Lockheed Martin F-35 Lightning II

The F-35 Lightning II is a family of stealth multirole combat aircraft developed by Lockheed Martin for the United States and allied military services. Its variants support conventional takeoff, short takeoff and vertical landing, and carrier operations.

F-35A: The conventional-takeoff-and-landing variant of the F-35 Lightning II, designed primarily for land-based air forces. It is the standard land-based variant used by the U.S. Air Force and several allies.
Pratt & Whitney F135: A turbofan engine family developed by Pratt & Whitney for all F-35 variants. The F135 powers every variant, with additional lift machinery enabling the F-35B's vertical-lift mode.
Joint Strike Fighter program: A multinational U.S.-led program to develop a family of affordable, common combat aircraft for several military services. The F-35 was selected as the program's winning design.
United States Air Force: The U.S. military service responsible for air operations and aerospace defense. It operates the F-35A as a land-based multirole fighter.
F-35 Lightning II program cost: The development, procurement, and operating expenses associated with the F-35 program. Long-term costs and sustainment needs have drawn scrutiny from governments and auditors.
F-35B: The F-35 variant capable of short takeoff and vertical landing, using a lift fan and swiveling exhaust nozzle. Its lift system enables operations from short decks and austere airstrips.
LiftSystem: The shaft-driven lift fan, clutch, roll-control ducts, and swiveling rear nozzle used for the F-35B's short-takeoff and vertical-landing capability. It distinguishes the F-35B from the conventional and carrier variants.
X-35: Lockheed Martin's experimental aircraft demonstrator for the Joint Strike Fighter competition. Its prototypes demonstrated the design that became the F-35.
United States Marine Corps: A U.S. military service organized for expeditionary operations on land and at sea. It operates the F-35B for expeditionary and amphibious aviation.
Joint Strike Fighter partners: Countries that joined the F-35 development program at different levels of partnership. International participation helped make the aircraft a widely shared procurement program.

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