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The Koolhoven F.K.57 was a twin-engined gull-winged monoplane built in the Netherlands as a personal transport for the Director General of Royal Dutch Shell. Only one was made flying chiefly in Europe in the year before World War II but destroyed when Germany invaded the Netherlands in May 1940.

* Koolhoven F.K.57The section of wing inboard of the undercarriage had spars which were an integral part of the fuselage structure.1

Made by KoolhovenN.V. Koolhoven VliegtuigenRotterdam.

The Koolhoven F.K.57 Four-seat Cabin Monoplane (two 205 h.p. D.H."Gipsy-Six" Series II engines).2
Wing Area Sqm
24
Designer
Frederick Koolhoven
Eng 1 Type
6
Cruise Speed Kmh
Cruise Speed Note
109800.0
Range Km
1400
Max Speed Note
at sea level. All performance figures are estimates.
Capacity
2
Number Built
1
Crew
1
Empty Weight Kg
1380
Gross Weight Kg
2160
Span M
13
Primary user
J.E.F. de Kok
Climb Rate Note
initial rate
Climb Rate Ms
6
Manufacturer
Koolhoven
N.V. Koolhoven Vliegtuigen
Rotterdam
First Flight
20
Eng 1 Name
de Havilland Gipsy Six Series II
Max Speed Kmh
280
Origin
Netherlands
National Origin
Netherlands
Height M
2
Prime Units
met
Ceiling M
6000
Eng 1 Hp
205
Eng 1 Number
2
Length M
9
Category
Dutch civil aircraft 1930-1939
Koolhoven aircraft

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