Groschew GN-7

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Groschew GN-7
f2
Type: Glider
Design country:

Soviet Union 1923Soviet Union Soviet Union

Manufacturer:

Groshev

First flight:

1936

Production time:

1936/1937

Number of pieces:

≈15

The Groschew GN-7 ( Russian Грошев ГН-7 ), also G No. 7 (Г № 7) is a Soviet glider developed in the 1930s by G. F. Groschew .

commitment

The GN-7 was mainly used by the OSSOAWIACHIM flying clubs . In May 1937 Viktor Rastorgujew set a national record in free cross-country flight with a GN-7, which he broke twice within a few days. On May 5, he covered a distance of 539.6 km from Tuschino , on May 15, with 602.2 km, he was the first Soviet glider pilot to cross the 600 km mark, which also meant a world record May at 652.0 km. Only two years later could he be hired by Olga Klepikowa .

One specimen came to Hungary during the Second World War , flew there with the registration number HA-4040 and was destroyed in a crash landing. In addition to the GN-7, the designer Groschew also developed two of the first Soviet cargo gliders, the GN-4 and GN-8 .

construction

The GN-7 is a cantilever monoplane in wood construction . The fuselage and the wing center section form a structural composite. The latter is designed to rise upwards, so that it forms a gull wing together with the outer surfaces that are just adjoining it. The tail unit is also self-supporting, with the horizontal stabilizer placed very far in front of the vertical fin. The landing gear consists of a wooden skid under the fuselage and a grinding spur on the stern.

Technical specifications

Parameter Data
crew 1
span 16.80 m
length 6.35 m
height
Wing area 12.8 m²
Wing extension 22.0
Wing loading 23.8 kg / m²
Empty mass 200 kg
Takeoff mass 305 kg
Glide ratio 28
slightest sinking 0.80 m / s
profile Gö 549

literature

  • Martin Simons: Gliders . 1945-1965. 4th edition. Eqip, Bonn 2017, ISBN 3-9807977-3-2 , p. 246 u. 248 .

Web links

Individual evidence

  1. ↑ a b Gerhard Wissmann: Adventure in wind and clouds. The history of gliding . Transpress, Berlin 1988, ISBN 3-344-00275-9 , pp. 303/304 u. 348 .