The T700 is the most-produced turboshaft in the Western world, and the -701D variant represents its mature military standard. Two T700s give the Black Hawk its lift and the Apache its agility—a dual-installation design that demands each engine be reliable enough that a single failure is survivable.
T700-GE-701D Architecture
The primary subject of this technical guide focuses on the General Electric T700-GE-701D engine, engineered specifically for Turboshaft applications. Below is an essential digest of this powertrain configuration.
• 1,994 shp turboshaft
• Powers UH-60M and AH-64E
• Dual-channel FADEC
• Modular line-replaceable design
T700-GE-701D Data Sheet
Single-spool gas generator with free power turbine; approximately 1,994 shp; modular design with line-replaceable units; dry weight roughly 450 lb.
The T700’s modular architecture lets maintainers swap the compressor, combustor, or power turbine section without removing the whole engine from the airframe—a logistics advantage in combat zones. The -701D specifically added a more durable compressor and improved hot-section materials for operation in dusty, high-temperature environments. Its dual-channel FADEC manages fuel flow and monitors engine health in real time.
| Type | Turboshaft, free power turbine |
|---|---|
| Power | ~1,994 shp |
| Configuration | Single-spool gas generator |
| Control | Dual-channel FADEC |
| Weight | ~450 lb |
| Fuel | JP-8 / Jet A-1 |
Aircraft Powered by the T700-GE-701D
This engine model is deployed across various operational frameworks. Here is a breakdown of the typical machine or vehicle applications using this unit:
Sikorsky UH-60M Black Hawk, Boeing AH-64D/E Apache
Pros & Advantages
Modular maintenance; FADEC control; proven in combat environments; dual-installation survivability.
Cons & Disadvantages
Power limited compared to newer turboshafts; hot-section life sensitive to dust ingestion.
Frequently Asked Questions (FAQs)
Q1: What is a turboshaft engine?
A1: A turboshaft delivers power through a shaft rather than exhaust thrust. The T700’s free power turbine drives the helicopter rotor through a gearbox.
Q2: What aircraft use the T700-GE-701D?
A2: The UH-60M Black Hawk and AH-64D/E Apache are the primary applications, with several other military rotorcraft using T700 variants.
Q3: Why is the T700 so widely used?
A3: Its modular design, FADEC control, and proven reliability in combat made it the default Western military turboshaft.
JP-8 in military service, with Jet A-1 compatibility for commercial operators.