Contents
What is the purpose of the generator drive disconnect switch?
Disconnects the Generator Drive from the engine in the event of a Generator Drive malfunction, only if the engine has been shut down first. At any time on the ground or in flight.
Why do small planes prefer DC generators?
The reason is the greater quantity of poles in the generator and hence weight. Smaller aircraft use a 28v DC system for the avionics.
Under what conditions would you get an amber IDG drive light?
The DRIVE amber caution light comes on when: * Low oil pressure is sensed in the IDG * The IDG is disconnected automatically due to high oil pressure * The IDG is disconnected manually with the drive disconnect switch * The engine is not running.
What is the purpose of generator in aircraft?
A generator, produces electrical power when the aircraft battery is completely discharged, because a generator creates a portion of its output (because of residual magnetism) from the wire-through-magnetic-field interaction that produces power.
How is voltage on a DC generator controlled?
The voltage of a separately-excited DC generator can be controlled by controlling generator speed, by using a variable field supply, or by a combination of both. A self-excited dc generator can be controlled by generator speed or by a rheostat or electronic circuit that reduces the field current.
When you press the disconnect button (the red arrow), the disconnect circuit is completed and the solenoid pulls the pin out of the pinion shaft (the blue arrow) which then engages the worm gear on the drive shaft (the green arrow) and causes that gear to disengage from the drive mechanism. This causes the generator to stop turning.
What is an abnormal procedure from a Boeing 747?
From the Boeing 747-400 Abnormal Procedure Checklists Word Doc : Condition: Low IDG oil pressure or high IDG oil temperature. Affected GENERATOR DRIVE DISCONNECT switch PUSH.
What causes a pawl to disengage from the engine?
This allows a spring-driven pawl to engage a worm gear on the drive input shaft. This causes the inner input shaft to disengage from the engine drive. Thus the generator drive rapidly coasts to a stop. What benefit does it have to be not able to engage them again?
How is the integrated drive generator connected to the engine?
This button mechanically disconnects the Integrated Drive Generator (IDG), a generator for providing electricity, from the engine. The button above it disconnects the IDG electrically from the buses, but keep the IDG connected to the engine (so it is spinning as the engine spins).