Gerner G.I
| Gerner G.I | |
|---|---|
| Role | Sport and touring biplane |
| National origin | Germany |
| Manufacturer | Behrens, Gerner and Koch, Frankfurt |
| Designer | Max Gerner |
| First flight | late 1928 |
| Number built | 1 |
| Developed into | Gerner G II R |
The Gerner G.I or Gerner G I, was a small, low powered, two seat biplane of steel tube construction, built in Germany in 1928. Only one was produced but the design led to the more successful Gerner G II R.
The G.I was Max Gerner's first attempt at a popular two seat light aircraft which would be both robust and cheap to buy and maintain. It therefore had a metal girder frame and fabric covering; to keep the cost of purchase and repair down, he used standard sized steel tubing, welded together. It was a small single bay biplane with equal span, strongly staggered wings which were braced with slightly outward leaning N-form interplane struts and centrally supported by a pair of similar form cabane struts from wing spars to the upper fuselage longerons. In plan the wings were rectangular, with externally connected ailerons on both planes. Each single piece wing was built around two tubular spars with six cross members in the upper planes and four below. Edges and tips were defined by finer tubes, spot welded to the main structure; the trailing edges were formed by wire.
To keep the cost low the G.I was powered by a three cylinder Anzani radial engine which produced about 26 kW (35 hp). It was air cooled, cowled with projecting cylinder heads, the upper one upright. Behind it the fuselage, also a tube steel structure, had a rectangular cross-section though with a lightly curved upper surface. The separate cockpits were in tandem with the forward one between the wings and covered over in some test flights; the rear seat, from which the aircraft was flown solo, was over the lower wing trailing edge, from where the stagger and a semicircular trailing edge cut-out assisted the pilot's upward view. The forward cockpit could be equipped with a second set of controls. The rear surfaces were straight edged, with constant chord and semicircular tips. The tailplane was mounted on top of the fuselage and the elevators had a large cut-out for rudder movement, as the latter extended downwards to the keel. The fin was wire braced to both fuselage and tailplane.
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