The centrifugal force on the spinning blades increases as the square of the rotation speed, which makes this structure sensitive to overspeed.
22.
Investigation finds cause to be failure of tail propeller control system, causing overspeed condition which generated unexpected and uncontrollable nose-down pitch.
23.
All four main engine overspeed trips were actuated; cork insulation flew; lights broke; clocks stopped; and water poured down the antenna trunk.
24.
These systems provided a voice for most warnings, including fire, altitude, cabin altitude, stall, overspeed, autopilot disconnect and so on.
25.
While much depends on the nature of the load, it is generally safer to overspeed a 50 Hz motor to 60 Hz than vice versa.
26.
This avoided the overspeed problems of the original design; when load was removed, simply shutting off the airflow to the turbine would slow it down.
27.
A growing number of general aviation and commuter aircraft rely on Woodward AES overspeed governors, synchronizers and synchophasers for the turboshaft, turboprops and reciprocating engines.
28.
The aircraft was on a ferry flight to Prince Rupert Airport when the starboard propeller went into overspeed and the decision was made to return to Vancouver International.
29.
About four seconds after the double propeller overspeed began, the beta warning horn started to sound intermittently, although the pilots stated afterwards they did not hear it.
30.
The report said the captain had a habit of violating safety regulations in order to arrive on time, even disabling safety devices in order to overspeed the aircraft.
