Williams F107

The Williams F107 (company designation WR19) is a small turbofan engine made by Williams International. The F107 was designed to propel cruise missiles. It has been used as the powerplant for the AGM-86 ALCM, and BGM-109 Tomahawk, as well as the experimental Kaman KSA-100 SAVER and Williams X-Jet flying platform.

Applications

AGM-86 ALCM
BGM-109 Tomahawk
AGM-158 JASSM
Kaman KSA-100 SAVER
Williams X-Jet
Bell Aerospace Flying Jet Belt
Dynetics Gremlins X-61

Specifications (WR19)

Data from Aircraft engines of the World 1970

General characteristics

Type: Turbofan
Length: 24 in (610 mm)
Diameter: 12 in (300 mm)
Dry weight: 67 lb (30 kg)

Components

Compressor: 2-stage fan, 2-stage axial IP compressor, 1-stage centrifugal HP compressor
Combustors: Annular combustion chamber
Turbine: 1-stage HP turbine, 2-stage LP turbine
Fuel type: JP-4 / JP-5 / JP-10
Oil system: Pressure system with return

Performance

Maximum thrust: 430 lbf (1.9 kN) Maximum continuous power

F107-WR-400 610 lbf (2.7 kN)

F107-WR-402 700 lbf (3.1 kN)

F107-WR-105/401 1,400 lbf (6.22 kN)

Overall pressure ratio: 13.8:1
Bypass ratio: 1:1
Specific fuel consumption: 0.683 lb/lbf/h (69.6 kg/kN/h)
Thrust-to-weight ratio: 6.42

F122

The Williams International F122 is a twin-shaft, axial-centrifugal-flow turbofan that is similar to the F107 in configuration but has a maximum thrust of 900 lbf (3.33 to 4.0 kN).

Design and development

The F122 is used to power the KEPD 350 air-launched cruise missile, and was the powerplant for the cancelled AGM-137 TSSAM air-launched cruise missile. Although the AGM-137 was cancelled, the F122 was first used for the Taurus KEPD when it was flown aboard that missile in April 2002.