Hi

if you loose the gearbox youŽll probably loose half of the power too.... not by lowering the input watts but by lowering the eff.

I wouldŽt use a mega 22/XX "inrunner" for direct drive, unless it is a very fast plane.

If you want a quitet gearbox you need one of the more expensive ones, for ex the Mega planetary (large black one)should be as quiet as the maxxon ones fitted on a Hackers, or maybe a belt drive ?!

hope this helps