Im currently working on a plane. Span is 1050mm (around 40 inches) and the length is 850mm (around 33.5 inches) and i was wondering if anyone could help me with engine sizing (im not after exact answers; but just a guideline ir what you would use in a similar sized plane).

I was thinking a .25 2 stroke (as a complete guess) - any one else have any other suggestions?

...and im also unsure of going either electric or nitro, most likley ill choose nitro but in electrics case i was thinking of a brushed 400 cobalt motor or similar brushless (or as a last resort; a 480 brushed ferrite)...

to demystify this broad question ( sorry) im after a plane that is fairly if not moderatley aerobatic so i guess a OS .25 is looking good [&:]

Any input or comments are appreciated...