15.17 turboshaft engine

Question 1

what is the main function of turboshaft engines?

Answer 1

produce shaft power

Question 2

what are the two main assemblies in turboshaft engines?

Answer 2

gas generator
power section

Question 3

what does the power section consist of?

Answer 3

additional turbines
a gear reduction system
shaft output

Question 4

where are turboshaft engine typically used?

Answer 4

Helicopters
APU

Question 5

what is the function of the drive system?

Answer 5

to transfer the generated power to the components that are connected

Question 6

how is engine RPM usually adjusted to drive components?

Answer 6

a reduction gearbox, usually then on to a main rotor gear box to further reduce

Question 7

what is used to prevent one engine driving another in a system where there is more than one engine?

Answer 7

a free wheel system automatically disconnects the slower engine

Question 8

what is the function of a universal joint?

Answer 8

it ensures that the alignment from the engine to what it is driving absorbs low amplitude oscillation as well as torque reaction

Question 9

what is the purpose of couplings?

Answer 9

ensures adequate movement of the transmission an take place

Question 10

what is the fail safe on the coupling?

Answer 10

it will show gradual and visible damage

Question 11

what are the typical selections available in FADEC engines?

Answer 11

off -when an abnormality is seen in start up or flight
idle
flight -run at full speed