Fokker XB-8

XB-8
XB-8
	XB-8 prototype
General information
Type	Bomber
Manufacturer	General Aviation Corporation.
Designer	Fokker
Primary user	United States Army Air Corps
Number built	7 (1 XB-8 + 2 YB-8 + 4 Y1B-8), all as Y1O-27
History
First flight	20 October 1930 as XO-27, February 1931 as XB-8

The Fokker XB-8 was a bomber built for the United States Army Air Corps in the 1930s, derived from the high-speed Fokker O-27 observation aircraft.

Design and development

Fokker O-27

During assembly, the second prototype XO-27 was converted to a bomber prototype, dubbed the XB-8. While the XB-8 was much faster than existing biplane bombers, it did not have the bomb capacity to be considered for production. Two YB-8s and 4 Y1B-8s were ordered, but these were changed mid-production to Y1O-27 configuration.

The wing of the XB-8 and XO-27 was built entirely from wood, although the fuselage was constructed of steel tubes covered with fabric with the exception of the nose which had a corrugated metal.^[1] They featured the first retractable landing gear ever fitted to an Army Air Corps bomber or observation craft. The undercarriage retracted electrically. The crew was three in tandem position.^[1]

Operational history

It competed against the Douglas Y1B-7/XO-36. Both promised to greatly exceed the performance of the large biplane bombers then used by the Army Air Corps. However, the Douglas XB-7 was markedly better in performance than the XB-8, and no further versions of Fokker's aircraft were built.

Operators

United States

United States Army Air Corps

Specifications (XB-8)

Data from Fokker's Twilight.^[2]

General characteristics

Crew: 4
Length: 47 ft 4 in (14.42 m)
Wingspan: 64 ft 4 in (19.60 m)
Height: 11 ft 6 in (3.50 m)
Wing area: 619 sq ft (57.5 m²)
Empty weight: 6,861 lb (3,112 kg)
Gross weight: 10,650 lb (4,824 kg)
Powerplant: 2 × Curtiss V-1570-23 "Conqueror" V12 engines, 600 hp (450 kW) each

Performance

Maximum speed: 160 mph (260 km/h, 140 kn)

References

Notes

^ ^a ^b ^c Cellier Flight 23 August 1934, p. 864
^ Pelletier 2005, p. 64.

Bibliography

Cellier, Alfred (23 August 1934). "American Military Monoplanes". Flight. Vol. XXVI, no. 1339. pp. 862–865. Retrieved 9 January 2024.
Pelletier, Alain J. "Fokker Twilight". Air Enthusiast, No. 117, May/June 2005, pp. 62–66. ISSN 0143-5450.
Wagner, Ray. American Combat Planes. New York: Doubleday, 1982. ISBN 0-930083-17-2.

External links

O-27 USAAS 1000 Aircraft Photos^{[permanent dead link]}
Army's Mystery Plane Passes Speed Test – Popular Science
Atlantic (Fokker) XB-8 – National Museum of the US Air Force

[Flight864-1] Cellier Flight 23 August 1934, p. 864

[Pel_p64-2] Pelletier 2005, p. 64.

[1]

[2]