
Описание
Страна : Нидерланды
Год : 1938
Единственный экземпляр
Single-seat fighter monoplane
Фотографии
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Air Enthusiast 1972-03 / Plane facts
The Koolhoven F.K.55 photographed prior to its single flight test.
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Jane's All the World Aircraft 1938 / 03 - All the world's aeroplanes
The Koolhoven F.K.55 Single-seat Fighter Monoplane (1,000 h.p. Lorraine "Sterna" engine driving two airscrews in opposite directions).
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Air Enthusiast 1972-03 / Plane facts
The Koolhoven F.K.55 during ground trials at Welschap airfield.
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Air Enthusiast 2001-01 / ??? - Salon Stars
A Dutch design that was much-studied at the Salon was the radical Koolhoven FK-55 fighter prototype. A single-seater, it was powered by a 12-cylinder Lorraine Petrel of 860hp (641kW) mounted in the centre-section and driving the two-unit, counterrotating, propellers via an extension shaft. Production FK-55s were to have been powered by a Lorraine Sterna of 1,200hp (895kW) and been fitted with a 20mm cannon in the propeller boss and four machine-guns in the wings. The FK-55 flew for the first and only time on June 30, 1938, for just a couple of minutes. It was fitted with fixed undercarriage for this flight, although a fully retractable unit was to be fitted to production examples.
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Flight 1936-11 / Flight
The sensational Koolhoven fighter with its twin airscrews and Lorraine Petrel engine mounted behind the pilot.
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Flight 1938-12 / Flight
The latest version of the Lorraine Sterna with extension shaft and oppositely rotating airscrews. This combination has been fitted in the Koolhoven F.K.55 fighter.
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Flight 1936-11 / Flight
TWIN-SCREW. The Koolhoven single-seater fighter to be shown at the Paris Salon has two airscrews revolving in opposite directions.
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Air Enthusiast 1972-03 / Plane facts
The arrangement of the power plant and extension shaft of the F.K.55.
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Flight 1936-11 / Flight
The method of driving the two airscrews of the Koolhoven (Lorraine Petrel).
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Flight 1936-11 / Flight
A cooling "gill" on the New Koolhoven fighter.
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Air Enthusiast 1972-03 / Plane facts
The F.K.55 in its proposed definitive form with retractable undercarriage.