It's possible that a G-26 would do it but I think it may be marginal. Mine weighs in at 20 lbs. That may be a bit much for the 26. I'm using a RCS 180se gasser myself. I won't know till possibly tomorrow if all goes well. I do expect it to do well though.

In an earlier post John_RedSox indicates the OS 160 is , as the manufacturer recommends, the engine to compare to. In other words if you think a G-26 is close to the same power as the OS 160 then you should be fine. I have copied John_RedSox's last two posts below. He pretty much says it all for me:

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"Flew my Staggerwing last weekend with the 160 two stroke. I have two DPM Super Cubs with the 160 twin and believe both of them are underpowered. So I decided to go with the 160 two stroke and I'm very happy I did. The plane is absolutely solid. I'm surprised how fast the roll rate is, takeoffs are a non issue, slows to a crawl on landing, and stalls are non violent. Be prepared too add at least four strips of nose weight for proper CG. I added the fourth strip this morning because it still was still slightly tail heavy.

John"
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"I'm not going to give my opinion on how well the radial work. But I can say I have the Saito five cylinder on my Stearman and it does not have a ton of power, but is cool and very scale.

Yes, I flew off grass and had no problems. Make sure you position the gear wire so the door is at "Full Flex" when on the ground.

The flaps work extremely well. I only use half because full flaps will make it sslo down too much.

John "
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If you think your engine is in this class then have at it!