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Role Patrol flying boat
National origin United States of America
Manufacturer Hall-Aluminum Aircraft Corporation
First flight November 15, 1932
Primary user United States Navy
Number built 1

The Hall XP2H-1 was an American prototype four-engined biplane flying boat of the 1930s. Intended as an experimental very long range maritime patrol aircraft, a single example was built. The XP2H-1 was the largest four engine biplane aircraft ever procured by the US Navy.[1]

Development and design[edit | edit source]

In 1930, the United States Navy ordered a single example of a large flying boat from the Hall-Aluminum Aircraft Corporation, to meet a requirement for an experimental very-long range patrol aircraft. The resulting design was designated XP2H-1 and was a four engined biplane. It had an all-aluminium hull, a scaled up version of that used in Hall's smaller PH flying boat, which accommodated a crew of six. The wings were of fabric skinned aluminium construction and were of trapezoidal shape. The engines, Curtiss V-1570 Conquerors were mounted in tandem push-pull pairs between the wings.[2][3] The XP2H-1 first flew on November 15, 1932, and was extensively tested, demonstrating excellent performance, being 11 mph (18 km/h) faster than predicted.[4] It was possible to cruise on just two engines to extend range, and in 1935, the XP2H-1 was used to carry out a non-stop flight between Norfolk, Virginia and Coco Solo, Panama Canal Zone in 1935, taking 25 hours and 15 minutes to fly the 2,000 miles (3,200 km).[5] It was destroyed later in the year attempting a landing in open water.[6] No further P2Hs were built, with the US Navy equipping its patrol squadrons with smaller flying boats such as the Consolidated P2Y.

Operators[edit | edit source]

United States

Specifications[edit | edit source]

Data from General Dynamic Aircraft and their Predecessors [4]

General characteristics

  • Crew: 6
  • Length: 64 ft 6½ in (19.68 m)
  • Wingspan: 112 ft 0 in (34.15 m)
  • Height: 25 ft 6 in (7.77 m)
  • Wing area: 2,742 ft² (254.8 m²)
  • Empty weight: 20,856 lb (9,840 kg)
  • Loaded weight: 35,393 lb (16,087 kg)
  • Max. takeoff weight: 43,193 lb (19,633 kg)
  • Powerplant: 4 × Curtiss V-1570-54 Conqueror V-12 water cooled, 600 hp (448 kW) each


  • Maximum speed: 121 knots (225 km/h, 139.6 mph) at sea level
  • Cruise speed: 104 knots (193 km/h, 120 mph)
  • Range: 1,870 nmi (3,462 km, 2,150 mi)
  • Ferry range: 2,913 nmi(5,394 km, 3,350 mi)(maximum range)
  • Service ceiling: 10,900 ft (3,320 m)
  • Climb to 5,000 ft (1,525 m): 8.7 min


  • Guns: Five flexibly mounted 0.3 in Browning machine guns in nose, dorsal waist and tail positions
  • Bombs: 2,000 lb (909 kg) bombs

See also[edit | edit source]

References[edit | edit source]

  1. Test Pilot AIRPOWER, September 1974 pp. 11-12
  2. Wegg 1990, pp.113-114.
  3. Flight January 24, 1935, p.94.
  4. 4.0 4.1 Wegg 1990, p.114.
  5. Flight 21 February 1935, p.195.
  6. Loftin 1985, Chapter 8: Boats in the Sky :Biplane Flying-Boat Developments, 1920-30.

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