If any of you, guys, have a 1/7th scale model of a TF P-51B/D with a fully enclosed power unit (so that no part is protruded over the scale outline) I would really appreciate if you share your wisdom here. I would prefer modest/cost effective power unit that will allow me to fly scale, no extreme aerobatics involved, but I am open to all options (even converting it to eclectics). I also wondered if any of you have a power unit turning scale 20" prop, if it is at all possible.

Although, I could not find any related material on this board, I must missed some thread and if you know a location where this subject was already discussed – please let me know.