Piper J-3 Cub Power 46 ARF+ PERFECT SET UP HELP

[FedericoA]

Hello to everyone, i have done n.4 flights with my new Piper J-3 Cub Power 46 ARF+ .The first two flights i use a 60 amps esc with a 4000 4s 18 c lipo POLIQUEST with a 14x10 apc prop. I flew about 7 min and notice that on ailerons turns at about nearly half trhootle was a bit difficult nearly a bit seated and it tends to stall a bit on level flight was o.k and at nearly 75% throotle was much better but again not a beginner model.

On my second configuration 60 amps esc 4000 4s 18 poliquest lipo but with 13x 8 apc prop....It behave a bit the same especially on aileron turns ....I thought that this model was forgiving but it is not easy to flight.....I'm a doing a wrong configuration.I'm not a beginner i'm a good 3d pilot fl :confused: :confused: ying since 10 years...I have much bigger models on gaz and also low wing but none of them make me flight a bit unconfortable as this piper does .Only at 75 % 90% trhootle it behave better especially on turns .
Please give me some advices for a good set up.

[Zagabond]

1. sounds like its tail heavy
2. big Cubs like rudder/aileron coordinated turns...

Check balance, try using rudder with aileron.

[mcharles13]

Cubs LOVE rudder input on turns. It's definitely a rudder trainer. :)

,mike

[FedericoA]

But if i cut the trootle and see how it behave on straight level flight with no power it tends to glide with a bit of nose down and it seems that is not tail heavy or i my wrong ? :confused:

[jrb]

Does it climb pretty good when adding only throttle starting from straight and level flight?

The tail dragging through a turn that's not coordinated with rudder does make it feel like she's tail heavy.

Sometimes you can easily add a little weight to ther nose by threadding on an extra nut, or getting other nuts that are heavier: i.e. coupling and castle nuts. These can be swapped out between flights w/o a lot of effort to see the effects of the extra weight. Higley has some very heavy weight prop nuts also: http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXL736&P=7 .

Ave you measured rpm or amp at WOT? Are you sure your battery packs are good for the expected amps?

[warhead_71]

Maybe your problem is adverse yaw? If you have a digital TX and separate aileron servos, program in some aileron differential (more up deflection than down) - and/or mix 20% rudder with aileron. My small 47" cub uses a single servo and torque rods for ailerons, with built-in mechanical differential... and I prefer to manually coordinate rudder versus mixing it in with ailerons... but that's a Cub for you - it requires rudder coordination.

[FedericoA]

I see i will take your advises and try...Thank you !

[jrb]

[QUOTE=jrb]How about the rpm or amps?

I HAVE WITH A 13X8, A 46 E-FLITE,4000 4S LIPOS 18C POLIQUEST THESE RESULTS :

420 WATTS

33 AMPS


That does not look good at all and is the root of the issue!

What volatge is listed on your pack, and its max current? Don't answer with 12C or 18C.


In this image you see that two very good batteries give different amps; if your battery is not up to the task you'll do even worse.


Something is a miss with you packs!