RE: 1/5 Scale T-34? Sure why not.
If you build per plans, you will be surprised how light this aircraft ends up for its size. as for power options, my brother has one of these built per plan with an OS 160 two stroke installed and i cant say it was anything blazing fast. also a friend of mine had one totally decked out, it had a Saito 120 four stroke, and it wasnt underpowered. my point is this airframe can handle a wide range of options. hopefully others will respond with their power choices.