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Aviation / Aerospace

McDonnell F3H Demon


Carrierborne Fighter / Interceptor / Fighter-Bomber [ 1956 ]



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



Authored By: Staff Writer | Last Edited: 09/14/2022 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

GO TO SPECIFICATIONS [+]
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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.©MilitaryFactory.com
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As the Demon's airframe was too small to fit any larger, more current and proven jet engine, the next batch of production fighters were delivered with the Allison J71 turbojet. This resulted in the "F3H-2N" designation covering some additional 239 aircraft. The J71 was more powerful than the Westinghouse it replaced and was far more reliable in service.

The F3H-2M was brought online to support 4 x AIM-7 "Sparrow" medium-ranged Air-to-Air Missiles (AAMs), two under each wing. Only later was support for the AIM-9 "Sidewinder" short-ranged AAM series included with the usual arrangement of two of each missile carried. A further 239 were acquired as "F3H-2" fighter-bomber models cleared for carrying up to 6,000 lb of drop stores while also retaining the missile-launching qualities of the F3H-2M. The earlier F3H-2N also had a missile-launching function added.

The F3H-2P became a proposed photo-reconnaissance version of the F3H-2M but this initiative fell to naught. The F3H-3 was a more powerful version of the Demon to take the General Electric J73 engine but this design was never realized.

As completed, the Demon was of an all-modern appearance with its pointed nosecone, near-slab-sided fuselage walls and beautifully swept-back wing surfaces. The wing mainplanes were low-mounted along the fuselage sides and featured rounded tips. The tail unit was raised to allow clearance for the jet exhaust port underneath. The tail consisted of a single vertical fin and low-set horizontal planes. The engine, buried within the mid-aft section of the fuselage. was aspirated through two intake slits found along either side of the cockpit. The pilot was given a commanding view of the action ahead, his vision largely unobstructed forwards and to the sides. A tricycle undercarriage was fitted for ground running and the long nose leg gave the aircraft a pronounced "nose-up" appearance when at rest. The wing mainplanes held a hinged feature which allowed for folding aboard space-strapped American carriers. Standard, fixed armament comprised 4 x 20mm Colt Mk 12 cannons (some versions removed a pair as a weight-saving measure).

Demons were equipped with an ever-progressing line of AN/APG-51 radar which allowed for its all-weather interception capability.

The F3H series was a USN frontline fighter from 1956 until 1962 and provided a useful all-weather, missile-carrying counter to enemy aircraft threatening the American carrier force. By this time, the line was technologically outmoded and ultimately succeeded by the stellar Mach 2-capable McDonnell F-4 "Phantom II" series which could undertake all manner of mission types including ground attack and interception while carrying a hefty war load. The Phantom II, and the McDonnell F-101 "Voodoo", were influenced some by the F3H Demon design - hence some similarities in appearance between the three aircraft. The Phantom II was, indeed, born from an F3H endeavor known as the "Super Demon".

The 1962 restructuring by the USAF led to a redesignation of all in-service Demon marks (see variants listing). The F3H was retired in 1964.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.
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Specifications



Service Year
1956

Origin
United States national flag graphic
United States

Status
RETIRED
Not in Service.
Crew
1

Production
519
UNITS


National flag of the United States United States
(OPERATORS list includes past, present, and future operators when applicable)
Air-to-Air Combat, Fighter
General ability to actively engage other aircraft of similar form and function, typically through guns, missiles, and/or aerial rockets.
Interception
Ability to intercept inbound aerial threats by way of high-performance, typically speed and rate-of-climb.
Ground Attack (Bombing, Strafing)
Ability to conduct aerial bombing of ground targets by way of (but not limited to) guns, bombs, missiles, rockets, and the like.
Maritime / Navy
Land-based or shipborne capability for operating over-water in various maritime-related roles while supported by allied naval surface elements.


Length
59.0 ft
(17.98 m)
Width/Span
35.3 ft
(10.75 m)
Height
14.6 ft
(4.45 m)
Empty Wgt
22,134 lb
(10,040 kg)
MTOW
33,896 lb
(15,375 kg)
Wgt Diff
+11,762 lb
(+5,335 kg)
(Showcased structural values pertain to the McDonnell F3H-2 Demon production variant)
Installed: 1 x Allison J71-A-2E afterburning turbojet engine developing 14,000 lb of thrust (9,700 dry).
Max Speed
715 mph
(1,150 kph | 621 kts)
Ceiling
35,056 ft
(10,685 m | 7 mi)
Range
1,181 mi
(1,900 km | 3,519 nm)
Rate-of-Climb
12,800 ft/min
(3,901 m/min)


♦ MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030


(Showcased performance specifications pertain to the McDonnell F3H-2 Demon production variant. Performance specifications showcased above are subject to environmental factors as well as aircraft configuration. Estimates are made when Real Data not available. Compare this aircraft entry against any other in our database or View aircraft by powerplant type)
STANDARD:
4 x 20mm Colt Mk 12 internal cannons.

OPTIONAL:
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).


Supported Types


Graphical image of an aircraft automatic cannon
Graphical image of an air-to-air missile weapon
Graphical image of a short-range air-to-air missile
Graphical image of a medium-range air-to-air missile


(Not all ordnance types may be represented in the showcase above)
Hardpoint Mountings: 4


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


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