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Allison T63/Model 250

The Engine Specifications (early)
 
The Allison Model 250 is the world's most successful small gas turbine small engine.  Designed for 250 hp and first flown in 1961, most manufacturers at the time expected piston engines to fill this market.  The U.S. military designation for this engine is the T63.

Now built by Rolls-Royce, over 28,000 T63/250s have been produced.

Turboprop/Turboshaft
Compressor: 6-stage axial + 1 centrifugal
Turbine: 2-stage gas-generator/
2-stage power
Mass flow: 3.1 lbs/sec
Pressure ratio: 6.3
 
Models Used by
 
250-B17B: 400 hp (298 kW)
250-B17C: 420 hp (313 kW)
250-C20B: 420 hp (313 kW)
Bell 206 JetRanger
G.A.F. Nomad
Hughes OH-6 Cayuse
SIAI Marchetti S.M.1019
 
Related Pages
 
More about Allison
More about Rolls-Royce
 

page updated 23 August 2004

 

 

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Kenneth W Shanaberger 2000 - 2010