Throttle Ratchet for Bench Testing Engines

Precise setting of the throttle while bench-running an engine is assured by this rachet made from a comb epoxied into a block with a rubber band tensioner over the throttle rod. Adapted from 400 Great R/C Modeling Tips by Jim Newman, Volume I, an Air Age Media publication. Before bench testing prop thrust, RPM and other parameters of a glow, gas or electric power plant, understand the forces acting on a prop spinning at high...