Friday, August 29, 2008

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Model 250

Total Production: 30,000

Production: 29,000

Also Known As: Allison 250, Model 250-C20, Model 250-C20R, Model 250-C20W (version powering the Fire Scout UAV), Model 250-C30, Model 250-C40, Model 250-C47, T63 (US Army original designation), T703 (military designation for OH-58)

Origin:United States of America

Contractor/s: Rolls-Royce

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.

Currently, the Model 250 is available in Series II and Series IV both equipped with FADEC (Full Authority Digital Engine Control) control. The Series II Model 250-C20 engine powers the Bell 206B, TH-67, MD-500, MD520N, AS355 and BO105 helicopters. The Model 250-C20R is an improved version featuring enhanced performance and economy. Series IV turboshafts (Model 250-C30/C40/C47) provide up to 715-shp and power the Bell 206L, Bell 407, Bell 430, MD530 and MD600N helicopters. The OH-58D, AH/MH-6, RQ-8 Fire Scout, Ka-226, PZL SW-4 and Groen Brothers Aviation Hawk 4T aircraft are powered by Model 250 engines.

Specifications
Dimensions: Diameter 21.90 in 250-C30R; 19-in 250-C20B, Length 41 in 250-C30R; 38.8-in 250-C20B

Weights: Dry Weight 274 lb (124 kg) 250-C30R; 158-lb 250-C20B

Power: Cruise Power 600 shp, Max Output Power 650 shp 250-C30R; 420-shp 250-C20B

Other: Fan Pressure Ratio 9 250-C30R; 7.2 250-C20B

Family Members:
Model 250-B17F Applications
AS355 Ecureuil, Bell 206, Bell 407, Bell 430, BO 105, Enstrom 480, Ka-226, MD-500, MD-600, MQ-8B Fire Scout, OH-58D Kiowa Warrior, RQ-8A Fire Scout, Schweizer 333 News

 

Operators

see operators map

Albania
Argentina
Australia
Austria
Bahrain
Bangladesh
Bolivia
Brazil
Brunei Darussalam
Burma
Cameroon
Canada
Chile
Colombia
Costa Rica
Cote d'Ivoire
Cyprus
Dominican Republic
Ecuador
El Salvador
Finland
France
Germany
Greece
Guatemala
Guyana
Indonesia
Iraq
Ireland
Israel
Italy
Japan
Jordan
Kenya
Malaysia
Mauritania
Mauritius
Mexico
Netherlands
Nigeria
Pakistan
Peru
Philippines
Russia
Saudi Arabia
Sierra Leone
South Korea
Spain
Sri Lanka
Sweden
Switzerland
Taiwan
Thailand
Trinidad and Tobago
Turkey
United Arab Emirates
United Kingdom
United States of America
Venezuela

Internet Resources
rolls-royce.com, rolls-royce.com

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: Sunday, August 24, 2008

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