15.7 TURBOSHAFT ENGINES👌🏼 Flashcards
1
Q
What does turbo shaft produce
A
Shaft power to drive machinery instead of producing thrust
2
Q
What is the turboshaft engine output measured in
A
Shaft horse power (SHP)
3
Q
Turboshaft can be made up of 2 major components which are
A
- gas generator
- and power section
4
Q
What does the gas generator do
A
Relates hot expanding gases to drive power section
5
Q
Where are turboshaft engines commonly used
A
- helicopter, APU etc
- requires self sustained high power output, high reliability, small size, lightweight etc
6
Q
In Arriel 2c engine where and how is the reduction of engine RPM done
A
- done at rear of engine
- where the power turbine drives reduction gearbox
7
Q
Explain drive systems
A
- to transfer power produced within engine to the components it must drive
8
Q
To allow engine to drive the main rotor gearbox what is required
A
Output shaft is required from the engine gearbox
9
Q
What is fitted to prevent one engine from driving the other
A
- freewheel unit is fitted which automatically disconnects the slower engine
- freewheel unit is usually in the form of a sprag clutch
10
Q
What is the reason for a universal joint connection
A
- ensure adequate movement of the transmission can take place
11
Q
Are shaft couplings fail-safe
A
True
