Full Scale Propeller Investigation
The hydraulic motor technology is scalable and full-scale propellers up to 3 meters in diameter have been tested. The four hydraulic pumps are capable of generating a total of almost 1MW of hydraulic power and are, for this application, combined to power a single motor. The motor together with a RUAG 6-component balance, which measures the aerodynamic loads on the propeller, is encased within a drop-shaped aerodynamic fairing.
This assembly is attached to the upper strut and can be yawed. Additional instrumentation is used to accurately control the rpm and monitor the dynamics of the system, as well as to ensure safe operation throughout the test envelope.