Planetary units with helical gears, rather than spur gears, have higher torque capacity and run quieter. • Different manufacturers measure and rate backlash in different ways. • Software tools ...

Specifically, the service identified a single high-speed planetary pinion gear that had fractured. But an internal Safety Investigation Board report -- which has not been made public -- showed ...

Turnage; Senior Airman Brian K. Johnson; and Staff Sgt. Jake Galliher. Photos comparing a new high-speed planetary gear pinion with the remains of one retrieved from the Osprey that crashed in Nov ...