What size airplane (maybe a J-3) would you place this 50cc twin cyl engine on? Thanks Capt,n

http://www.youtube.com/watch?v=BtzwiFamFuw

Aeroworks Sport Cub, if your pockets are deep enough!

It would fly a 1/3 scale Cub.

UPDATE...In the video I was running the Kavan 50 Twin on glow fuel but with a RCxcel CD sparkignition I installed on it. I ran the engine since with strait acohol no Nitro fuel. It run better, because it only needs about 2 % oil in mix shere glow fuel has about 18% oil in it. This engine has its own oil supply so that works good. Also the timing can be controlled with spark ignition but not with glow fuel. Very good starts....with no kickback( I have the spark retarded for show). I can buy strait alky in this area gor about the same as pump gas. I like touse alcohol fuel...it runs cooler. This engine by the way is very good on fuel.

I am going to pick up a big Supertiger 2300 or bigger and install ignition....same fuel but more oil. If it runs good I will have Ken Lambert place needle bearings in it...then use less oil. Best Regards
http://www.youtube.com/watch?v=BtzwiFamFuw