Power Plant Flashcards
1
Q
What engines does the BE99 have?
A
PT6A-27/27
Free turbine annual combustion
Reverse flow
2
Q
How much air is ignited in the air
A
About 25%
75% is used for for cooling and centering the flame
3
Q
How many igniters are there?
A
14 total
8 primary
6 secondary
4
Q
What does the compressor bleed valve do
A
Vents extra air overboard from p2.5 to prevent compressor stalls
5
Q
What happens if bleed valve gets stuck open or closed
A
Stuck open - drop in torque high temps
Stuck closed - at low rpms chance of compressor stalls
6
Q
When does the starter turn off
A
When the switch is turned off
7
Q
What is the limitations with auto ignitions?
A
Must be in above 14000 during icing conditions and or at night
