| F.K.45 | |
|---|---|
 | |
| Role | Aerobatic aircraft |
| National origin | Netherlands |
| Manufacturer | N.V. Koolhoven Vliegtuigen |
| First flight | February 1932 |
| Number built | 1 |
The Koolhoven F.K.45 was an aerobatic biplane built to the requirements of one pilot who flew it at airshows in the mid-1930s. Only one was built.
The F.K.45 was the result of a 1931 order from René Paulhan, a French test pilot with Nieuport-Delage, for a light aerobatic aircraft. It was first flown in February 1932, though not delivered to Paulhan for two more years. It was a single bay biplane, with equal span, unswept wings of constant chord and strong stagger, braced with N-form struts and flying wires. Ailerons were mounted on both upper and lower wings. The upper wing of the F.K.45 was held above the fuselage by a pair of short, outward leaning N-form cabane struts to the upper fuselage longerons. The single seat cockpit, set in an opening in the otherwise continuous, rounded fuselage decking, was under the wing trailing edge where a rectangular cut-out enhanced visibility. Its tailplane was mounted on top of the fuselage; the fin was quadrant shaped and the straight edged rudder extended down to the keel. [1]
The F.k.45 was powered by a 115 hp (86 kW) Cirrus-Hermes IIB four cylinder inverted air-cooled inline, which drove a two blade propeller. Its undercarriage was of the fixed, conventional type, with the mainwheels on axles forming an inverted V and attached to the central fuselage underside. The main legs, with shock absorbers, were mounted on the upper longerons. There was a small tailwheel. [1]
The sole F.K.45 initially flew with the test registration Z1, then with the Dutch registration PH-AIF, [1] but when it was handed over to Paulan on 24 April 1934 [2] it was placed on the French register as F-AMXT. Paulhan displayed it at airshows over the next two years and then sold it. In August 1938, the F.K.45 had logged only fifty hours of flight. [1] It went on to two more owners [2] but its final fate is unknown. [1]
Data from Wesselink [1]
General characteristics
Performance
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