page_title: De Havilland Hercules
section_title: Specifications (DH.66A)
hierarchical_section_title: De Havilland Hercules / Specifications (DH.66A)
caption_attribution_description: English: De Havilland DH.66 3 view drawing from NACA Aircraft Circular No.10
context_page_description: The de Havilland DH.66 Hercules was a 1920s British seven-passenger, three-engined airliner built by de Havilland Aircraft Company at Stag Lane Aerodrome. As a more modern replacement for the D.H.10s used on the RAF's airmail service, Imperial Airways used the Hercules effectively to provide long-distance service to far-flung regions. Although the giant airliners were slow and cumbersome, they pointed the way for future airliners.
context_section_description: Data from de Havilland aircraft since 1909
  General characteristics
  Crew: 3
  Capacity: 7 passenger and up to 465 cu ft (13.2 m³) of mail
  Length: 55 ft 6 in (16.92 m)
  Wingspan: 79 ft 6 in (24.23 m)
  Height: 18 ft 3 in (5.56 m)
  Wing area: 1,547 sq ft (143.7 m²)
  Empty weight: 9,060 lb (4,110 kg)
  Gross weight: 15,660 lb (7,103 kg)
  Powerplant: 3 × Bristol Jupiter VI 9-cylinder air-cooled radial piston engine, 420 hp (310 kW)  each
  Propellers: 2-bladed fixed-pitch propellers
  Performance
  Maximum speed: 128 mph (206 km/h, 111 kn)
  Cruise speed: 110 mph (180 km/h, 96 kn)
  Service ceiling: 13,000 ft (4,000 m)
  Rate of climb: 765 ft/min (3.89 m/s)
caption: De Havilland DH.66 3 view drawing from NACA Aircraft Circular No.10
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