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DH4 Technical Specifications

DeHavilland 4 fuselage structurePhysical Description:


Two-seat, single-engine World War I biplane observation and bomber aircraft; 400-horsepower Liberty V-12 water-cooled engine. American-built version of a British design. Fuselage light grey on sides, olive green on top.

Country of Origin

United States of America

Manufacturer

Dayton-Wright Airplane Co.

Date

1917-1918

Materials

Airframe: Wood

Covering: Fabric

General characteristics

  • Crew: two
  • Length: 30 ft 8 in (9.35 m)
  • Wingspan: 43 feet 4 in (13.21 m)
  • Height: 11 ft (3.35 m)
  • Wing area: 434 ft² (40 m)
  • Empty weight: 2,387 lb (1,085 kg)
  • Loaded weight: 3,472 lb (1,578 kg)
  • Powerplant: 1 × Rolls-Royce Eagle VII inline liquid cooled piston, 375 hp] (289 kW)

 

Performance

 

Armament

 

United States variants

  • DH-4 : Two-seat day bomber biplane, built in the United States.
  • DH-4A : Civil version, built in the United States.
  • DH-4B : Rebuilt version of Liberty powered DH-4 for U.S. Air Service. Pilot's cockpit relocated to behind fuel tank, adjacent to observer's cockpit. 
      • DH-4B-1 : Increased fuel capacity (110 US gal/420 L).
      • DH-4B-2 : Trainer version.
      • DH-4B-3 : Fitted with 135 US gal (511 L) fuel tank
      • DH-4B-4 : Civil version
      • DH-4B-5 : Experimental civil conversion with enclosed cabin.
    • DH-4BD :Cropdusting version of DH-4B
    • DH-4BG : Fitted with smokescreen generators
    • DH-4BK : Night flying version
    • DH-4BM: Single seat version for communications 
      • DH-4BM-1 : Dual control version of BM
      • DH-4BM-2 : Dual control version of BM
    • DH-4-BP : Experimental photo reconnaissance version 
      • DH-4-BP-1 : BP converted for survey work
    • DH-4BS : Testbed for supercharged Liberty
    • DH-4BT : Dual control trainer
    • DH-4BW : Testbed for Wright H engine
  • DH-4C : 300 hp (220 kW) Packard engine
  • DH-4L : Civil version
  • DH-4M : Rebuilt version of DH-4 with steel tube fuselage.
  • DH-4Amb : Ambulance.
  • DH-4M-1 - postwar version by Boeing (Model 16) with new fuselage, designated O2B-1 by Navy 
    • DH-4M-1T - Dual control trainer conversion of DH-4M
    • DH-4M-1K - target tug conversion
    • O2B-2 - cross-country and night flying conversion for Navy
  • DH-4M-2 - postwar version by Atlantic
  • L.W.F. J-2 - Twin-engine long range development of DH-4 (also known as Twin DH), powered by two 200 hp (150 kW) Hall-Scott-Liberty 6 engines and with wingspan of 52 ft 6 in (16.04 m); 20 built for U.S. Post Office, 10 for U.S. Army.
The "Liberty Plane" Restoration Project is from
the "Friends Of Jenny" organization.