Please i would like your help.
I am looking fir a piper cub for 91 4stroke engine
I would appreciate your help.
Thanks

johnny,

A .91 4-stroke should put you "in the ballpark" for just about any of the larger Cub kits out there. Check Sig, Balsa USA and Great Planes among others to see which kits fit your particular fancy and finances.

papermache

The 91 4 stroke would probally fly the Sig 1/4 scale cub O.K, and probally scale-like, but 1/5 scale might be a little better choice and offer the abillity to maybe even do a few simple aerobatics especially in the clipped wing version. I have the Sig 1/4 Scale Clipped Wing in the Bones, and it will be powered by a Saito 120 when finished. It won't be a hotrod by any means, but should be ample enough to do a few simple tricks.

[quote]ORIGINAL: ckangaroo70

Quote-but 1/5 scale might be a little better choice and offer the abillity to maybe even do a few simple aerobatics especially in the clipped wing version-Quote

I have the 1/5 scale Cub, and at ten pounds flying weight, a .65 is plenty. If you were to clip the wings and make basic aerobat out of it, a .72 would still be plenty. I think you'd be "throwing away" a good engine to put a .91 in a 1/5 scale Cub.

Sig recommends a .90 to 1.60 4-stroke for its clipped wing version of the J-3. If you built the full span, you would get more than adequate performance from a .91, and even the clipped wing would fly fine, although you'd be on the lower end of the power loading spectrum, and vertical performance would be limited.

With the Clipped wing you will be under powered,
I am flying my Sig 1/4 scale C/W with a Magnum 120 and it is just about right. Anything under 1/3 throttle and it will lose altitude. It pulls it through loops just fine. I would say you will be just fine with a .91 on a full wing Cub. I have 4 hours of stick time in a full scale J-3 and when you want the plane to do anything you better be at full power. The Cub is a great flying plane no matter what the scale!!!!
Anthony

I would go with a GP 60 size Clipped wing

I've been flying a GP Cub 60 with a OS 91 Surpass. The plane flies great. Most flights are at 1/2 throttle. I think you would be happy with this combination.