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Curtiss Y1A 18 & A-18 Shrike
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Curtiss Y1A 18 & A-18 Shrike
par Vitoll Sam 27 Fév 2010, 17:17
D'abord le Y1A-18 traité sur le National Museum of US Air Force :
[Vous devez être inscrit et connecté pour voir ce lien]
[Vous devez être inscrit et connecté pour voir ce lien]
The Curtiss Y1A-18 was an improved version of the [Vous devez être inscrit et connecté pour voir ce lien].
The XA-14 made its first flight in July 1935, and a year later the Air Corps ordered 13 service test aircraft.
These aircraft were designated Y1A-18 because of an engine change.
The XA-14 has Wright R-1670-5 Whirlwind engines, and the Y1A-18s had Wright R-1820-47 Cyclone radial engines.
The new engines were more powerful, but the gross weight of the aircraft was higher so the performance was roughly the same as the XA-14.
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- Messages : 321
Re: Curtiss Y1A 18 & A-18 Shrike
par Vitoll Sam 27 Fév 2010, 17:18
Curtiss developed the aircraft under the company designation Model 76A with the nickname Shrike.
The Shrike nickname was assigned to six separate attack aircraft: A-8, A-10, A-12, A-14, A-18 and A-25.
Curtiss used a similar naming scheme for its Hawk series of pursuit planes and Falcon series of observation and attack aircraft.
The Army Air Corps never used the Shrike nickname for any of its aircraft.
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- Messages : 321
Re: Curtiss Y1A 18 & A-18 Shrike
par Vitoll Sam 27 Fév 2010, 17:21
The first Y1A-18 was delivered for testing in midsummer 1937.
The aircraft performed well, but no further orders were placed for two primary reasons.
First, the aircraft were expensive and the Air Corps budget of the mid to late 1930s could not support a large A-18 order.
Second, improved twin-engine attack aircraft were in the planning stages (notably the Douglas A-20) which would
make the A-18 obsolete in a short time.
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- Messages : 321
Re: Curtiss Y1A 18 & A-18 Shrike
par Vitoll Sam 27 Fév 2010, 17:24
Le A 18 sur Wikipedia, in english :
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The Curtiss A-18 Model 76A Shrike II was a 1930s [Vous devez être inscrit et connecté pour voir ce lien] twin-engine light attack aircraft.
It was the production test version of that company's [Vous devez être inscrit et connecté pour voir ce lien].
Design and development
In the years leading up to [Vous devez être inscrit et connecté pour voir ce lien], the [Vous devez être inscrit et connecté pour voir ce lien] were interested in attack aircraft capable of
carrying larger bomb loads with greater firepower.
The attack aircraft design standard essentially became a light bomber with firepower only slightly less than the medium bombers being developed as the standard .30 in (7.62 mm) machine gun generally was replaced by .50 in (12.7 mm) ones on new aircraft in development.
The Curtiss YA-14[Vous devez être inscrit et connecté pour voir ce lien] that emerged in 1935 was one of the first single-mission attack aircraft.
Although it looked purposeful with its slender [Vous devez être inscrit et connecté pour voir ce lien], thin nose and sleek streamlining, the A-14 was hampered by a lack of power, despite its two 775 hp (580 kW) Wright [Vous devez être inscrit et connecté pour voir ce lien].
-----------------------------------------------
The Curtiss A-18 Model 76A Shrike II was a 1930s [Vous devez être inscrit et connecté pour voir ce lien] twin-engine light attack aircraft.
It was the production test version of that company's [Vous devez être inscrit et connecté pour voir ce lien].
Design and development
In the years leading up to [Vous devez être inscrit et connecté pour voir ce lien], the [Vous devez être inscrit et connecté pour voir ce lien] were interested in attack aircraft capable of
carrying larger bomb loads with greater firepower.
The attack aircraft design standard essentially became a light bomber with firepower only slightly less than the medium bombers being developed as the standard .30 in (7.62 mm) machine gun generally was replaced by .50 in (12.7 mm) ones on new aircraft in development.
The Curtiss YA-14[Vous devez être inscrit et connecté pour voir ce lien] that emerged in 1935 was one of the first single-mission attack aircraft.
Although it looked purposeful with its slender [Vous devez être inscrit et connecté pour voir ce lien], thin nose and sleek streamlining, the A-14 was hampered by a lack of power, despite its two 775 hp (580 kW) Wright [Vous devez être inscrit et connecté pour voir ce lien].
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- Messages : 321
Re: Curtiss Y1A 18 & A-18 Shrike
par Vitoll Sam 27 Fév 2010, 17:26
Nevertheless, the prototype was able to achieve a maximum speed of 254 mph (409 km/h), outstripping the frontline [Vous devez être inscrit et connecté pour voir ce lien] by 20 mph (32 km/h).
Re-engined with 735 hp (550 kW) Curtiss R-1670-5 engines, it was delivered to the Army under serial number 36-146.
Re-engined with 735 hp (550 kW) Curtiss R-1670-5 engines, it was delivered to the Army under serial number 36-146.
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- Messages : 321
Re: Curtiss Y1A 18 & A-18 Shrike
par Vitoll Sam 27 Fév 2010, 17:27
Operational history
A newly improved variant, the Y1A-18 had upgraded 850 hp (630 kW) [Vous devez être inscrit et connecté pour voir ce lien]-47 radial engines with three-bladed [Vous devez être inscrit et connecté pour voir ce lien] replacing the original two-bladed models.
Thirteen aircraft were produced, serial numbers 37-52 through 37-64, and although successful in testing, further production was not ordered due to a lack of funds and the availability of more advanced aircraft
(such as the [Vous devez être inscrit et connecté pour voir ce lien]) under design.
After completion of service testing, the Y1A-18s were assigned to operational attack groups and redesignated A-18.
A newly improved variant, the Y1A-18 had upgraded 850 hp (630 kW) [Vous devez être inscrit et connecté pour voir ce lien]-47 radial engines with three-bladed [Vous devez être inscrit et connecté pour voir ce lien] replacing the original two-bladed models.
Thirteen aircraft were produced, serial numbers 37-52 through 37-64, and although successful in testing, further production was not ordered due to a lack of funds and the availability of more advanced aircraft
(such as the [Vous devez être inscrit et connecté pour voir ce lien]) under design.
After completion of service testing, the Y1A-18s were assigned to operational attack groups and redesignated A-18.
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- Messages : 321
Re: Curtiss Y1A 18 & A-18 Shrike
par Vitoll Sam 27 Fév 2010, 17:28
The aircraft were initially sent to the [Vous devez être inscrit et connecté pour voir ce lien], [Vous devez être inscrit et connecté pour voir ce lien] at [Vous devez être inscrit et connecté pour voir ce lien], [Vous devez être inscrit et connecté pour voir ce lien].
They won a USAAC award for bombing and gunnery in their first year of service.
The A-18 was only used for a short time before being replaced by more advanced attack aircraft.
The A-18 was retired from frontline service in 1940 and was never used in combat.
The last A-18 in flying condition was grounded in 1943.
They won a USAAC award for bombing and gunnery in their first year of service.
The A-18 was only used for a short time before being replaced by more advanced attack aircraft.
The A-18 was retired from frontline service in 1940 and was never used in combat.
The last A-18 in flying condition was grounded in 1943.
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- Messages : 321
Re: Curtiss Y1A 18 & A-18 Shrike
par Vitoll Sam 27 Fév 2010, 17:29
Specifications (Y1A-18)
Data from "The Complete Encyclopedia of World Aircraft" Editors: Paul Eden & Soph Moeng, 2002,
[Vous devez être inscrit et connecté pour voir ce lien], page 517
General characteristics
Data from "The Complete Encyclopedia of World Aircraft" Editors: Paul Eden & Soph Moeng, 2002,
[Vous devez être inscrit et connecté pour voir ce lien], page 517
General characteristics
- Crew: two
- Length: 41 ft 0 in (12.50 m)
- [Vous devez être inscrit et connecté pour voir ce lien]: 59 ft 6 in (18.14 m)
- Height: 11 ft 6 in (3.51 m)
- Wing area: 526 ft² (48.87 m²)
- Empty weight: 9,410 lb (4268 kg)
- [Vous devez être inscrit et connecté pour voir ce lien]: 13,170 lb (5,974 kg)
- Powerplant: 2× [Vous devez être inscrit et connecté pour voir ce lien]-47 [Vous devez être inscrit et connecté pour voir ce lien], 850 hp (634 kW) each
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Re: Curtiss Y1A 18 & A-18 Shrike
par Vitoll Sam 27 Fév 2010, 17:30
Performance
- [Vous devez être inscrit et connecté pour voir ce lien]: 247 mph (398 km/h)
- [Vous devez être inscrit et connecté pour voir ce lien]: 217 mph (349 km/h)
- [Vous devez être inscrit et connecté pour voir ce lien]: 651 mi (1,048 km)
- [Vous devez être inscrit et connecté pour voir ce lien]: 25,650 ft (8,370 m)
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- Messages : 321
Re: Curtiss Y1A 18 & A-18 Shrike
par Vitoll Sam 27 Fév 2010, 17:31
Armament
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[Vous devez être inscrit et connecté pour voir ce lien]
- 4 × forwards-firing .30 in (7.62 mm) [Vous devez être inscrit et connecté pour voir ce lien]
- 1 × aft-firing .30 in (7.62 mm) machine gun
- 400 lb (272 kg) bombs in two wing bays
- 200 lb (91 kg) bombs or chemical smoke tanks underwing
------------------------------------------------------------------
[Vous devez être inscrit et connecté pour voir ce lien]
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- Messages : 321
Re: Curtiss Y1A 18 & A-18 Shrike
par QaR Lun 18 Oct 2010, 15:50
Dernière édition par QaR le Lun 18 Oct 2010, 15:59, édité 1 fois
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