ADDIMP 3D
Une création originale ADDIMP 3D
This model reproduces the Curtiss Hawk H-75 in these two versions A-1 to A-3 and A-4 / A-5 for
manufacturing in 3D printing.
It is your responsibility to manufacture all of the parts necessary for the construction of this model.
All files are provided in stl format, compatible with the majority of slicers softwares in the 3D
printing market.
1- History
The Curtiss H-75 Hawk was developed in the USA in the mid-1930s on the basis of the Curtiss P-36.
It was of the same generation as the Hawker Hurricane and Messerschmitt Bf 109. It was then part
of the generation of modern single-plane fighters, of all-metal construction.
The Model 75 was designed by engineer Donovan Berlin using Curtiss' own funds. The first
prototype was assembled in 1934, it was equipped with a 900 hp Wright XR-1670-5 engine and an
armament consisting of a 7.62 mm machine gun and another 12.7 mm, pulling through the
propeller disc. The landing gear was half embedded in the wing and rotated 90 °.
The prototype made its initial flight in May 1935, reaching 452 km / h at 10,000 feet (3,050 m) from
the first flights. He was escorted to Wright Field in May 1935 to participate in a competition
organized by the USAAC to choose his future fighter. The contest was postponed due to an accident
of the contestant proposed by Seversky. Curtiss took the opportunity to replace the engine with a
950 hp Wright XR-1820-39 Cyclone and to rework the fuselage.
The competition finally took place in April 1936. Unfortunately, the plane did not exceed 460 km/h,
the new engine being unable to provide the necessary power. The Seversky P-36, although more
expensive than the Curtiss fighter, and also showing disappointing performance, was still declared
the winner and ordered by the USAAC.
With the European context deteriorating very quickly, the USAAC feared that Seversky would be
unable to deliver his aircraft on time and decided to acquire a second fighter model. In June 1936
Curtiss received an order for three prototypes, designated Y1P-36. The new aircraft, designated
Model 75E, was powered by a 900 hp Pratt & Whitney R-1830-13 Twin Wasp and a canopy with
further improved rear visibility. His performance was such that he won the 1937 competition of the
USAAC, which ordered two hundred and ten P-36A fighters. The export version is designated H-75.
Obsolete even before the start of the Second World War, it was used by the British Commonwealth
(Mohawk), Argentina, Brazil, China, Finland, France, Iran, Norway, the Netherlands, Peru, Portugal
and Thailand. Over a thousand planes were built.
