RE: Lindberg PT-109 power?
Hello Ron,
When I'm correct, it's a MTB (Motor Torpedo Boat), right?
This hull, at only 29 inches long needs to be kept as light as possible, in order to get it on the plane properly and have decent running time.
What size motor did come with the kit? If you don't know, measure the diameter and can length (without the shaft).
What gear ratio are the gears, what size props are provided?
Do you want to run it (semi)scale, or does it really have to fly?
I myself are no great fan of gears, the noise ruines the scale appeareance, it consumes power and the reliabillity is not great.
Do you have a few pics?
Greetings, Jan.