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Williams F112



The Williams F112 is a small turbofan engine made by Williams International designed to power cruise missiles. It has been used as the powerplant for the AGM-129 Advanced Cruise Missile and the AGM-86B advanced cruise missile, as well as the experimental X-36 and X-50.

Although Williams originally designed these small turbofans to power target drones while aiming for a contract in the Subsonic Cruise Armed Decoy (SCAD) program, it quickly became apparent that these were valuable tools to be used in the future to power advanced cruise missiles. Originally designated the F107-WR-14A6, then designated the F107-WR-103 by Williams then designated the F112-WR-100 by the USAF.

Though the true benefits that the F112 brought to the AGM-129 are classified, it has been said that the F112 increased the range of the AGM-129 to four times that of the AGM-86B. Another benefit is that the infrared heat signature has also been reduced or nearly eliminated, aiding the stealthiness of the AGM-129. This was accomplished with the use of high tech materials and coatings.


Boeing X-50
McDonnell Douglas X-36


Type: Twin-spool counter rotating turbofan
Length: 29.5 in.
Diameter: 12 in. (at widest point)
Dry weight: 161 lb (99 lbs without accessories)
Compressor: centrifugal
Combustors: annular
Turbine: axial
Fuel type: heavy fuel Boron-Slurry (aka JP-10)
Oil system: self contained 1.3 pints (0.61 liters)
Maximum thrust: 1000 lb
Overall pressure ratio: 30:1
Bypass ratio: 1:1
Turbine inlet temperature: TIT 2000 degs F (1093 degs C) with turbine blade cooling; 1750 degs F (954 degs C) without turbine blade cooling
Specific fuel consumption: apprx 0.25lbs/lb/hr (but some calculations bring this number to 0.15 lbs/lb/hr)
Thrust-to-weight ratio: 10 to 1






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