Curtiss P-1 Hawk
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Curtiss P-1 Hawk
Curtiss P-1 Hawk sur Wikipedia.en
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The P-1 Hawk (Curtiss Model 34) was a 1920s open-[Vous devez être inscrit et connecté pour voir ce lien] of the [Vous devez être inscrit et connecté pour voir ce lien].
An earlier variant of the same aircraft had been designated PW-8 prior to 1925[Vous devez être inscrit et connecté pour voir ce lien].
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The P-1 Hawk (Curtiss Model 34) was a 1920s open-[Vous devez être inscrit et connecté pour voir ce lien] of the [Vous devez être inscrit et connecté pour voir ce lien].
An earlier variant of the same aircraft had been designated PW-8 prior to 1925[Vous devez être inscrit et connecté pour voir ce lien].
Giordano- CLUB
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Re: Curtiss P-1 Hawk
Design and development
PW-8
The [Vous devez être inscrit et connecté pour voir ce lien] P-1 Hawk was the first [Vous devez être inscrit et connecté pour voir ce lien] aircraft to be assigned the "P" (Pursuit) designation which replaced seven designations for pursuit aircraft, including "PW" (for "Pursuit, Water-cooled engine").
The P-1 was the production version of the Curtiss XPW-8B, an improved variant of the PW-8, 25 of which were operational with the Air Service's [Vous devez être inscrit et connecté pour voir ce lien]
PW-8
The [Vous devez être inscrit et connecté pour voir ce lien] P-1 Hawk was the first [Vous devez être inscrit et connecté pour voir ce lien] aircraft to be assigned the "P" (Pursuit) designation which replaced seven designations for pursuit aircraft, including "PW" (for "Pursuit, Water-cooled engine").
The P-1 was the production version of the Curtiss XPW-8B, an improved variant of the PW-8, 25 of which were operational with the Air Service's [Vous devez être inscrit et connecté pour voir ce lien]
Giordano- CLUB
- Messages : 942
Re: Curtiss P-1 Hawk
In September 1923, the Army ordered production of the PW-8[Vous devez être inscrit et connecté pour voir ce lien] .
The PW-8 (Curtiss Model 33) had been acquired by the Air Service after a competition with the [Vous devez être inscrit et connecté pour voir ce lien], designated the PW-9, to replace the existing Army fighter, the [Vous devez être inscrit et connecté pour voir ce lien].
The PW-8 (Curtiss Model 33) had been acquired by the Air Service after a competition with the [Vous devez être inscrit et connecté pour voir ce lien], designated the PW-9, to replace the existing Army fighter, the [Vous devez être inscrit et connecté pour voir ce lien].
Giordano- CLUB
- Messages : 942
Re: Curtiss P-1 Hawk
Although the PW-8 was faster than the PW-9 (both having top speeds in excess of 165 mph), it was otherwise out-performed by the Boeing plane, and its cooling system appeared to be more difficult to maintain and vulnerable in combat.
However Assistant Chief of the Air Service Brig. Gen. [Vous devez être inscrit et connecté pour voir ce lien] agreed to purchase 25 PW-8s in return for assistance by Curtiss in making the [Vous devez être inscrit et connecté pour voir ce lien].
However Assistant Chief of the Air Service Brig. Gen. [Vous devez être inscrit et connecté pour voir ce lien] agreed to purchase 25 PW-8s in return for assistance by Curtiss in making the [Vous devez être inscrit et connecté pour voir ce lien].
Giordano- CLUB
- Messages : 942
Re: Curtiss P-1 Hawk
P-1
The prototype of the P-1, the XPW-8B, came about when the Air Service, which had selected the Boeing [Vous devez être inscrit et connecté pour voir ce lien] over the PW-8 as its main production fighter, asked Curtiss to modify one of its three original XPW-8 prototypes with wings resembling those of the PW-9. Curtiss designated the modified aircraft its Model 34A and returned it to the Air Service for evaluation, from which the service ordered it into production as the P-1. The first production P-1, serial number 25-410, was delivered on August 17, 1925, and was followed in successive years by the P-1B and P-1C variants with improved engines. The newest P-1 variants remained in operational service until 1930.
The prototype of the P-1, the XPW-8B, came about when the Air Service, which had selected the Boeing [Vous devez être inscrit et connecté pour voir ce lien] over the PW-8 as its main production fighter, asked Curtiss to modify one of its three original XPW-8 prototypes with wings resembling those of the PW-9. Curtiss designated the modified aircraft its Model 34A and returned it to the Air Service for evaluation, from which the service ordered it into production as the P-1. The first production P-1, serial number 25-410, was delivered on August 17, 1925, and was followed in successive years by the P-1B and P-1C variants with improved engines. The newest P-1 variants remained in operational service until 1930.
Giordano- CLUB
- Messages : 942
Re: Curtiss P-1 Hawk
The March 7, 1925 order for the P-1 also requested five aircraft with the more powerful 500 hp (373 kW) Curtiss V-1400 [Vous devez être inscrit et connecté pour voir ce lien] installed. These were completed in January 1926. The first (SN 25-420) was then modified with a [Vous devez être inscrit et connecté pour voir ce lien] mounted on the right side of the [Vous devez être inscrit et connecté pour voir ce lien] nose, and whose turbine was driven by engine exhaust; the craft was designated XP-2[Vous devez être inscrit et connecté pour voir ce lien]
Giordano- CLUB
- Messages : 942
Re: Curtiss P-1 Hawk
However, the Curtiss V-1400 engine did not perform up to expectations, with or without the supercharger, and so after a year in service, three of the standard P-2 Hawks had their engines replaced with the Curtiss V-1150 and were consequently redesignated as P-1s.
The fifth machine (25-243) received a Curtiss V-1570 Conqueror engine and became the [Vous devez être inscrit et connecté pour voir ce lien][Vous devez être inscrit et connecté pour voir ce lien].
The fifth machine (25-243) received a Curtiss V-1570 Conqueror engine and became the [Vous devez être inscrit et connecté pour voir ce lien][Vous devez être inscrit et connecté pour voir ce lien].
Giordano- CLUB
- Messages : 942
Re: Curtiss P-1 Hawk
93 production P-1s were brought into service in the P-1, P-1A, P-1B, and P-1C variants.
52 other P-1s, variants P-1D, P-1E, and P-1F, were made by conversion of other Hawk variants, primarily At-4 and At-5 trainers.
52 other P-1s, variants P-1D, P-1E, and P-1F, were made by conversion of other Hawk variants, primarily At-4 and At-5 trainers.
Giordano- CLUB
- Messages : 942
Re: Curtiss P-1 Hawk
P-3 and P-5 test variants
The P-3 Hawk was similar to the P-1 Hawk but with a radial [Vous devez être inscrit et connecté pour voir ce lien].
The first of the type, designated XP-3A, was the last P-1A (serial 26-300). Originally intended to be powered by a 390 hp (291 kW) Curtiss R-1454, the engine was deemed unsatisfactory and the 410 hp (306 kW) Pratt & Whitney R-1340 engine substituted.
A second XP-3A (serial 28-189) included a [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien] to reduce the drag due to the radial engine; entered in the [Vous devez être inscrit et connecté pour voir ce lien] of 1929, its speed of 186.84 mph (300.69 km/h) gave it second place in the [Vous devez être inscrit et connecté pour voir ce lien] race[Vous devez être inscrit et connecté pour voir ce lien].
[Vous devez être inscrit et connecté pour voir ce lien]
The P-3 Hawk was similar to the P-1 Hawk but with a radial [Vous devez être inscrit et connecté pour voir ce lien].
The first of the type, designated XP-3A, was the last P-1A (serial 26-300). Originally intended to be powered by a 390 hp (291 kW) Curtiss R-1454, the engine was deemed unsatisfactory and the 410 hp (306 kW) Pratt & Whitney R-1340 engine substituted.
A second XP-3A (serial 28-189) included a [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien] to reduce the drag due to the radial engine; entered in the [Vous devez être inscrit et connecté pour voir ce lien] of 1929, its speed of 186.84 mph (300.69 km/h) gave it second place in the [Vous devez être inscrit et connecté pour voir ce lien] race[Vous devez être inscrit et connecté pour voir ce lien].
[Vous devez être inscrit et connecté pour voir ce lien]
Giordano- CLUB
- Messages : 942
Re: Curtiss P-1 Hawk
The remaining four craft were production P-3As, but primarily used to service test the [Vous devez être inscrit et connecté pour voir ce lien]
engine. In addition to the significant increase in drag, the radial
engine also interfered with the pilot's view. Addition of a [Vous devez être inscrit et connecté pour voir ce lien] cowling worsened the visibility problem, and had only a limited effect on speed[Vous devez être inscrit et connecté pour voir ce lien].
It was also tested with various types of deep-chord NACA cowls.[Vous devez être inscrit et connecté pour voir ce lien]
[Vous devez être inscrit et connecté pour voir ce lien]
Two of the XP-3A aircraft were re-engined in 1929 and 1930 with the [Vous devez être inscrit et connecté pour voir ce lien] engine. This aircraft was re-designated the XP-21.
Tests were run with this aircraft, but it was never developed into a production aircraft, despite the designation.[Vous devez être inscrit et connecté pour voir ce lien]
engine. In addition to the significant increase in drag, the radial
engine also interfered with the pilot's view. Addition of a [Vous devez être inscrit et connecté pour voir ce lien] cowling worsened the visibility problem, and had only a limited effect on speed[Vous devez être inscrit et connecté pour voir ce lien].
It was also tested with various types of deep-chord NACA cowls.[Vous devez être inscrit et connecté pour voir ce lien]
[Vous devez être inscrit et connecté pour voir ce lien]
Two of the XP-3A aircraft were re-engined in 1929 and 1930 with the [Vous devez être inscrit et connecté pour voir ce lien] engine. This aircraft was re-designated the XP-21.
Tests were run with this aircraft, but it was never developed into a production aircraft, despite the designation.[Vous devez être inscrit et connecté pour voir ce lien]
Giordano- CLUB
- Messages : 942
Re: Curtiss P-1 Hawk
Five P-5 Superhawks, similar to the P-1C but with a turbocharged V-1150-3 engine, were delivered in 1928.
They had a top speed of 166 mph (267 km/h) at 25,000 ft (7,620 m), considerably higher than the maximum ceiling of the P-1A, but their low-level performance was inferior
They had a top speed of 166 mph (267 km/h) at 25,000 ft (7,620 m), considerably higher than the maximum ceiling of the P-1A, but their low-level performance was inferior
Giordano- CLUB
- Messages : 942
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