F-35B

F-35B. The F-35B Lightning II is the short takeoff and vertical landing (STOVL) variant of the Lockheed Martin F-35 Lightning II family of fifth-generation stealth multirole combat aircraft. Developed primarily for the United States Marine Corps, it enables operations from amphibious assault ships and austere forward bases. Its unique propulsion system, centered on the Rolls-Royce LiftSystem, allows it to perform like a conventional fighter while retaining the ability to hover and land vertically.

Development and variants

The origins of the F-35B trace back to the Joint Strike Fighter program, a competition initiated by the United States Department of Defense to replace various tactical aircraft across the U.S. Air Force, U.S. Navy, and U.S. Marine Corps. Lockheed Martin's design, derived from the technology demonstrator Lockheed Martin X-35, defeated the proposal from Boeing's Boeing X-32. The STOVL variant was a critical requirement to meet the needs of the Royal Air Force and the Italian Air Force, who sought a successor to the British Aerospace Harrier II. Key development milestones included overcoming significant weight and technical challenges with the lift-fan system, with major testing conducted at Naval Air Station Patuxent River and Edwards Air Force Base. The variant achieved initial operational capability with the United States Marine Corps in 2015.

Design and features

The F-35B's most distinctive feature is its Rolls-Royce LiftSystem, which includes a lift fan located behind the cockpit, a swiveling Pratt & Whitney F135 engine nozzle, and roll-control ducts. This configuration allows for short takeoffs, vertical landings, and supersonic flight. The airframe incorporates advanced stealth technology, with radar-absorbent materials and internal weapons bays to minimize its radar cross-section. Its sensor fusion is powered by the Northrop Grumman-developed AN/APG-81 AESA radar and the Lockheed Martin AAQ-37 Distributed Aperture System, providing unparalleled situational awareness. The aircraft is also equipped with the Harris Corporation MADL datalink for secure communication within the F-35 Lightning II fleet.

Operational history

The United States Marine Corps declared the F-35B ready for combat in 2015, with Marine Fighter Attack Squadron 121 being the first operational unit. Its first combat deployment occurred in 2018 aboard the amphibious assault ship USS Wasp (LHD-1), flying missions in support of Operation Inherent Resolve in Afghanistan and Syria. The Royal Air Force and the Royal Navy commenced carrier operations with the F-35B aboard HMS Queen Elizabeth (R08) in 2021, participating in exercises like CSG21. The Italian Air Force and Italian Navy also operate the type from the carrier ITS Cavour (550). The Japan Air Self-Defense Force plans to operate the F-35B from modified Izumo-class helicopter destroyers.

Operators

* United States: The United States Marine Corps is the primary operator, with squadrons such as VMFA-122 and VMFA-225. * United Kingdom: Operated jointly by the Royal Air Force and Royal Navy, with frontline squadrons including No. 617 Squadron RAF and the 809 Naval Air Squadron. * Italy: Operated by the Italian Air Force's 13º Gruppo and will be deployed on the Italian Navy's ITS Trieste (L9890). * Japan: The Japan Air Self-Defense Force has ordered the variant for operation from its naval vessels. * Future operators include the Republic of Singapore Air Force and potentially the Republic of Korea Navy.

Specifications (F-35B)

* Crew: 1 * Length: 51.3 ft (15.6 m) * Wingspan: 35 ft (10.7 m) * Height: 14.3 ft (4.4 m) * Empty weight: 32,300 lb (14,651 kg) * Powerplant: 1 × Pratt & Whitney F135-PW-600 afterburning turbofan with lift fan * Maximum speed: Mach 1.6 * Combat range: 900 nmi (1,670 km) * Service ceiling: 50,000 ft (15,000 m) * Armament: Internal bay for AIM-120 AMRAAM, AIM-9X Sidewinder, GBU-12 Paveway II, and AGM-154 JSOW; external hardpoints when stealth is not required. * Avionics: AN/APG-81 radar, AAQ-37 Electro-Optical Distributed Aperture System, AN/ASQ-239 Barracuda electronic warfare system.

Category:Military aircraft of the United States Category:Stealth aircraft Category:VTOL aircraft