COLD-STARTING CHARACTERISTICS of the CYCLONE ENGINE

BOTH cranking torque characteristics and starting characteristics of three types of Wright Cyclone engines were studied by the author.

Torque can be minimized, he found, by keeping both oil viscosity and the speed at which the engine is cranked as low as safety will permit.

Throttle quadrants may be marked with a “start” position, he says, because there exists an optimum setting good throughout the temperature range.

Investigations of cranking speeds and priming systems are reported.