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McDonnell F3H Demon Carrierborne Fighter / Interceptor / Fighter-Bomber (1956)

Authored By Staff Writer | Last Updated: 10/2/2015

The F3H Demon was the first swept-wing, turbojet-powered fighter design offered by McDonnell Aircraft.

During World War 2 (1939-1945), the Japanese Mitsubishi A6M "Zero" fighter appeared and made possible a carrier-based fighter that outperformed its land-based rivals. In time, American technology and carrier doctrine allowed for a shifting of superiority in the Pacific Theater which ultimately led to the end of the war as a whole. The dawn of the jet age also ushered in an all-new generation of fighter for the United States Navy (USN) and the McDonnell concern became a longtime contributor to the service branch with various designs introduced.

First came the FH "Phantom" of 1947 and 62 examples were completed of this subsonic, straight-winged, twin turbojet-powered development. The Phantom was then followed into service by another jet-powered straight-winged type in the twin-engined F2H "Banshee". This development found greater numerical success in that 895 of the line were produced for the United States and Canada became its only foreign operator. From this work arrived an all-new development, the first by McDonnell to feature swept-back wing mainplanes, in the subsonic F3H "Demon". The Demon was adopted by the USN as a counter to the high-speed, swept-wing Mikoyan-Gurevich MiG-15 "Fagot" jet fighter introduced by the Soviet Union and developed concurrently with the Douglas F4D "Skyray", the USN's first supersonic fighter.

The Demon had roots in a 1949 initiative that sought to produce a swept-wing fighter from the outset as opposed to modifying an existing straight-winged form later on in development. A single engine configuration was selected this time around while the aircraft was to be crewed by one. The engine of choice became the in-development Westinghouse J40 which promised over 10,000 pounds of thrust output from a single source. The power of this one engine alone was seen as sufficient by USN authorities when compared to weaker twin-powered types seen previously and was to mark a new shift in USN aircraft propulsion.

"XF3H-1" was the designation allotted to the two prototypes ordered and these ultimately came equipped with the Westinghouse XJ40-WE-6 turbojet engine though it offered only 6,500 lb of dry thrust and 9,200 lb with afterburner - far below the promised operating figures. The engine never truly shined and made the Demon underpowered while showing itself to be largely unreliable - it had its own development terminated in 1955.

Nevertheless, the USN was in need of high-performance, frontline fighters and continued to push the F3H program along. This resulted in the initial "F3H-1N" production model which continued with the Westinghouse J40-WE-22 engine of 7,200 lb thrust (10,900 lb with afterburner). Fifty-eight of this mark were produced but only 35 carried the J40. At least four airmen lost their lives to these early machines. With the end of the J40 engine project and the subsequent grounding of the active F3H-1N fleet, the proposed "F3H-1P" photo-reconnaissance variant was not followed up on.

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Specifications for the
McDonnell F3H Demon
Carrierborne Fighter / Interceptor / Fighter-Bomber

Focus Model: McDonnell F3H-2 Demon
Country of Origin: United States
Manufacturer: McDonnell Aircraft - USA
Initial Year of Service: 1956
Production Total: 519

Crew: 1

Length: 58.99 ft (17.98 m)
Width: 35.27 ft (10.75 m)
Height: 14.60ft (4.45 m)
Weight (Empty): 22,134 lb (10,040 kg)
Weight (MTOW): 33,896 lb (15,375 kg)

Powerplant: 1 x Allison J71-A-2E afterburning turbojet engine developing 14,000 lb of thrust (9,700 dry).

Maximum Speed: 715 mph (1,150 kmh; 621 kts)
Maximum Range: 1,181 miles (1,900 km)
Service Ceiling: 35,056 ft (10,685 m; 6.6 miles)
Rate-of-Climb: 12,800 feet-per-minute (3,901 m/min)

Hardpoints: 4
Armament Suite:
4 x 20mm Colt Mk 12 cannons

4 x AIM-9 "Sidewinder" short-ranged or AIM-7 "Sparrow" medium-ranged Air-to-Air Missiles (AAMs) (F3H-2N / F3H-2M).

Up to 6,000 lb of external ordnance (F3H-2).

F3H "Demon" - Base Series Designation

XF3H-1 - Prototype model; two examples completed; powered by Westinghouse XJ40-WE-6 series turbojet engine of 9,200 lb thrust.

F3H-1N - Initial production model; 58 examples completed; fitted with Westinghouse J40-WE-22 turbojet engine of 7,200 lb thrust.

F3H-1P - Proposed reconnaissance variant based on F3H-1; not pursued.

F3H-2N - Fitted with Allison J71-A-2 turbojet engine of 14,250 lb thrust; 239 examples completed.

F3H-2M - Missile-armed variant of the F3H-2N; support for AIM-7 Sparrow missile series; 80 examples.

F3H-2 - Fighter-Bomber variant; Up to 6,000 lb of conventional drop stores carried; retaining missile capability; 239 examples completed.

F3H-2P - Proposed photo-reconnaissance variant of the F3H-2; not built.

F3H-3 - Proposed variant with General Electric J73 engine of greater output power; not adopted.

F-3C - 1962 redesignation of F3H-2N

MF-3B - 1962 redesignation of F3H-2M

F-3B - 1962 redesignation of F3H-2

United States