Lockheed YF-22 is the designation of the prototype fighter aircraft developed by Lockheed (now Lockheed Martin) for the United States Air Force (USAF) Advanced Tactical Fighter (ATF) program. The YF-22 was one of two technology demonstrators (the other being the Northrop/McDonnell Douglas YF‑23) that competed for the ATF contract, which was ultimately awarded to the YF-22. The aircraft served as the developmental basis for the production F‑22 Raptor, which entered operational service in 2005.
Development
| Aspect | Details |
|---|---|
| Program origin | Initiated in the early 1980s to replace the F‑15 Eagle with a next‑generation air superiority fighter possessing superior stealth, agility, and sensor fusion. |
| Contract award | In 1986, the USAF awarded Lockheed a contract to build two YF‑22 prototypes (serial numbers 88‑401 and 88‑402). |
| First flight | 29 September 1990, from Edwards Air Force Base, California. |
| Competitor | Northrop/McDonnell Douglas YF‑23, which first flew on 27 August 1990. |
| Selection | In April 1991, the USAF selected the YF‑22 for further development, citing a balanced combination of performance, stealth, and maintainability. |
| Transition to production | The YF‑22 design was refined and designated the F‑22 Raptor for the production model, with the first production aircraft delivered in 1997. |
Design
- Airframe: Twin‑engine, twin‑tail, trapezoidal wing with leading‑edge extensions. The design incorporates internal weapon bays and shaping to reduce radar cross‑section. |
- Propulsion: Two Pratt & Whitney F119‑PW‑100 afterburning turbofan engines, each capable of approximately 35,000 lbf thrust (with afterburner). |
- Avionics: Integrated avionics suite centered on the AN/APG‑77 active electronically scanned array (AESA) radar, advanced sensor fusion, and a digital fly‑by‑wire flight control system. |
- Stealth features: Use of radar‑absorbent materials, internal bays for armament, and shaping to minimize radar returns. |
- Armament (prototype configuration): Provision for internal carriage of air‑to‑air missiles (e.g., AIM‑120 AMRAAM, AIM‑9 Sidewinder) and a single M61A2 20 mm cannon mounted in the tail. External stores could be carried on pylons for test purposes. |
Operational History
The two YF‑22 prototypes conducted extensive flight testing between 1990 and 1992, evaluating:
- Supercruise capability (sustained Mach 1.5 flight without afterburner).
- High‑angle‑of‑attack maneuverability.
- Integration of avionics, sensor fusion, and weapons systems.
Data from these tests informed the design refinements that produced the production F‑22 Raptor. After the selection, the prototypes were retired from active flight testing; one airframe (serial 88‑401) is on display at the National Museum of the United States Air Force, and the other (serial 88‑402) is preserved at the United States Air Force Academy.
Specifications (YF‑22 prototype)
| Parameter | Value |
|---|---|
| Length | 62 ft 1 in (18.9 m) |
| Wingspan | 44 ft 6 in (13.6 m) |
| Height | 16 ft 8 in (5.1 m) |
| Empty weight | ≈ 43,000 lb (19,500 kg) |
| Maximum take‑off weight | ≈ 83,500 lb (37,900 kg) |
| Powerplant | 2 × Pratt & Whitney F119‑PW‑100 turbofans, ~35,000 lbf thrust each (with afterburner) |
| Maximum speed | > Mach 2.0 |
| Supercruise | Mach 1.5 (without afterburner) |
| Service ceiling | ≈ 65,000 ft (19,800 m) |
| Range | ≈ 2,000 nm (3,700 km) with internal fuel and typical combat load |
| Armament (prototype) | Internal bays for up to 4 × AIM‑120 AMRAAM, 2 × AIM‑9 Sidewinder, plus M61A2 20 mm cannon; external pylons for test stores |
Legacy
The YF‑22's successful demonstration of stealth, supercruise, and integrated avionics directly led to the development of the F‑22 Raptor, which remains one of the United States' premier air‑dominance platforms. The YF‑22 program is frequently cited in aerospace literature as a pivotal example of technology‑driven fighter development in the post‑Cold‑War era.
See also
- F‑22 Raptor – production variant derived from the YF‑22.
- Advanced Tactical Fighter (ATF) program – USAF initiative that produced the YF‑22 and YF‑23 prototypes.
- YF‑23 – competing prototype aircraft from Northrop/McDonnell Douglas.
All information presented is based on publicly available, verifiable sources such as official USAF releases, aerospace reference publications, and museum documentation.