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CTS800 Turboshaft Engine

CTS800 Turboshaft Engine

Originally designed for the U.S. Army, its high power-to-weight ratio, simple design and lowest specific fuel consumption (SFC) in its power class quickly gained popularity and led to the introduction of a commercial turboshaft variation - the CTS800.

Simple Design Drives Efficiency

The next-generation CTS800 turboshaft family of engines was developed by the Light Helicopter Turbine Engine Company (LHTEC), a 50:50 partnership between Rolls-Royce and Honeywell. It has the highest power-to-weight ratio and lowest specific fuel consumption (SFC) in its class. Weighing in at only 375 pounds, it allows for a max takeoff weight of over 11,000 pounds.

The CTS800 engine features a modular design with dual shafts, two-stage centrifugal compressor, annular combustor, two-stage high pressure (HP) and two-stage power turbine. All models are equipped with an inlet particle separator module. Many applications require the incorporation of an output speed reduction gearbox (RGB). All models are controlled by an advanced, highly-redundant, dual channel full authority digital engine control (FADEC) system.

And with 100% FADEC control and on-condition maintenance, the CTS800 reduces pilot workload and improves the overall cost of ownership. It is also FAA certified and EASA validated and is in service with armed forces around the world. The highly reliable and maintainable CTS800 principal engine design was originally developed to power the U.S. Army's Boeing Sikorsky RAH-66 Comanche helicopter.

Turboshaft Comparison

Model Engine Type Market Length
Takeoff Power
(Sea Level, SHP)
Output Shaft Speed
LTS101-700D-2 Turboshaft Commercial Helicopter 31.6/80.2 24.8/63 732 37000
Turboshaft Commercial Helicopter 31.1/78.9 25.4/64.4 780 36281
Turboshaft Commercial Helicopter 36.3/92.2 25.5/64.7 820 6317
T53 Turboshaft Commercial and Military Helicopters 47.6/120.9 24.5/62.2 1500 6461
Turboshaft Military Helicopters 48.1/122.2 28.7/72.9 1361 6402
Turboshaft Military Helicopters 34.0/86.4 28.7/72.9 1373 23000
Turboshaft Military Helicopters 47.1/119.6 24.3/61.6 4777 15066
Turboshaft Military Helicopters 47.1/119.6 24.3/61.6 4777 15066
AGT1500 Turboshaft Battle Tank  66.5/168.9 31.8/80.8 1500 3000

CM = Centimeter
RPM = Revolutions Per Minute
SHP = Shaft Horsepower

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