Power Plant Flashcards
What are the F100 Engines?
Rolls Royce Tay 650-15
Also
Rolls Royce Tay 620
Tay 650-15 thrust
15,100 lbs, flat rated at ISA + 15
LP Spool
Single stage Fan
3 stage IP Compressor
3 stage LP turbine
RPM = N1
HP spool
12 stage HP compressor
2 stage HP turbine
RPM = N2
Gearboxes
HP shaft drives high speed gearbox
LP shaft drives low speed gearbox
High speed gearbox drives …?
Hydraulic pumps
Fuel pump
Oil pump
IDG
Fuel flow regulator
N2 tachometer generator
Low speed gearbox drives …?
N1 tachometer generator
Shaft governor
Fan output
3/4 bypass engine core
1/4 enters engine core
Bleed air ducts
7th and 12th stages
Combustion section
10 chambers in annular casing
Igniter plugs
2 plugs in chambers 4 and 8
Engine oil system
Self contained in oil tank on lower left side
Single pressure pump from HP gearbox
Fuel cooled oil cooler
Temp bulb and pressure filter
5 scavenge pumps return oil to tank
Passes through magnetic chip detector and filter
Engine fuel system
LP fuel pump - high speed gearbox
Passes through engine and IDG oil coolers - prevent ice in fuel
Passes through fuel flow sensors
Filter
HP fuel pump - high speed gearbox
Output governed by fuel flow regulator - According to TLA
Shut off valves - fuel levers on pedestal
Engine Multiplexers - EMUX
Dual channel - allows cross referencing for accuracy
Sends engine data to:
- AF AS
- FWC
- MFDS
- single channel fault indicated on MFDS
MFDU engine data
Left MFDU - primary page
Right MFDU - secondary page
Primary Page
EPR
TGT
N1
N2
Thrust rating - TOGA, FLEX, CLB, CRZ, MCT
TAT & SAT
Secondary page
Oil pressure! Temperature, quantity
Engine vibration
Fu3l temperature, flow, fuel used
Standby engine indicator (SEI)
Connected directly to the engine - analogue signals
N1 red limit marker position
95.5 %
Standby engine indicator displayed parameters
N1
N2
TGT
EPR
Red limit on oil pressure indicator
Diaries with N2
Purpose of fuel flow regulator
To meter the fuel to the combustion chambers
When starting the engine, the fuel lever should be moved to the OPEN position at…..?
15% N2 with N1 rotation
Moving the fuel lever to the open position will …….?
Open the HP fuel valve and start the ignition operating
The fuel used indication on the MFDU secondary page will reset to zero when…….?
The engine is started on the ground
If an MFDU primary page parameter fails what will happen?
The tape will display INOP with dashes for the numerals
The limitations on use of the starter motor are …..?
4 attempts - max 2 min each
30 second rundown between attempts
After 4th attempt 15 minutes cooling
EMUX vs EFSU
