General Electric T700-GE-401

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About the T700-GE-401:

The General Electric T700 is one of the most successful turboshaft engines ever built. Since the first T700 (the T700-GE-700) entered production in 1978, the engine has accumulated more than 50 million flight operating hours. With an installed inventory of more than 11,000, the General Electric T700 turboshaft and turboprop engines are the most widely used in their class. Also, the General Electric T700 provides great reliability and maintainability. The engine has proven itself in battle, extreme environments, and in commercial service. T700 engines currently power 25 types of civil and military helicopters as well as regional jets, military transport aircraft, and special-mission aircraft.

The General Electric T700-GE-401 was the first engine qualified under the rigorous U.S. Navy salt ingestion tests, where it proved its suitability for naval operation. Originally chosen for the SH-60 Seahawk, the T700-GE-401 remains in production for Kaman's SH-2G Super Seasprite helicopter. Furthermore, the 401 is the chosen powerplant for the U.S. Marines Corps' upgrade program for the UH-1Y Venom utility helicopter.

The T700-GE-401C is a more powerful variant of the original 401. It powers the AH-1Z Viper attack helicopter and the UH-1Y Venom utility helicopter.

The U.S. Marine Corps is currently upgrading its fleet of UH-1N Huey helicopters to the UH-1Y Venom configuration. One of the key upgrades is to replace the older Pratt & Whitney Canada T400-CP-400 engines with new T700-401C turboshaft engines. These will be equipped with a four-blade rotor, an improved tail rotor, as well as an increased-rating transmission.

U.S. Marine Corps AH-1W Super Cobra helicopters will be upgraded to the AH-1Z Viper configuration and will, as the UH-1N, receive new T700-401C turboshaft engines.

For information about General Electric T700-GE-701C/D engines (other engines in the T700 family) featured on the latest MH-60R/S Sea Hawk, HH-60G Pave Hawk, UH-60 Black Hawk, and AH-64 Apache: Click Here!

Sources Used: U.S. Department of Defense (DoD) and General Electric Co.

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Engine Type:

Turboshaft Engine


AH-1Z-Viper; UH-1Y Venom
SH-2G Super Seasprite;
SH-60B Seahawk; HH-60J Jayhawk


In Production


General Electric Co.

Price/Unit Cost:

T700-GE-401C: $676,610

General Electric F414-GE-400 Turbofan Engine

By Joakim Kasper Oestergaard Balle /// Contact Forecast International

External Resources:

GE Aviation: General Electric T700

YouTube: T700-GE-401 on YouTube

Fact Sheet: General Electric T700-GE-401C/-701C


Engine Specifications: General Electric T700-GE-401/401C

Manufacturer: General Electric Co.
Power: Up to 1,890 shp (1,410 kW)
Overall Pressure Ratio at Maximum Power: Unknown
Compressor Stages: 6
HP-LP Turbine Stages: 2-2
Length: 46 in (7.17 m)
Diameter: 15.6 in (39.6 cm)
Dry Weight: 458 lbs (208 kg)
T700-GE-401: SH-2G Super Seasprite
T700-GE-401C: AH-1Z Viper; UH-1Y Venom; HH-60J Jayhawk; SH-60B Seahawk
Price/Unit Cost:
T700-GE-401: $696,230
T700-GE-401C: $676,610
First Run: 1973 (initial T700)
First Flight: Unknown

Engine Program

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Aviation Gas Turbine Engines
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