Hey all,

how are all of you'se doing , i just bought a goldberg anniv. cub and wondering about the engine... ne one have a sweet combo at once ? 2stroker or 4 ?

thanks for all the replies

I have a Magnum 52 4s and it is a nice combination. Flys good, sounds great. Land, floats and skis

No doubt about it - OS 70 Surpass

how does the GMS .61 BB Ringed Remote Needle Valve w/Muffler sound ?

In my opinion, the only engine that should go into a Cub is a 4 stroke. Anything else would be just wrong. Now as far as size I'd go with a 70 size.

OS, Saito or even the trusty ol' Magnum 70RFS would work. Swing a wooden 12x6 prop and you'll be golden.

What a MinnFlyer said, an OS 70 4 stroke is the perfect match. Good Luck, Dave

I have a OS FL .70 in a H9 Cub. ( It's Perfect for it)

We had a little Air Corps here of GB Cubs - six of them, all built by the same builder, all clipped wings, all with OS 91 Surpass engines. I believe the 70 is a better match, but the 91 will really wake 'em up!

I built one as a camera plane - full length wing, OS 61SF two stroke. Two pound 8MM camcorder in the cabin, looking thru the flat glass windshield I used. Looked like you were sitting in the pilots seat.

An OS 70 (or copy) or Saito 72 would be my choice.

I have a magnum 80 RFS four stroke in mine and it does a great job.

Mteal

i know it might not sound right... but ill go with a 2 st for my first engine... .61

whats the diff between ...

SuperTigre G-61 Dual BB Ringed w/Muffler

SuperTigre G-61 Dual BB ABC w/Muffler

The Ringed has a piston ring and the ABC doesn't.

Ringed is $15 cheaper.

The ringed has 1.75 BHP at 16,500 rpm's and should be ran at lower RPM's

The ABC has 1.85 BHP at 16,000 rpm's and should be run more on the lean side.

so what would be recommended

A 61 is really a lot more than that plane needs. If you HAVE to use a 2-stroke, they biggest I would use is the new OS 55. If you want to save some cash, try a Magnum 53. But a good ball-bearing .46 would be good too.

the thing is what if later i wanna put floats or dont u think its easyer to get out of a mistake with more power ? im just asking thanks !

If you want my honest opinion the ringed one will splatter more oil on your plane than the ABC will. I have both and they are both reliable engines especially for the low cost. And yes, the 61 would be the choice if you plan to put floats on it later.

But, if you want an "awesome" cub, floats or no floats listen to minn flyer and go with the OS 70 Surpass!

One other thing about 4 strokes. After 5 flights I only had to use 1 paper towel to clean the oil off my plane and that was mainly for the bugs that were on it!

2 strokes leave one oily mess, thats for sure!

yeh but since its my first plane ill go with a 61 ...i know a 4 stroker would be the way to go ... i wish i could.. but $$ its not the case mind u maybe it could be a x mas present haha but the thunder tiger abc sounds about right for me

Go with what ya want but if you open up that 61 full bore on that cub, look for the wing to fly off or lots of flutter on the ailerons. Of course you can always cut back on the throttle once airborne and plenty of speed for takeoffs. You open up that 61 on takeoff and it'll be going so fast it'll be airborne before it even has a chance to go right or left on you down the runway! About 30 feet and it's airborne at full throttle! lol

That plane wasen't meant for speed. My OS 46 AX i have on my current cub has about all the speed I want without losing the wing.

i guess eih... maybe like minnflyer recomended .. a 55 would be just perfect

.55 or .61 would be OK with throttle management , But a good .46 will fly it very nicely.

I flew mine with a SuperTigre GS 40 for awhile . It actually pulled the cub around pretty good with a 11x5 prop. I then installed a Magnum .52 4c with a 12x6. It also pulled the Cub pretty good . But then again , it does`nt take much engine to fly a Cub.
The .70 4c is a perfect fit for this Cub , but an OS .55 would be a good match for it as far as 2 strokes .
IMHO, I think the OS .55 and .75ax have more mid-range power other 2 strokes . I`ve only flown the .55 , and it had a pretty torquie mid range for a 2 stroke.

Baloney - been there, done that, flew the snot out of mine with the OS 61SF. Flew violent aerobatics at full throttle, even with the extra 2 pounds of camcorder on board. I did (as I do with all my kit builds) use two servos on the ailerons, one centered in each panel. Used standard Futaba 148s with ball-bearing conversion tops. I've seen Goldberg Cubs flown with everything from bushing 40s to 91FXs, and 40 Surpasses to 120 Surpasses. The huge motors had to be shut down to land, but never a structural failure.

Seb23 - although many pilots earned their wings in full-scale Cubs, the models really aren't primary trainers. I'd recommend getting http://www3.omnimodels.com/cgi-bin/w...I=TOWA1130&P=0 to start with and learn to fly while you are building the Cub. The radio and engine can move right from the trainer to the Cub when you are ready, and you have a much better chance of learning to fly and staying with this wonderful hobby. Use coupon number 44W36 and you'll save $10 on the plane. It'll be the best (and smartest) $109.99 you'll spend in this hobby.

I have a Saito .56. And it flies beautifully.