury? Do take care

I will be maidening the Bipe next weekend

Super build blog and lightening speed of production.... Very nice Sanj..

Should fly well..
Good Luck with the maiden!
On your hinge technique it just reminded me; On my IC Silhoette kit (like your Spad Cap) I used Solar Tex film as hinges with two layers 6cm wide lock-stitched in the middle... That was many years ago! :)  

Been neglecting this post and model recently - too much else going on!

Finally got the model trimmed. It would just climb vertical!

After much experimenting with downthrust etc., zeroed in on the Incidence  ;D That Jedelsky wing has phenomenal lift  :o :o

The lower wing incidence was too +ve; first put 3 mm packing under the lower wing L.E. Nearly OK. Now increased it to 5 mm.

Hopefully will have a video next weekend

Don't know how I missed this thread. :headscratch:
Fantastic build  :)

Thanks Maahin  :thanks:

We'll try to keep 'er alive till you come  ;)

Quote from: sanjayrai55 on October 10, 2014, 06:47:15 PM
Grounded

Setting flaperons. Reversing. Pressed wrong button. Reversed throttle

Oh...sad.. That looks nasty Sanj.... Sorry I missed this post totally...

Hope the hand is much better now!

Thanks Deepak. I'm OK now  :)

Pleased to hear that.... Happy landings!
:)

Bumping this post.
Love to see the video sir.

Hi Manoj

Too many other models flying, and too many foggy days!

Next time I take it will take a video, for sure.

Thanks  :thumbsup:

sir, i too was hoping for a video!!

Here's the video - finally  ;D

http://www.youtube.com/watch?v=TAAS9VJxEjg#ws (http://www.youtube.com/watch?v=TAAS9VJxEjg#ws)

Please ignore the last 3 seconds  :-X - I don't know how to edit it. The idiot just came and parked there

If it is disturbing let me know, I will remove the video

Hey Sir Nice Video And Have to say that its really cold that side you know 2'C and sometimes temperatures in Minus too.
But If there is one thing like Samosa with Garammm Chai We Can Survive That YUM!!! LOL
Regards,
Aman.

Nice build sir  {:)} {:)}   ,was the guy hurt is the plane ok

Aman, we sometimes do get Chai & Omelette at the field  ;D

Roman, thanks. The guy wasn't hurt because he zoomed off before I could reach him  :giggle:

Minor damage on the plane, fixed

sanjay sir i am very late excellent build and nice maiden congrates :thumbsup: :bow: :bow:

Thank you Gaurang  :thanks:

Sir Chai And Omelette YUM!!! but what about Samosas and Kachori With Green Chutney !!!
I need that  Now
Once again salute to you for an Excellent Build :salute: :hatsoff:
Regards,
Aman.

Good one Sanjay sir!

Thank you Vishal :D

A word about the Electronics used

I used a DM 2610 - 1200 KV brushless motor from Kinetic Hobbies with a 30 A ESC also from them. This motor performs superbly; it swings an 11X 5.5 prop with ease and gives a healthy 300 Watts plus. Considering that the model can use a 15 to 25 size Nitro, the power I got was more than adequate. Both motor and ESC run very cool. In the video, except the take-off, I am running at about 5-~60% throttle.

I have used a variety of batteries, including the Haiyin 2200 3S 20 C. This battery (I have used it on my QB 20 too at 40 A continuously) performs well too. After 20 plus charge/discharge cycles it still charges to 4.20-4.20-4.20 and there is no puffing. A good LiPo!

Thanks for the feedback Sanjay Sir! I'm glad you are happy with their performance.

 :thumbsup:

Link to the pictures

https://postimg.cc/gallery/1mhyr2ek/