Curtiss A 8

Development

The XA-8 won a competition against the General Aviation/Fokker XA-7, after which 13 service test aircraft were ordered (five as YA-8s and eight as Y1A-8s). After the completion of testing, 11 of these aircraft were redesignated A-8.

The A-8 was the first Curtiss machine of all-metal low-wing monoplane configuration with advanced features such as automatic leading edge slats and trailing-edge flaps.

Four forward-firing .30 in (7.62 mm) machine guns were mounted in the wheel fairings, and an additional weapon of the same calibre was fitted in the observer's cockpit for rear defense. The standard bomb load was four 100 lb (45 kg) bombs.

One YA-8 was fitted with a radial engine and designated YA-10, while another was used for testing of the Curtiss V-1570 Conqueror engine as the Y1A-8A. This aircraft was redesignated A-8 upon the completion of testing.

46 aircraft were ordered as A-8Bs, however the order was changed to the Model 60 A-12s before production began.

Operational history

The A-8 created a sensation in US aviation circles when it went into service with the 3rd Attack Group at Fort Crockett, Texas in April 1932. All other standard aircraft were of biplane configuration, and the first monoplane fighter (the Boeing P-26A) did not become operational until eight months later.

Variants

XA-8

Model 59, one prototype, serial number 30-387, length 32 ft 6 in (9.9 m), wingspan 44 ft (13.4 m), gross weight 5,413 lb (2,455 kg) Curtiss V-1570-23 direct drive engine

YA-8

service test aircraft, 5 built, serial numbers 32-344 to 32-348, gross weight 5,706 lb (2,588 kg), one was reworked as the YA-10 prototype with the 625 hp (466 kW) Pratt & Whitney Hornet radial engine

Y1A-8

service test aircraft, 8 built, gross weight 5,710 lb (2,590 kg)

A-8

12 redesignated YA-8 and Y1A-8 aircraft

Y1A-8A

last Y1A-8 with Curtiss V-1570-57 geared engine, length 33 ft 7 in (10.24 m), gross weight 6,287 lb (2,852 kg)

A-8A

redesignated Y1A-8A aircraft

A-8B

cancelled, replaced by A-12 Shrike

Operators

 United States

United States Army Air Corps

Specifications (YA-8)

Data from Curtiss Aircraft 1907–1947

General characteristics

Crew: Two

Length: 32 ft 10 in (10.00 m)

Wingspan: 44 ft 0 in (13.41 m)

Height: 9 ft 0 in (2.74 m)

Wing area: 256 sq ft (23.78 m²)

Empty weight: 3,910 lb (1,777 kg)

Loaded weight: 5,888 lb (2,676 kg)

Powerplant: 1 × Curtiss V-1570-31 Conqueror Vee, 600 hp (447 kW)

Performance

Maximum speed: 183 mph (159 knots, 295 km/h)

Cruise speed: 153 mph (133 knots, 246 km/h)

Range: 480 mi (417 nmi, 773 km)

Service ceiling: 18,100 ft (5,500 m)

Rate of climb: 1,325 ft/min (6.7 m/s)

Armament

Guns:

4 × forward-firing 0.3 in (7.62 mm) M1919 Browning machine guns were mounted in the wheel fairings

1 × 0.3 in (7.62 mm) machine gun mounted in the observer's cockpit for rear defense

Bombs: Up to 4 × 100 lb (45 kg) bombs carried under the wings or up to 10 × 30 lb (13.6 kg) fragmentation bombs in fuselage chutes either side of the main fuel tank