Originally Posted by
megan
I wonder how a S-76 would fare running at idle with the rotor brake on (legal to do) and then throttle pushed up to fly, how much TQ can the brake hold?
We had one famous customer that insisted on both engines running ( IIRC both could be started with C+ or ++ ) and the brake set. I never ever trusted that 76 brake for this purpose, even after pumping the pressure right up. You had to watch the engine oil temps for prolonged operation as the oil coolers came off the tranny fan and set the blades at 45 so you didn't cook them. Famous person came wondering out eventually and walked under the disc and the brake let go. How the descending low blade missed her head I still wonder to this day. I was surprised how fast the rotor reached ground idle speed immediately after letting go. She was a lucky lady for sure.