Hey all how you been doing,

I spotted this engine and wanted one last session of opinions before order, i know i should have gone with a four stroke but this is one of many planes i will built,

O.S. 55AX ABL w/Muffler


PLease post any comments and info


Thanks Seb

This also Came up !

Magnum XL-70RFS 4-Stroke

Either way one or the other will be companied by a Pitts style Muffler Looks much more like a real plane

Or Magnum XLS 52A

Or Magnum XL-70RFS NIB

You don't need a pitts style muffler with a 4 stroke.

im putting that magnum in mine, I cant imagine a cub with a 2 stroke.

Yeh im on the verge of buying that magnum myself

And what do u mean it dont need the pitts style muffler ?

The muffler on a 4 stroke is quite alot smaller than a two stroke and can be angled to where you want it.
The muffler on a 4 stroke will fit inside most cowls or very little will stick out.

Would u recommend that Engine then


What else should i be prepared to buy for it ?

Thanks tonz

Ps. i see this one being in competition with the Os 70 surpass ?

I have nothing but good things to say about the Magnum 4 stroke engines.
For a Cub? Absolutely

I have an OS 55AX and it is a FABULOUS engine...

But the GB Cub just BEGS for a 70 4-stroke!

And like Missleman said, you can use the stock muffler. Sure it might stick out, but not as bad as a 2-stroke muffler - and once it's airborne, you'll never see it

This is a H9 Cub with a OS FL .70, You can see the exhaust sticking out the bottom. The .70 works well.

Right on those are the comments i wanted to hear i think itll be a good flying plane being the clipped wing

I have a Magnum .70RFS in mine. Get it,,,,you'll be happy.

Done deal, its on its way

I went with the MAGNUM XL-70RFS

I would like to thank all of you'se for taking the time to help me out with this

Atta boy,,,,you did good.