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T700 ENGINE. T700 ENGINE – LEFT HAND SIDE. ACTUATOR/CRANKSHAFT ASSEMBLY FOR VARIABLE GEOMETRY SYSTEM. AISBV Actuates automatically to provide bleed functions at approx 88-92% Ng or 30% Tq Will open below 88-92% Ng and close above. IPS. THERMO-COUPLE HARNESS (TGT). FUEL INJECTORS(12).

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T700 ENGINE – LEFT HAND SIDE

ACTUATOR/CRANKSHAFT ASSEMBLY FOR VARIABLE GEOMETRY SYSTEM

  • AISBV
  • Actuates automatically to provide bleed functions at approx 88-92% Ng or 30% Tq
  • Will open below 88-92% Ng and close above

IPS

THERMO-COUPLE HARNESS (TGT)

FUEL INJECTORS(12)

IGNITORS(2)

FRONT

Eng Inlet

Anti Ice Port

Eng Anti-Ice

  • ECU:
  • Np Governing to maintain constant Power Turbine and Rotor RPM
  • Load Share Comparator(keeps tq within 5% by adjust low eng Np up to 3%
  • TGT Limit Amplifier(limits TGT to 834-852 deg), inop during Eng Start, Lockout, Compressor Stall and Alternator Failure
  • Tq Motor Amplifier – actuates Tq Motor in HMU to bias metering valve and also receives feedback signal from Linear Variable Differential Transducer in HMU
  • NpOverspeed Switch to actuate Overspeed Solenoid – backup power from AC Primary Bus
  • History Recorder – records TGT and Ng and is used to track life of GG and IPS (backup power from AC Primary Bus)
  • Conditioning and Transfer to cockpit of Tq and Np Signals.
  • Np Reference for Np Trim Switch 96-101% with Pilot Side having authority

Np SENSOR

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OIL PUMP

  • 6 Scavenge Elements
  • 1 Pressure Element

OIL FILTER BYPASS SWITCH( >80 PSI)

  • OIL FILTER
  • *44-60PSI filter button pops
  • 60-80PSI = light in cockpit
  • >80PSI will actually bypass

* Oil Filter Impending Bypass button deactivated below 38 deg)

  • OIL TEMP/ PRESSURE SENSE (NOT VISIBLE)
  • Pressure Light on at 20 PSI
  • Temp Light on at 150 deg C

COLD OIL RELIEF

Filter Cooler

CHIP DETECTOR (OIL)

- no Fuzz burn

4. OIL COOLER

  • ALTERNATOR
  • -1 Winding for Ng Signal
  • 1 Winding for ECU Power
  • 1 Winding for Engine Ignition

FUEL FILTER BYPASS SWITCH(18-22 PSI)

  • HISTORY DATA RECORDER
  • Records TGT and Ng.
  • Backup power from AC Primary Bus

1. ENG DRIVEN FUEL PUMP(45-90 PSI)

2. FUEL FILTER

GREEN – Engine to airframe interface

BLUE – Np Overspeed and Tq Indication systems

YELLOW – Engine Electrical Functions

BLACK – Engine Ignition

5TH STAGE AIR FOR ENG ANTI - ICE

SWIRL FRAME

-Initial Stage of air purification

RIGHT

LEFT

  • ENGINE FUEL FLOW
  • 1 Eng Driven Fuel Pump
  • 2 Fuel Filter
  • 3 HMU(next page)
  • 4 Liquid to Liquid Oil Cooler
  • 5 POU(next page)

T700 ENGINE – FRONT VIEW

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IPS

  • Swirl Frame on eng inlet directs contaminated air to outside of eng inlet. 85% of inlet air travels direct to compressor. Other 15%(dirty) is directed to IPS.
  • Use centrifugal force to separate heavy, contaminated particles. Dirty Air dumped overboard.
  • Mechanically driven by AGB
  • Not effective at low Ng or on Sheet Ice Shed from Windshield due to Ady Qualities of the ice.
  • 3. HMU
  • Pumps Fuel via high pressure Vane Pump(400-832 PSI)
  • Meters Fuel via PAS, LDS and ECU. ECU inputs actioned by Tq Motor inside HMU)
  • Controls VG and VIGV’s via Actuator Shaft
  • Controls AISBV via Actuator Shaft
  • Limits Accel and Decel of engine to prevent Compressor Stall/Flameout
  • Controls Vapor Vent for Manual Fuel Prime
  • Allows PAS over-ride by mechanically passing all Tq Motor Inputs when PCL advanced full forward ie ECU Lockout

PNEUMATIC STARTER

-30,000 rpm at max Ng

-Driven by APU, Other Engine or Ext Source.

- Eng Start Valves air actuated, elec controlled

  • 5. POU
  • Meters Start Fuel (outlet to Start Fuel Manifold and 2 primer nozzles)
  • Meters Main Fuel Flow(outlet to main fuel manifold and 12 injectors)
  • Purges(via P3 air) Start, Main fuel manifolds as well as injectors and primers(outlet overboard)
  • On command from ECU limits fuel flow to prevent Np Overspeed(106+/-1%)
  • PAS
  • Sets max pwr avail sched.
  • Set max pwr limits that may never be exceeded by Collective.
  • LDS
  • Adjust Load Demand schedule.
  • Adjusts fuel flow simultaneously with Coll

TQ and O/S SENSOR

-sends signal to ECU for conditioning then to SDC and cockpit

-O/S signal used by ECU to adjust POU

Np SENSOR

-sends signal to ECU for conditioning then to SDC and cockpit

LEFT

RIGHT

T700 ENGINE – REAR VIEW

slide5

TGT (T4.5) Thermocouples(7)

0-775 Deg C Normal

775-850 Deg 30 min Limit

850 deg – Start Abort

850 – 886 deg 12 Sec Limit

  • Centrifugal Compressor
  • Single Stage - 5th Stage Air(P3)
  • air for AISBV
  • air for Eng Inlet Anti Ice
  • Air for Pneumatic Manifold(X-bleed Start)
  • Air for purging
  • Air for Cockpit Heat and ERFS
  • Pneumatic Starter
  • for X-bleed start must have min 90%Ng, 100%Np and Eng Anti Ice Light Off.
  • At least 60 sec b/n each start cycle
  • 15 deg C and below
  • 2 consecutive start followed by 3 min rest then 2 addn starts followed by 30 mins
  • Above 15 deg C
  • -2 consecutive start cycles followed by 30 min rest
  • COMBUSTION LINER
  • 12 FUEL INJECTORS
  • 2 PRIMER NOZZLES
  • 2 IGNITORS

PAS

LDS

FRONT

REAR

TQ Sensor

0 –100% Dual Cont

0 – 110% Single Cont

100-125% Dual 12 Sec Transient

110-135% Single 12 Sec Transient

NpOverspeed Sensor

– 106+/-1%

Np Turbine

Min 91% except idle/transient

95-101% Cont

101-105% Transient

105-107% 12 Sec Transient

(avoid 20-40 and 60-90%)

-2 STAGE

-100% = 20900RPM

-Uses 25% of combustion energy

NG Turbine

0-99% Cont

99-102% 30 min

102-105% 12 sec

-2 STAGE

-29000 (idle 63%) –44700 RPM (100%)

-Uses 75% of combustion energy

  • Axial Compressor
  • -5 STAGE
  • Comp Ratio of Axial Comp 7:1
  • Comp ratio of both Axial and Centr 17:1

T700 ENGINE(1546 SHP) – RIGHT HAND SIDE