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Curtiss Model 76 / XA-14
In 1934, Curtiss began work on a brand new twin-engined attack aircraft, which received the designation Model 76 and the name “Shrike”. Originally built as an in-house venture as the Curtiss Model 76, the 76 was of all-metal construction with an oval section semi-monocoque fuselage, described as "pencil slim" with a fabric covering of ailerons, rudder and stabilizers. The main landing gear retracted into the engine nacelles, the rear wheel also retractable.
First flying on 17 July 1935, with the civil registration NX15314, the first multi-engine attack aircraft tested by the United States Army Air Corps at the Wright Field air base in Ohio, but in the fall it was returned to the company for improvements. Carrying a crew of two, it was as fast as the standard pursuit aircraft in service at the time.
The XA-14 was extensively tested, at one stage being fitted with a 37 mm (1.46 in) nose cannon. Powered by two experimental Wright XR-1510 radial engines, flight testing was sufficiently impressive that after the USAAC appraisal the Model 76 was returned to Curtiss and fitted with two 775 hp (578 kW) Wright R-1670-5 Cyclone engines with two-blade constant-speed propellers. This configuration was accepted by the Army with the designation XA-14 given to the sole example. It had standard Army markings with the serial number 36-146.
The Great Depression of 1929-1932 severely curtailed military allocations. The price of a single Wright engine was then $ 90,000, which was considered excessively expensive for mass construction.
On 23 July 1936, 13 pre-production versions, re-engined with two Wright R-1820-47 Cyclone twin-row radials with three-blade propellers, were ordered into production as the Y1A-18.
The only prototype XA-14 was initially planned to be used to set aviation records, but instead in June 1936 this aircraft was tested with a new 37-mm cannon (sometimes it was called YA-14). At the end of the year, it was dismantled for scrap after 158 hours of flight time.
Engines: 2 × Wright R-1670-5Whirlwind, 775 hp (578 kW) each
Wingspan: 59 ft 5 in (18.11 m)
Length: 40 ft 3 in (12.27 m)
Height: 10 ft 9 in (3.2.7 m)
Empty Weight: 3680 kg
Max takeoff weight: 11,750 lb (5,330 kg)
Maximum speed: 254 mph (221 kn, 409 km/h)
Cruising speed: 340 km / h
Range: 825 mi (717 nmi, 1,328 km)
Service ceiling: 27,100 ft (8,260 m)
Crew: two
4 × .30 in (7.62 mm) M1919 Browning machine guns forward-firing
1 × .30 in (7.62 mm) machine gun aft-firing
650 lb (295 kg) bombs in internal bay

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