Plain English Meaning

A gauge that shows how hard the engine is turning the propeller shaft. The harder the engine is working to spin the prop, the higher the reading.

Full Definition

An instrument that measures and displays the amount of twisting force (torque) the engine is delivering to the propeller shaft. In turboprop and some piston engines, it is the primary indicator of engine power output, typically displayed in foot-pounds, percent of rated torque, or psi of oil pressure within the torque-sensing system.

Context Anchor

Seen in turboprop engine operation, especially when setting power during takeoff, , , and engine checks.