M15.19 Powerplant Installation Flashcards
What divides power plants into cooling zones
Fireproof bulkheads (fire seals)
What provides engine aerodynamic smoothness
Nacelle
Why angles can fan cowls be opened to
40 or 55 degrees
What is the thrust reverse cowling mainly constructed of
- Steel
- Titanium
What does cowl load sharing use to give good contact to the engine fan frame
V-shaped grooves and blades
The fan thrust reverser cowling had what passive fire protection features
- Fire protective coating on the inner side
- Fire seal on the connection to the fan frame
What is the fire seal made from
Titanium with a fire resistant silicon
Exhaust nozzle components
- Centre body
- Exhaust sleeve
How many mounts do engines have
2 (1 fwd 1 aft)
Main loads acting on an engine
- Weight
- Thrust
- Side loads
- Additional loads produced by flight
Which engine mounts transmit weight loads
Both
What engine mounts transfer axial (Thrust) loads
FWD
Which engine mounts transmit lateral loads
Both
Why does only the FWD engine mount transfer axial loads
For thermal expansion, must not put load onto the mounts
How far are engine looms tied
2 inch intervals with ties no more than 1 inch either side of any breakout
