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Old Aug 22, 2004, 02:00 PM
Registered User
Joined Aug 2004
14 Posts
Question
Help, Somebody - J-3 Cub

Hello there.

I bought my very first J-3 Cub a couple of months ago, and all it does on ground take-offs is fly around in LEFT circles on the ground!

After numerous frustrating ground control practices, I set the base trim to the extreme right to start with, and even gave full right rudder before throttling, to try and compensate for the Cub's desire to go around in left full circles!

Nothing doing.

She just LOVES to spin around in LEFT circles.

Please can some kind soul tell me what I'm doing wrong?

I'm afraid to hand-launch it because I think it'll go spinning away to the left in the air!

Thanks and Regards

Amin
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Old Aug 22, 2004, 02:10 PM
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larsy87's Avatar
London, Canada
Joined Aug 2002
3,979 Posts
Is your left wheel spinning freely?

Also, it is most likely torque. Try throttling up slowly instead of firewalling it.

Cam
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Old Aug 22, 2004, 02:11 PM
Specialist in Crashing
UK, Loughborough
Joined Jan 2004
1,106 Posts
Have you checked the wheels are straight on the plane? Also when you look at the plane you want it so the rudder is perfectly straight. If it isnt those 2 things check the propellor is facing directly forward. Then i would check to see if the wings are on straight and level. Dan
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Old Aug 22, 2004, 11:02 PM
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Son House's Avatar
St. Louis Mo.
Joined May 2004
562 Posts
Quote:
Originally Posted by Amin1234
Hello there.

I bought my very first J-3 Cub a couple of months ago, and all it does on ground take-offs is fly around in LEFT circles on the ground!

After numerous frustrating ground control practices, I set the base trim to the extreme right to start with, and even gave full right rudder before throttling, to try and compensate for the Cub's desire to go around in left full circles!

Nothing doing.

She just LOVES to spin around in LEFT circles.

Please can some kind soul tell me what I'm doing wrong?

I'm afraid to hand-launch it because I think it'll go spinning away to the left in the air!

Thanks and Regards

Amin
I had the same problem and it turned out to be the wheel was to loose and would rub on the landing gear wire when the the plane was on the ground. Solution!! I used some left over guide tube frome my Me-109. this fits the wire perfect. cut a section and put it on first. Then put wheel on next. Ruff up the end of the wire with some 100 grit sand paper and cut another section . drop a little bit of CA on and put the other section on. Be careful not to get any on wheel becuse it will freez up wheel!!! Hope this helps!

Son House
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Old Aug 22, 2004, 11:36 PM
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Crestview Florida
Joined Dec 2003
1,817 Posts
Absolutely great suggestions. This problem is not serious...you were very wise to try and resolve it before you went airborne though. If these don't fix it...we will get to the bottom of it. Let us know if you need more help.
Peace
Vammy
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