McDonnell Douglas Corporation was one of the most consequential aerospace manufacturers in American history. Formed in 1967 through the merger of McDonnell Aircraft Corporation and Douglas Aircraft Company, the company produced some of the most iconic military and commercial aircraft of the 20th century before its acquisition by Boeing in 1997. In its three decades of existence, McDonnell Douglas shaped the skies over battlefields, airways, and airshows worldwide.
Military Aircraft
Attack Aircraft
McDonnell Douglas A-4 Skyhawk — Originally designed by Douglas Aircraft, the A-4 Skyhawk became one of the most versatile light attack jets ever built. Compact, agile, and rugged, it served with the U.S. Navy and Marine Corps for decades and was famously flown by the Blue Angels flight demonstration team. The A-4G Skyhawk was the Australian Navy variant, while Project Kahu was a New Zealand upgrade program that extended the type's operational life well into the 1990s.
McDonnell Douglas A-12 Avenger II — A joint program with General Dynamics to develop a stealthy carrier-based attack aircraft. The program was cancelled in 1991 amid cost overruns and technical difficulties, becoming one of the most expensive defence program cancellations in U.S. history.
Fighter Aircraft
McDonnell Douglas F-4 Phantom II — Perhaps the most iconic aircraft to bear the McDonnell name, the F-4 Phantom II was a twin-engine supersonic fighter that served with the U.S. Air Force, Navy, and Marine Corps, as well as numerous allied nations. It was flown by both the Blue Angels and the Thunderbirds. Numerous variants were developed — see the full list of F-4 Phantom II variants for details.
McDonnell Douglas F-15 Eagle — The definitive American air superiority fighter, the F-15 Eagle entered service in 1976 and remains in front-line use today. Its combat record is unmatched. The F-15E Strike Eagle added a ground attack capability, while the F-15 STOL/MTD was an experimental variant exploring short takeoff and landing technologies.
McDonnell Douglas F/A-18 Hornet — The multi-role strike fighter that replaced both the F-4 and A-7 in U.S. Navy and Marine Corps service. The Hornet became the signature aircraft of the Blue Angels. The CF-18 Hornet is the Canadian Armed Forces variant. The High Alpha Research Vehicle (HARV) was an F/A-18 modified for high angle-of-attack research. The F/A-18E/F Super Hornet — a substantially enlarged and redesigned evolution — was initiated under McDonnell Douglas before the Boeing merger completed it.
V/STOL Aircraft
McDonnell Douglas AV-8B Harrier II — Developed in partnership with British Aerospace, the AV-8B was a second-generation Harrier offering dramatically improved payload, range, and avionics over the original. It served with the U.S. Marine Corps and several allied air arms.
Trainers
McDonnell Douglas T-45 Goshawk — A carrier-capable jet trainer derived from the British Aerospace Hawk, adapted for U.S. Navy pilot training. It replaced the T-2 Buckeye and TA-4F in the naval aviation training pipeline.
Transport & Tanker Aircraft
McDonnell Douglas C-9 — A military transport and medevac aircraft based on the DC-9 airliner, serving with the U.S. Air Force and Navy.
McDonnell Douglas KC-10 Extender — A strategic tanker and cargo aircraft based on the DC-10, providing the U.S. Air Force with long-range aerial refuelling capability.
McDonnell Douglas C-17 Globemaster III — One of the most capable strategic airlifters ever built, the C-17 was designed and entered early production under McDonnell Douglas before the Boeing merger. It continues in widespread service today.
McDonnell Douglas YC-15 — An experimental short takeoff and landing (STOL) transport that competed in the USAF's Advanced Medium STOL Transport program, contributing technology that influenced the C-17.
Commercial Airliners
McDonnell Douglas DC-8 — Originally a Douglas Aircraft design, the DC-8 was a long-range four-engine jet that competed directly with the Boeing 707 and served airlines worldwide through the 1960s and 1970s.
McDonnell Douglas DC-9 — A short-to-medium range twin-jet that became one of the most successful airliners of its era. Its lineage continued through the MD-80, MD-90, and ultimately the Boeing 717.
McDonnell Douglas DC-10 — A wide-body trijet designed for medium-to-long range routes. Later upgraded with a modern glass cockpit as the MD-10. A firefighting variant, the DC-10 Air Tanker, serves as an aerial tanker for wildfire suppression.
McDonnell Douglas MD-11 — A stretched, modernized, and more fuel-efficient evolution of the DC-10, featuring a two-crew glass cockpit and winglets. Widely used in both passenger and freighter configurations.
McDonnell Douglas MD-80 — A stretched and re-engined evolution of the DC-9, the MD-80 family became a workhorse of short-to-medium haul aviation through the 1980s and 1990s.
McDonnell Douglas MD-90 — A further evolution of the MD-80 with more fuel-efficient IAE V2500 engines and updated systems.
MD-95 — The final evolution of the DC-9 lineage, the MD-95 was rebranded the Boeing 717 after the merger and served regional carriers into the 2010s.
Experimental Aircraft
McDonnell Douglas X-36 — A subscale tailless agility research aircraft developed jointly with NASA to explore advanced fighter configurations without conventional tail surfaces.
Bird of Prey — A highly classified stealth technology demonstrator developed in the 1990s, publicly revealed by Boeing in 2002. It pioneered single-curved surface manufacturing techniques later used on the Boeing 787.
Proposed Airliners
McDonnell Douglas pursued several ambitious airliner concepts that never reached production. The DC-10 Twin was a twin-engine derivative of the DC-10. The MD-12 was a proposed double-decker wide-body similar in concept to the later Airbus A380 and Boeing NLA studies. The MD-94X was an advanced propfan-powered airliner concept exploring next-generation propulsion efficiency.
Helicopters
Through its acquisition of Hughes Helicopters in 1984, McDonnell Douglas inherited a strong rotorcraft portfolio. The AH-64 Apache — originally a Hughes design — became the U.S. Army's primary attack helicopter and remains in service today. The MD 500 series (also from Hughes) is a family of light utility helicopters widely used in military and civilian roles. The MD 600 and MD 901/902/902 Explorer represented McDonnell Douglas's own rotorcraft developments, with the Explorer featuring the innovative NOTAR (No Tail Rotor) system.
Legacy
McDonnell Douglas's 30-year history produced an extraordinary breadth of aircraft — from supersonic fighters to wide-body airliners, from attack helicopters to experimental stealth demonstrators. When Boeing completed its acquisition in August 1997, it absorbed not just a competitor but a century of accumulated engineering knowledge, production capability, and operational heritage. Many McDonnell Douglas designs continue to fly today, a testament to the quality and longevity of the company's work.