Hiro H1H

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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

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

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

Japan

Imperial Japanese Navy Air Service

Specifications (H1H1)

Data from ^[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 W-12 piston engine, 450 hp (336 kW) each

Performance

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

Armament

2 × 7.7mm (0.303in) Machine Guns (one at bow cockpit and one midships)
up to 300kg (661) bombs

References

Notes

↑ 1.0 1.1 1.2 Orbis 1985, p 2173

Bibliography

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

v t e Hiro Naval Arsenal

Aircraft designed and produced by Hiro	H1H H2H H4H G2H

Prototypes and experimental aircraft	R-3 H3H H10H

Aircraft designed by others produced at Hiro	Yokosuka B3Y Nakajima B5N "Kate" Aichi E13A "Jake" Yokosuka D4Y "Judy"

Engines designed and produced by Hiro	Type 14 Type 61 Type 91 Type 94

v t e Japanese Navy Flying Boats designation series

H1H H2H H3H/H3K H4H H5Y H6K H7Y H8K H9A HXC HXD HXP

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