Pratt & Whitney F100

The Pratt & Whitney F100 (company designation JTF22) is an afterburning turbofan engine manufactured by Pratt & Whitney which powers the A-7F Corsair II, F-15 Eagle and F-16 Fighting Falcon.
==Variants==
===F100-PW100===
The F100-100 first flew in an F-15 Eagle in 1972 with a thrust of 23,930 lbf (106.4 kN). Due to the advanced nature of engine and aircraft, numerous problems were encountered in its early days of service including high wear, stalling and "hard" afterburner starts. These "hard" starts could be caused by failure of the afterburner to start or by extinguishing after start, in either case the large jets of jet fuel were lit by the engine exhaust resulting in high pressure waves causing the engine to stall. Early problems were solved in the F100-PW-220, and the engine is still in the USAF fleet to this day. 
===F100-PW200===
The F-16 Fighting Falcon entered service with the F100-200, with only slight differences from the -100. Seeking a way to drive unit costs down, the USAF implemented the Alternative Fighter Engine (AFE) program in 1984, under which the engine contract would be awarded through competition. The F-16C/D Block 30/32s were the first to be built with the common engine bay, able to accept the existing engine or the General Electric F110. 
===F100-PW220/220E===
Due to the unsatisfactory reliability, maintenance costs, and service life of the F100-PW-100/200, Pratt & Whitney was eventually pressured into upgrading the engine to address these issues. The resulting engine, designated F100-PW-220, almost eliminates stall-stagnations and augmenter instability as well as doubling time between depot overhauls. Reliability and maintenance costs were also drastically improved, and the engine incorporates a digital electronic engine control (DEEC). The F100-PW-220 was introduced in 1986 and could be installed on either an F-15 or F-16. A non-afterburning variant, the F100-PW-220U powers the Northrop Grumman X-47B UCAV. The "E" abbreviation from 220E is for equivalent. The abbreviation is given to engines which have been upgraded from series 100 or 200 to 220, thus becoming equivalent to 220 specifications. 
===F100-PW229===
The first -229 was flown in 1989 and has a thrust of 17,800 lbf (79 kN) (dry thrust) and 29,160 lbf (129.7 kN) with afterburner. It currently powers late model F-16s and F-15Es. Using technology developed from the F119 and F135 engine programs for the F-22 Raptor and F-35 Lightning II, the current production F100-PW-229 EEP (Engine Enhancement Package) incorporates modern turbine materials, cooling management techniques, compressor aerodynamics, and electronic controls. Deliveries of the -229EEP began in 2009. 
==Uses==
===F100===
*LTV A-7F Corsair II
*McDonnell-Douglas F-15 Eagle
**McDonnell-Douglas F-15E Strike Eagle
***McDonnell-Douglas F-15I Ra'am
***Boeing F-15K Slam Eagle
*General Dynamics F-16 Fighting Falcon
*Northrop Grumman X-47B
===F401===
*Grumman F-14B/C Tomcat (planned; test aircraft only)
*Rockwell XFV-12
*Vought V-1600 (proposed)
==See Also==
===Related Development===
*Pratt & Whitney PW1120
===Comparable Engines===
*Eurojet EJ2x0
*General Electric F110
*Klimov RD-33
*Saturn AL-31
*Shenyang WS-10
F100, Pratt & Whitney
F100, Pratt & Whitney