jbeech

Dave, I considered that, but I think I'm more likely to encounter the kind of help I want from an airplane type (I fly both, so this is not meant to cast aspersions on anybody's preference). Also, the question really has more of an application for one of the model airplane crowd experimenter-types (if you catch ym drift) since the application could be rather easily used for a variable pitch propellor equipped model at some time ni the future. You see, it's my experience that model helicopter modelers usually are excellent at building, but model airplane modelers are better at "making" . . . and that's a critical difference when we're going to have to do some making as part of the adapting to derive some power figures. Thanks for responding pal. John