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North American YF-93
par Altus Mer 07 Juil 2010, 14:55
Le NA YF-93 vu par Wikipedia de langue anglaise :
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The [Vous devez être inscrit et connecté pour voir ce lien] YF-93 was an American fighter development of the [Vous devez être inscrit et connecté pour voir ce lien] that emerged as a radically different variant that received its own designation.
Two were built and flown, but the project was eventually canceled.
[Vous devez être inscrit et connecté pour voir ce lien]
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The [Vous devez être inscrit et connecté pour voir ce lien] YF-93 was an American fighter development of the [Vous devez être inscrit et connecté pour voir ce lien] that emerged as a radically different variant that received its own designation.
Two were built and flown, but the project was eventually canceled.
Altus- CLUB
- Messages : 739
Re: North American YF-93
par Altus Mer 07 Juil 2010, 14:57
Design and development
In 1947, North American Aviation began a design study, NA-157, to create a true "penetration fighter" to meet the requirements of a long-range version of its F-86A Sabre.
In order to accommodate more fuel, a much larger F-86A was envisioned, eventually able to carry 1,961 US gallons
(7,420 l), both internally and with two 200-US-gallon (760 l) underwing drop tanks.
In 1947, North American Aviation began a design study, NA-157, to create a true "penetration fighter" to meet the requirements of a long-range version of its F-86A Sabre.
In order to accommodate more fuel, a much larger F-86A was envisioned, eventually able to carry 1,961 US gallons
(7,420 l), both internally and with two 200-US-gallon (760 l) underwing drop tanks.
Altus- CLUB
- Messages : 739
Re: North American YF-93
par Altus Mer 07 Juil 2010, 15:01
The new variant possessed a theoretical unrefuelled range of over 2,000 nmi (2,300 mi; 3,700 km), twice that of the standard production F-86A.
The resultant fighter originally designated the F-86C was intended to compete with the [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien] to fulfill the [Vous devez être inscrit et connecté pour voir ce lien] Penetration Fighter requirement for a bomber escort.
The resultant fighter originally designated the F-86C was intended to compete with the [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien] to fulfill the [Vous devez être inscrit et connecté pour voir ce lien] Penetration Fighter requirement for a bomber escort.
Altus- CLUB
- Messages : 739
Re: North American YF-93
par Altus Mer 07 Juil 2010, 15:02
The F-86C was much larger and heavier, weighing in at 10,640 lb (4,830 kg) more than its antecedent.
The increased weight and girth necessitated a dual-wheel main landing gear, increased wing area and a more powerful J48 rated at 6,250 lbf (27.8 kN) static thrust, with 8,750 lbf (38.9 kN) thrust available in afterburner.
With the SCR-720 search radar and six 20 mm (.79 in) cannon mounted in the nose where the air intake was on the F-86A, the engineers designed a novel set of flush-mounted [Vous devez être inscrit et connecté pour voir ce lien].
A "wasp waist" was also incorporated in the fuselage.
The increased weight and girth necessitated a dual-wheel main landing gear, increased wing area and a more powerful J48 rated at 6,250 lbf (27.8 kN) static thrust, with 8,750 lbf (38.9 kN) thrust available in afterburner.
With the SCR-720 search radar and six 20 mm (.79 in) cannon mounted in the nose where the air intake was on the F-86A, the engineers designed a novel set of flush-mounted [Vous devez être inscrit et connecté pour voir ce lien].
A "wasp waist" was also incorporated in the fuselage.
Altus- CLUB
- Messages : 739
Re: North American YF-93
par Altus Mer 07 Juil 2010, 15:05
In December 1947, the Air Force ordered two prototype NA-157s and, considering the many changes to the F-86, redesignated it YF-93A.
The first prototype was built with the NACA inlet ducts; the second aircraft had more conventional intakes.
Six months later, the initial contract was followed up with an order for 118 F-93A-NAs.
In 1949, the production order was abruptly canceled as priorities had shifted dramatically following the testing of the ground-breaking [Vous devez être inscrit et connecté pour voir ce lien] which reputedly would not need an escort due to its high speed capabilities.
With the prototype YF-93As just coming off the production line, the USAF took over the project.
The first prototype was built with the NACA inlet ducts; the second aircraft had more conventional intakes.
Six months later, the initial contract was followed up with an order for 118 F-93A-NAs.
In 1949, the production order was abruptly canceled as priorities had shifted dramatically following the testing of the ground-breaking [Vous devez être inscrit et connecté pour voir ce lien] which reputedly would not need an escort due to its high speed capabilities.
With the prototype YF-93As just coming off the production line, the USAF took over the project.
Altus- CLUB
- Messages : 739
Re: North American YF-93
par Altus Mer 07 Juil 2010, 15:08
Operational history
The prototypes, serial numbers 48-317 and -318, began flight tests in 1950 and were entered in a flyoff against the other penetration fighter projects, the XF-88 and XF-90; the XF-88 Voodoo was declared the winner.
None of the projects would be ordered.
The YF-93As were turned over to the [Vous devez être inscrit et connecté pour voir ce lien] (NACA) AMES facility for further testing before being utilized as chase aircraft until 1956.
The prototypes, serial numbers 48-317 and -318, began flight tests in 1950 and were entered in a flyoff against the other penetration fighter projects, the XF-88 and XF-90; the XF-88 Voodoo was declared the winner.
None of the projects would be ordered.
The YF-93As were turned over to the [Vous devez être inscrit et connecté pour voir ce lien] (NACA) AMES facility for further testing before being utilized as chase aircraft until 1956.
Altus- CLUB
- Messages : 739
Re: North American YF-93
par Altus Mer 07 Juil 2010, 15:09
Flight with the NACA ducts proved troublesome at high angles of attack, restricting air flow to the engines.
By this time, however, higher performance aircraft were available and both aircraft were eventually declared surplus and scrapped.
By this time, however, higher performance aircraft were available and both aircraft were eventually declared surplus and scrapped.
Altus- CLUB
- Messages : 739
Re: North American YF-93
par Altus Mer 07 Juil 2010, 15:12
Specifications (YF-93A)
General characteristics
General characteristics
- Crew: One
- Length: 44 ft 1 in (13.44 m)
- [Vous devez être inscrit et connecté pour voir ce lien]: 38 ft 9 in (11.81 m)
- Height: 15 ft 8 in (4.78 m)
- Wing area: 306 ft² (28.4 m²)
- Empty weight: 14,035 lb (6,366 kg)
- Loaded weight: 21,610 lb (9,800 kg)
- Powerplant: 1× [Vous devez être inscrit et connecté pour voir ce lien], 8,750 lbf (38.9 kN)
Altus- CLUB
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Re: North American YF-93
par Altus Mer 07 Juil 2010, 15:16
Performance
- [Vous devez être inscrit et connecté pour voir ce lien]: 708 mph (1,132 km/h)
- [Vous devez être inscrit et connecté pour voir ce lien]: 2,000 mi (3,200 km)
- [Vous devez être inscrit et connecté pour voir ce lien]: 46,800 ft (14,268 m)
- [Vous devez être inscrit et connecté pour voir ce lien]: 11,960 ft/min (60.8 m/s)
- [Vous devez être inscrit et connecté pour voir ce lien]: 71 lb/ft² (345 kg/m²)
- [Vous devez être inscrit et connecté pour voir ce lien]: 0.4
Altus- CLUB
- Messages : 739
Re: North American YF-93
par Altus Mer 07 Juil 2010, 15:17
Armament
- 6 × 20 mm (.79 in) cannon (proposed, not fitted to the prototypes)
Altus- CLUB
- Messages : 739
Re: North American YF-93
par Altus Mer 07 Juil 2010, 15:18
Bibliography
- Davis, Larry. F-86 Sabre in action. Carrollton, Texas: Squadron/Signal Publications, 1992. [Vous devez être inscrit et connecté pour voir ce lien].
- Pace, Steve. X-Fighters: USAF Experimental and Prototype Fighters, XP-59 to YF-23. Osceola, Wisconsin: Motorbooks International, 1991. [Vous devez être inscrit et connecté pour voir ce lien].
- Sgarlato, Nico and Franco Ragni. U.S. Fighters of the Fifties. Carrollton, Texas: Squadron/Signal Publications, 1979. [Vous devez être inscrit et connecté pour voir ce lien].
- Wagner, Ray. The North American Sabre. London: Macdonald, 1963. No ISBN.
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