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Model 250
Total Production: 30,000
Model 250-B17F
Production: 1,200
Also Known As
Model 250-B17D
Origin
United States of America
Contractor/s
Rolls-Royce
Family Members
Model 250
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Description:
The Rolls-Royce/Allison Model 250 is a compact turboshaft engine designed to power both civil and military helicopters. Developing between 420 and 715 shat-horse-power and featuring a two-shaft modular design. It was originally developed as the T63 to meet the requirements of the US Army for a small turboshaft engine. Rolls-Royce has delivered nearly 30,000 Model 250 engines which have logged over 160 million flight hours. Currently, there are 16,000 Model 250 engines in service. Rolls-Royce has developed turboprop, generators and turbojet applications based on the Model 250 design.
The Rolls-Royce Model 250 turboprop variant is a small and compact engine developing between 300 and 450 shaft-horsepower (shp). Over 1,200 engines produced accumulating five million flight hours to date. This engine has been provided to 63 turboprop aircraft types including : Extra EA-500, Fuji T-7, Grob G140TP, Schweizer RU-38B and the Enaer T-35 Turbo Pillan. The latest version 250-B17F is a derivative of 250-C20R+ turboshaft developing up to 450-shp.
Specifications
Weights: Dry Weight 205 lb (93 kg)
Power: Cruise Power 380 shp, Max Power at TakeOff 450 shp
Other: Fan Pressure Ratio 8
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Notes
(*) lead contractor
IOC: Initial Operating Capability
FOC: Full Operating Capability
CEP: Circular Error Probable
Comm: Commissioning Date
Meters (m) Kilometers (km) Nautic Miles (nm) Inch (in) Yard (yd) Foot (ft) Millimeter (mm)
Pound (lb) Kilogram (kg) kN (KiloNewton) Ton (t)
Meters per Second (mps) Kilometers per Hour (kph) Knot (kt) Miles per Hour (mph)
Liter (l) Galon (gl)
Year (yr) Minutes (min) Second (sec)
Shaft-Horse-Power (shp)
Last Updated: Saturday, November 22, 2008
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