Hiro H1H

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H1H
15siki-hikouti.jpg
Role Patrol flying boat
National origin Japan
Manufacturer Hiro Naval Arsenal
First flight 1920s
Introduction 1920s
Retired 1938
Primary user IJN Air Service
Number built 65
Developed from Felixstowe F.5

The Hiro H1H (or Navy Type 15) was a 1920s Japanese bomber or reconnaissance biplane flying boat developed from the Felixstowe F.5 by the Hiro Naval Arsenal for the Imperial Japanese Navy. The aircraft were built by Hiro, the Yokosuka Naval Arsenal and Aichi.[1]

Design and development[edit]

Following licence-production of the Felixstowe F.5 for the Imperial Japanese Navy the company developed an improved version known as the H1H or Navy Type 15. The aircraft was built with three different engine types fitted, the Navy Type 15-1 had longer span upper wings and the Navy Type 15-II had four-bladed propellers. Both the H4H1 and H4H2 remained in front-line naval service through the 1930s.[1]

Variants[edit]

H1H1
Variant powered by two 450hp (336kW) Lorraine W-12 engines.
H1H2
Variant powered by either two 450hp (336kW) Lorraine W-12 or two 500hp (373kW) BMW VII engines.
H1H3
Variant powered by two 450hp (336kW) Lorraine W-12 engines.

Operators[edit]

 Japan

Specifications (H1H1)[edit]

Data from Illustrated Encyclopedia of Aircraft[1]

General characteristics

  • Length: 49 ft 7 in (15.11 m)
  • Wingspan: 75 ft 4½ in (22.97 m)
  • Height: 17 ft 0½ in (5.19 m)
  • Wing area: 1345.53 ft2 (125 m2)
  • Empty weight: 8862 lb (4020 kg)
  • Gross weight: 13448 lb (6100 kg)
  • Powerplant: 2 × Lorraine 12E 12-cylinder piston engine, 450 hp (336 kW) each

Performance

  • Maximum speed: 106 mph (170 km/h)
  • Endurance: 14 hours  30 min

Armament

  • 2 × 7.7 mm (0.303 in) machine guns (one at bow cockpit and one midships)
  • up to 300 kg (661 lb) of bombs

See also[edit]

Related lists

References[edit]

Notes[edit]

  1. ^ a b c Orbis 1985, p 2173

Bibliography[edit]

  • Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.