BETTER PROPELLERS FOR LIGHT POCKETBOOKS

OPERATING characteristics of several propeller-engine combinations for private-owner type aircraft are reviewed to compare performance, weight, and cost.

It is concluded that, for airplanes having low wing loading and high power loading, controllable-pitch propellers improve take-off and climb performance. However, weight and cost considerations favor the simpler automatic 2-position propellers. Planes with high wing loading and low power loading definitely need controllable-pitch propellers.