EXAM NOTES Flashcards
(32 cards)
start the engine
Radial Drive Shaft
How to start a turbine engine
- introduction of air (rotate the starter)
- Igniters
- Fuel
How to start the compressor:
Starters
- Electric
- Pneumatic
- Hydraulic
- Catridge Type
- Combustion Starting
- Isopropyl Nitrate
pneumatic & electric enters in bleed air
Auxiliary Power Unit (APU)
Main Parts of Ignition System
- Igniter Plugs
- Exciter Box
- High Tension Leads/ Wire
(?) timing of Ignition/ Start because it is continuous combustion in turbine.
No
2 Types of Fuel Introduction
- Direct Injection
- Pre-vaporization
3 False Start
- Hot Start
- Hung Start
- No Start
too rich of mixture/ fuel
Hot Start
Need to do if Hot Start
need to turn off the engine, motoring the air (off the igniters)
disengage early/ starter disconnected early
Hung Start
Need to if Hung Start
need to be rich or rise the fuel
-no ignition and combustion
-no EGT, no fuel supply
No Start
give back the loss thrust
Thrust Restoration
Ways of Thrust Restoration
Water Injection and Methanol
Other term of thrust augmentation
Afterburner
use for takeoff of jets and more power that produced in small runway
Afterburner / Thrust Augmentation
use during landing ig the runway is slippery
Thrust Reverser
3 Types of Thrust Reverser
- Bucket Target/ Bucket Door
- Clamshell Door
- Cascading Vanes/ Blocker Door
- hydraulically actuated and uses bucket-type doors to reverse the hot gas stream
- more on turbojets
Bucket Target / Bucket Door
are operated by pneumatic rams through levers that
give the maximum load to the doors in the forward thrust position; this
ensures effective sealing at the door edges, so preventing gas leakage.
Clamshell Door
- is ‘open’ because the cascade vanes are internally covered by the
blocker doors (flaps) and externally by the movable (translating) cowl;
the latter item also serves to reduce drag - more on turbofan engines
Cascading Vanes/ Blocker Door
to switch the thrust reversers
WOW switch
location of wow switch
main landing gear
