Manufacturer

Hopfner

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Austria
This was the first Austrian company to manufacture an airplane after the First World War; the Hopfner S.1 three seat monoplane. A developed version with Gipsy Major engine was designated HS-1033. Hopfner also produced the HA-1133 four-seat twin-engined amphibian before being taken over in 1935 by Hirtenberger Patronen, Zundhutchen und MetallwarenfabrikAG.

The company, the founder of which was the engineer Theodor Hopfner, specialized in performing charter flights from the Aspern airfield near Vienna. Most of the aircraft the company designed and built for its own needs.

Honningstad

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Norway
Established 1936, Honningstad designed and built the Norge Model A light transport aircraft in 1938. Designed a twin-engined, 12-passenger amphibian built by Norsk Flyindustri AS, as the Finnmark 5A, intended specifically for operation in the Northern and Arctic regions; only one prototype was completed. The Honningstad Polar C5 bush-plane was built in 1948 by Wideroes Flyveselskap OG Polarfly.

Honeywell

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LHTEC (Light Helicopter Turbine Engine Company) is a joint venture between Rolls-Royce and Honeywell founded in 1985. The company was originally a partnership between the Allison Engine Company and AlliedSignal Aerospace . In 1995 Rolls-Royce acquired Allison, and AlliedSignal merged with Honeywell in 1999, and adopted its name.

Hollman Aircraft

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Martin Hollman

As part of his Aeronautical Engineering thesis research he designed a set of aluminum rotor blades for a two-place gyroplane. Having designed a practical rotor system for a two-place gyro, he moved on to the design of a gyroplane to go with the new blades. The result was the Hollmann Sportster.

1980: 11082 Bel Aire Ct. Cupertino, CA 95014, USA.

1995-7: 3 Harris Ct., Bldg. S., Monterey, CA 93940, USA.
2009: 5 Harris Court, Bldg. S, Monterey, CA 93940, USA.