Pratt & Whitney

Pratt & Whitney is a very large American aircraft engine manufacturer. Pratt & Whitney engines are widely used in both civil and military aircraft.

The company was founded in 1860 by Francis Pratt & Amos Whitney, and has its headquarters in Hartford, Connecticut. As one of the "big three" aero-engine manufacturers the company competes with General Electric and Rolls-Royce. In addition to aircraft engines, Pratt & Whitney manufactures fixed gas turbines for industry and power generation, marine turbines, and railway locomotive engines.

There have been many famous Pratt & Whitney engines, including:

Reciprocating engines:

The JT3D powered many Boeing 707 variants and still powers many military 707 derivatives as well as the B-52 Stratofortress and C-141 transports.
The JT8D which powered many of the second-generation jet airliners, including the Boeing 727, Douglas DC-9 and the early generation Boeing 737.
The JT9D, as found in the original Boeing 747.
TF-30, used on the F-111 and early F-14s
F100, the engine used on many of today's high performance jet fighters including the F-15 and F-16. The F119 is a high-thrust descendent of the F100, in use on the F/A-22 Raptor. The F135 is a further development of the F119, powering the F-35 Joint Strike Fighter.

Pratt & Whitney is a business unit of industrial conglomerate United Technologies, making it a sister company to Otis Elevator Company and refrigeration giant Carrier Corporation.