Dry Start:
Fuel fails to flow to the engine
Hung Start:
The engine lights up, but fails to accelerate properly
Hot Start:
Light up is followed by a very rapid rise in EGT
Wet Start:
The engine fails to light up, RPM stabilises at a low value (must do a dry run or blow-out before attempting a restart)
F(I)RE warning / Engine warning:
H(I)GH pressure
ERR(O)R /Fault warning:
L(O)W pressure
Output
Resistance Capacity
NORM
high Resistance - low Capacity
FAULT
low Resistance - low Capacity
FIRE
low Resistance - high Capacity
External gearbox =
= auxiliary gearbox = HP compressor engine
Supplemental gearbox =
= second gearbox = LP compressor
If the fire detector is brocken?
Fault warning & low pressure
Power output for Piston Engine?
1: Taco (Takeoff)
2: People (power)
3: Eat (Economy Rich)
4: Tacos (Theoretical Chemical Correct)
5: Everyday (Economy Lean)
turbocharger
—> driven by turbine in the exhaust gases
supercharger
—> driven by crankshaft via gears
Fail safe
= Redundancy
Safe life
= Replacement (hard time) cycles, hours
On condition
= Monitoring
Damage tolerance
= Capability
Non Return Valve (NRV):
-> allows in one direction, prevent other
Restrictor Valve
-> allows in one direction, reduce other
Compressor:
Rotor : convergent
Stator : divergent
Turbine:
Rotors: divergent
Stator: convergent
