The Hiro H4H (or Hiro Navy Type 91 Flying Boat) was a 1930s Japanese bomber or reconnaissance monoplane flying boat designed and built by the Hiro Naval...

H4H may refer to: Habitat for Humanity, an international housing charity Help for Heroes, a British veteran's organization Hiro H4H, a Japanese interwar...

II Hiro H4H - flying boat Prototypes and experimental aircraft: Hiro R-3 - flying boat, 1 example built Hiro H3H1 - flying boat, 1 example built Hiro H10H...

Navy flying boat maritime reconnaissance Hiro H3H 1 1931 Navy flying boat maritime reconnaissance Hiro H4H 47 1933 Navy flying boat maritime reconnaissance...

Navy Hiro G2H land-based bomber in 1933. The Type 94 engine was the eighteen-cylinder version of the Hiro Type 90 600 hp water-cooled W-12/Hiro Type 91...

reconnaissance seaplane Hiro H1H maritime reconnaissance bomber flying boat Hiro H2H maritime reconnaissance bomber flying boat Hiro H4H maritime reconnaissance...

The Hiro G2H (or Hiro Navy Type 95 Twin-engined Land-based Attacker) was a 1930s Japanese bomber or reconnaissance monoplane designed and built by the...

powerful engine, the Hiro Type 90 600 hp water-cooled W-12 had also been developed, producing 600 hp. Aichi E10A Aichi E11A Hiro H4H Kawanishi E7K Mitsubishi...

Operational 65 Hiro H2H Japan Maritime patrol flying boat 1930 Operational 17 Hiro H4H Japan Maritime patrol flying boat 1931 Operational 47 Hispano HA-200 Spain...

USA 1929 24 Harbin SH-5 China 1976 6 Hawker-Siddeley Nimrod UK 1967 51 Hiro H4H Japan 1931 47 IAI 1124N Sea Scan Israel 1977 4 IAI Heron Israel 2005 UAV...