propeller brake

propeller brake

A friction brake used on turboprop engines to prevent the propeller from wind-milling in flight after it has been feathered and from rotating when the engine has been shut down. In a free turbine, it prevents prolonged wind-milling when the aircraft is parked.
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The SI 2 is equipped with a propeller brake to stop its windmilling, which reduces wear on the propeller clutch.
Stemme S12: touring and soaring: with a Rotax 914 engine, an autopilot/EFIS and baggage space, Stemme's SI2 offers the best of two worlds
Just as we began to give up hope and prepared to execute the "prop fails to feather" checklist, the RPM began to decay and the propeller brake finally engaged.
Pitchlock & cheese holes
With the MIMs in hand, we continued to the next step, which was to check the propeller brake. This brake prevents the propeller from rotating in the event of an airborne shutdown.
A piece of ... what?

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