Measurement of Aircraft Propeller Dynamic Loading

Aircraft Propeller Testing Laboratory of VZLÚ Praha-Letňany has been performed strain measuments on rotating parts, especially on aircraft propellers, for more than five decades. The means of signal recording and its processing have been changed during this age, following technical trends in electrical enginering, but a resistance strain gauge has remained the only one sensor easy practicable for the measurement. The article describes the contemporary state-of-the art and presents some examples of signal evaluation to obtain the data required for purpose of design and certification.