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Allison
Model T63-A-700(250-C18) Gas Turbine Engine |
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Model and type
T63-A-700. Turboshaft, 2-shaft, 6-'stage axial and 1-stage centrifugal compressor, 1
combustion chamber, 2-stage gas generator turbine, 2-stage free power turbine.
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Intake
1-piece steel air intake casing. hot bleed air anti-icing.
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Compressor
2-piece steel axial casing with 6 row of stator blades, bolted to magnesium alloy
centrifugal diffuser. Pressure ratio 6.2:1. Air flow 3.0 Ib/sec/51,600 rpm.
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Combustor
Reverse flow combustion chamber. 1 dual fuel nozzle.
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Turbine
Steel casing with hollow nozzle vanes. 1st and 2nd-stage (gas generator) turbine wheels,
Maximum inlet temperature 1,825 F (996C).
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Turbine
3rd and 4th-stage free turbine wheels integral shrouded blades, (power) attached to home
gear train pinion and reduction gear |
Exhaust
Fixed area dual ducts, with 40o upward exhaust. |
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Power take-off
Offset-down reduction gearbox, ratio 0.171:1(5.83:1). Output shafts with Internal splines
at front and rear, 6,000 rpm |
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Control system Pneumatic-mechanical. Gas
generator governor. Acceleration control. Power turbine governor. Torquemeter. Constant
speed. |
Fuel system
1 pesco fuel pump 600psi, with integral filter. Bendix control |
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Ignition system
Bendix high-energy ignition. 1 igniter. |
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Lubrication
Return system, 120 psi. |
Starter
Electric starter-generator. |
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Width and height
19.0 in and 22.5 in |
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Length and frontal area
40.8 in and 1.9 ft |
Weight; power/weight
136 Ib; 2.33 shp/Ib |
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Fuel specification
JP-4 or JP-5 |
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Fuel consumption
0.70lb/shp/hr |
Oil spec; consumption
MIL-L-7808: 0.05 Ib/hr |
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Rating
317 shp at 35,000 power turbine rpm. |
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