The Seagull ran flawlessly on our rigger. We only transmitted rpm data back, but it gave a good idea of propeller performance without needing to plug the data logger into a computer. Later the rpm versis time data can be downloaded, graphed in a spreadsheet and analized. The accelleration data is a surprising match with an inertial dyno power curve. If you have a peak radar speed reading, the rpm is a good speed indicator. We were only measuring straight line accelleration, but cornering speeds could be measured the same way.
I think exhaust gas temperature will also be a useful measurement. Quickdraw says that mixture is critical for peak power, and EGT is a good mixture indicator. It could help on nitro boats with third channel mixture as well.
Lohring Miller