Turboshaft Flashcards
What is a turbo shaft engine
GTE that delivers power through a shaft to operate anything but a propeller
What are turboshaft engines primarily designed to do
Produce shaft horse power
Are turboshaft engines designed to produce thrust
No
What is a twin pack
Helicopters with a combination of two pt6 engines
What type of coupling is used and why
Universal joins connection to ensure adequate movement of transmission
What is a way of inlet protection
Particle separator can be fitted as an option on the inlet of the engine
What principle do particle separators work on
Centrifugal force
How are particles thrown overboard in a particle separator
Compressor bleed air used to scavenge particles overboard
What are drive systems used for
Transfer power produced within engine to the compartments it must drive
How is engine output rpm reduced
Reduction gear box
Why is engine output reduced
Due to rotational speeds required to operate engine efficiency
What form is the free wheel unit
Sprag clutch
What does a free-wheel unit do
Prevents one engine from driving the other by automatically disconnecting from the slower one
What happens in auto rotation
Both units disengaged preventing the main motor from driving the engines
Why is an output shaft required from the engine gear box
Allows the engine to drive the main rotor gearbox
