Piper J-3 Cub - 44" Wingspan

Started by findvikas, November 23, 2010, 12:01:55 PM

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findvikas

Awright guys... looks like its ready for the maiden.

See the control surfaces test video here



Equipments check and how they are fitted in place video here.



Let me know what do you think, only thing left from myside is fake engine mount (already working on) and wing decals (the call sign numbers)

saurabhhsrivastavaa

Nice Cub... :) ALl the best for the maiden.  {:)}  :thumbsup:
Cheers !!!
Saurabh
+91 7977382130

rohitgupta322

Be Inquisitive

ujjwaana

Nice way to do the static test!!

There is visible 'Up thrust' due to your motor angle. Be careful as actual takeoff may result in a sudden stall. Try to take off at lesser throttle (60-70%) if possible.
I lost my similar design Blue Baby due to bad CG + Motor angle.

Where you guys fly ? may be we can give it a try after evaluating the Electronic City field.

Happy Maiden.
Futaba 8FG Super | HK-450v2 | FA-22 Raptor |AXN Floater-Jet | FunJet | Black Horse Edge 540 | Amp Master 015 | 2.3M Big Brother

findvikas

Thanks guys... today we could not make it to... planning tomorrow 7am at Hoskote lake bed... anyone wanna join?

Ujjwaana, CG is near 35-40% from the leading edge of the wing. yeah even I noticed the up thrust and decided to keep it like that for now and maybe I will trim the elevators to control the up thrust. The reason why I believe that up thrust could be fake in this static test is because the way its hanging...

Imagine something is hanging to a static point and it tries to go forward while its hanging... it is bound to go up as the force (pull) is coming from upside.

atul_pg

Great job Vikas..Clean Build..

Wish you all the best for the maiden..




findvikas


findvikas

This is the decal that I am planning to put on the top right wing and left lower wing

iamahuman

"Chuck Norris once overcharged a lipo. Thank him for the Sun."

SSC LCG Slash 4x4.
JQ THE eCar.

controlflyer

Vikas, that is one nice build you have there, I have seen these planes rattling over St. Cruz in Mumbai, I suppose they give out flying lessons on these planes..
Just one suggestion after viewing your video..
Your plane is a bit tail heavy which is dangerous, no matter how many tweaks you do a tail heavy plane will always stall unless your fingers are always on the elevator/rudder..
just my 2  :Rs:
Money flies when the transmitter is ON...

findvikas

#35
Thanks controlflyer... This plane is my dream plane and I hope to fly it for real someday... Since its inception in late 1938 this is the best flier for beginners so no doubt if people give training session in this. I had seen it couple of times at HAL Airport, Bangalore from my office next to Airport now since that Airport is no longer used commercially I dont see it anymore :(

About the CG & weight adjustment... I will have to do a glide test to check the actual balance.. also I have still not checked the AUW.. my scale just died.

findvikas

#36
Quote from: iamahuman on November 27, 2010, 07:18:04 PM
Why not VT-nnn?

Good question... I should use India Call sign.. lets change it to VT then :) Thanks

SunLikeStar

great build findvikas!! love the control surfaces test video. best of luck for the maiden  :thumbsup:

iamahuman

You are welcome man.

Mera Bharat Mahaan.
"Chuck Norris once overcharged a lipo. Thank him for the Sun."

SSC LCG Slash 4x4.
JQ THE eCar.

findvikas

Well... I just decided to do some history check for VT and probably I won't use it for its origin.. VT stands for Viceroy's Territory and there had been lots of discussion regarding changing it to India specific Call sign.

Sources:
http://www.timesonline.co.uk/tol/news/world/asia/article2324601.ece
http://www.mid-day.com/news/2009/aug/030809-Viceroy-Territory-aircraft-British-era-Praful-Patel.htm

This call sign "VT" was inherited from British when India won Independence but no one bother to pay attention to that, even after more than 60 years of Independence we still follow the same call sign that British used to... I dont think that's a good idea. hmm.. confused :)

iamahuman

#40
Oh..I never knew that.I guess you can revert back to N-0000

Down with the colonialists >:( >:D
"Chuck Norris once overcharged a lipo. Thank him for the Sun."

SSC LCG Slash 4x4.
JQ THE eCar.

rajathv8

hey you bring the su also tomo? hope i get up early :D

findvikas

Yeah... both of them, my Micro Piper is in Hangar for repairs so wont bring it down there...

rajathv8


findvikas

What a day it was.... woooo... super fun and exhausting. We reached Hoskote around 8am in the morning with Foamybuilder & Rajathv8.. on the field R.C & couple other guys were already there.

I started off with my Su-31, it was underpowered with the original prop that I had been using then I used 6x5 prop and it was able to fly... nicely but yet not enough power to do unlimited vertical climbs. There was too much wind and gusty as well. Su-31 did not had enough weight / thrust to fight back with such gusty wind. The only advantage that I got with the wind is I was able to hover with the nose up and stand in the wind for couple of seconds in the head wind.

Then comes the Piper... boy its wings are too big for such heavy wind, it was not easy to hold it even in hands in strong head wind.. it wanted to take off automatically without any power. I used 10x6 prop for this and it had the power to do unlimited climb with such heavy weight. Some problem with the trim of ailerons and I could not fly it for more than 5-10 seconds I guess. Another factor was orientation... I could fight with the ailerons when its tail facing me but as soon as its head turn to me I mess up :) Need more Simulator time I guess.


Videos will be up soon , correction, crashing videos will be up soon :)

oh yeah it was exhausting day we stayed there till 2:30pm (more than 6 hours) without any water or food in a hot sunny day. Next time we need to take  some food, enough water / beer & SPF-15 a MUST. I could see the color difference on my arms :)


findvikas

Here is the video that you all have been waiting for...

we could not capture all of it as I "thought" that my Handycam was fully charged :-(

Watch in HD if you like, and ignore the date in the video...  :)


findvikas

Limited space... big planes... How do you keep them at home? My solution for my cub :)

Hang it on the wall... looks beautiful too :)

findvikas


findvikas

Decals done... I am afraid of crashing this beauty... :)


ajaytanna

Hi Vikas,
Following the original post you have referred to in the other forums. I have a question. I intend to scratch build the same model but with a wing span of 33 to 36 inches. How do i do this? Any ideas? Should everything be altered proportionately except the mono-block part & fuselage width adjusted accordingly. Please suggest.
Thanks