Hüffer HK 39
| Hüffer HK 39 | |
|---|---|
| Type: | Travel, sport and training aircraft |
| Design country: | |
| Manufacturer: | |
| First flight: |
- |
| Commissioning: |
- |
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The Hüffer HK 39 was a planned travel, sport and training aircraft by Julius Hüffer .
The aircraft was designed in 1939 as a cantilever low- wing aircraft in a mixed construction and with a tail wheel landing gear, whereby both a version with covered wheels and a version with a retractable landing gear were examined. The wing should be designed in three parts and made of wood. It was planned to fix the wing center section firmly to the fuselage, while the wing outer parts should be removable in order to save space. The paneling of the wing should be made of plywood and partially covered with fabric. The self-supporting tail unit was also constructed from plywood. While the rudder surfaces should be covered with fabric, plywood planking of the fins was planned. The fuselage was a construction made of welded steel tube, which was to be planked with sheet metal in the front area. Behind the cabin, however, the fuselage was covered with fabric. The pilots should be seated side by side with double controls in a closed cabin.
The aircraft was to be powered by an air-cooled four-cylinder Hirth HM 515 engine with 62 hp via a non-adjustable wooden propeller with a diameter of 2 m. Despite the aircraft's advanced design, it remained in the project stage due to the outbreak of World War II and was not built.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1 |
| Passengers | 1 |
| length | 7.0 m |
| span | 10.0 m |
| height | 2.46 m |
| Wing area | 13.5 m² |
| Wing extension | |
| payload | |
| Empty mass | 310 kg |
| Max. Takeoff mass | 550 kg |
| Cruising speed | |
| Top speed | 185 km / h |
| Service ceiling | 4000 m |
| Range | 650 km |
| Engines | 1 × Hirth HM 515 |
literature
- Heinz J. Nowarra : The German Air Armament 1933-1945. Bernard & Graefe Verlag, Koblenz 1993, ISBN 3-7637-5464-4 .