Curtiss P-36 Hawk - Variants

Variants

Model 75A

Company-owned demonstrator aircraft flown with several engine fits

Model 75B

Prototype with Wright R-1820 radial engine

Model 75D

First prototype, Wright Whirlwind R-1670 radial

Model 75I

Company designation for the P-37.

Model 75H

Internal company designation for a simplified export version with fixed landing gear, two slightly differing aircraft built, first sold to China, second to Argentina

Model 75J

Company-owned 75A temporarily fitted with an external supercharger

Model 75K

Unbuilt version, intended to use the Pratt & Whitney R-2180 Twin Hornet radial.

Model 75P

Production P-36A (serial 38-010) fitted with Allison V-1710 liquid-cooled engine, prototype for Curtiss P-40

Model 75R

Company-owned 75A temporarily fitted with R-1830-SC2-G with turbo-supercharger, attained 330 mph (530 km/h) but proved complex and unreliable

Y1P-36 (Model 75E)

USAAC prototype, Pratt & Whitney R-1830

P-36A (Model 75L)

USAAC version, P-36A-3 mounted four .30 in (7.62 mm) machine guns in the wings in addition to fuselage armament

P-36B

production P-36A fitted with an R-1830-25 producing 1,100 hp (820 kW), reached 313 mph (504 km/h), returned to original P-36A configuration

P-36C

An additional 0.30 in machine gun installed in each wing with external ammunition boxes under the wings, R-1830-17 of 1,200 hp (890 kW); last 30 production aircraft were completed as P-36Cs

XP-36D

Production P-36A modified with two .50 in (12.7 mm) machine guns in the nose and four 0.30 in machine guns in the wings

XP-36E

Production P-36A armed with four 0.30 in machine guns in the wings, retained standard fuselage guns

XP-36F

Production P-36A fitted with two 23 mm (0.91 in) Madsen autocannons under the wings, reverted to P-36A because guns imposed an unacceptable performance penalty with top speed of only 265 mph (426 km/h).

P-36G

Hawk 75A-8 used by Norway for training in Canada; later delivered to Peru. R-1820-G205A of 1,200 hp.

Hawk 75A-1

First production batch for France, four 7.5 mm (0.295 in) machine guns, R-1830-SC-G of 900 hp (670 kW); 100 built

Hawk 75A-2

Second production batch for France, either R-1830-SC-G or 1,050 hp (780 kW) R-1830-SC3-G, six 7.5 mm machine guns; 100 built

Hawk 75A-3

Third production batch for France, similar with Hawk 75A-2; 135 built (133 delivered).

Hawk 75A-4

Last production batch for France, Hawk 75A-2 with Wright R-1820-G205A Cyclone radial with 1,200 hp: 285 built, 81 delivered to France; others to Great Britain as Mohawk IV

Hawk 75A-5

Similar to Hawk 75A-4. Built under license in China (production was later moved to India), absorbed into RAF as Mohawk IV

Hawk 75A-6

Version for Norway; aircraft captured during the German invasion were eventually sold to Finland

Hawk 75A-7

Version for Netherlands East Indies: 1,200 hp Cyclone, one .5 in (12.7 mm) and one .303 in (7.7 mm)in cowl and two .303 in (7.7 mm)in wings; later four .303 in (7.7 mm) (two in nose, one in each wing) and six 50 lb (23 kg) bombs.

Hawk 75A-8

Export version for Norway. Later redesignated P-36G.

Hawk 75A-9

10 aircraft delivered to Persia, captured still in crates and used by RAF in India as Mohawk IVs

Hawk 75M

Simplified version with fixed landing gear and Wright R-1820 Cyclone for China, built by both Curtiss and Central Aircraft Manufacturing Company in China

Hawk 75N

Simplified version for Siam (Thailand) with non-retractable landing gear and wheel pants.

Hawk 75O

Simplified version for Argentina, 30 built and delivered by Curtiss with additional 200 to be built under license locally by Fabrica Militar de Aviones, however only 20 were completed.

Hawk 75Q

Two additional simplified demonstrators for China. At least one is reputed to have been given an armament similar to that of the XP-36F and to have engaged in combat over Shanghai during the Japanese attacks in September 1937, reportedly shooting down several bombers before being brought down with the loss of the American pilot.

XP-37

Allison V-1710 inline, cockpit moved to the rear of the fuselage

YP-37

Service test version of XP-37, 13 built

XP-42 (Model 75S)

Testbed for streamlining cowlings around air-cooled engines