Koolhoven FK-51 * Retired *
15 aircraft received 1936 - 1937. Biplane basic/primary trainer. Serialled E-1 to E-15. Two more examples received May 1939 as attrition replacements - duplicating the original serials. All destroyed 10 May 1940 by enemy action.
E-1 to E-6 ordered 1 Aug 1936, E-7 to E-15 ordered 18 June 1937, E-1(II) and E-6(II) ordered 20 Sept 1938.

Serial	c/no.	Prev. Identity	Delivered	Fate/Notes
E-1	51.12		1936	Accident 10 May 1938 near Eelde
E-2	51.13		1936	Destroyed by bombing 10 May 1940 at De Kooy
E-3	51.14		1936	Destroyed by bombing 10 May 1940 at De Kooy
E-4	51.15		1936	Destroyed by bombing 10 May 1940 at De Kooy
E-5	51.16		1936	Destroyed by bombing 10 May 1940 at De Kooy
E-6	51.30		1936	Accident 11 May 1938 near Breezand
E-7	51.53		1937	Destroyed by bombing 10 May 1940 at De Kooy
E-8	51.54		1937	Destroyed by bombing 10 May 1940 at De Kooy
E-9	51.55		1937	Destroyed by bombing 10 May 1940 at De Kooy
E-10	51.56		1937	Destroyed by bombing 10 May 1940 at De Kooy
E-11	51.57		1937	Destroyed by bombing 10 May 1940 at De Kooy
E-12	51.58		1937	Destroyed by bombing 10 May 1940 at De Kooy
E-13	51.59		1936	Destroyed by bombing 10 May 1940 at De Kooy
E-14	51.60		1936	Destroyed by bombing 10 May 1940 at De Kooy
E-15	51.61		1936	Destroyed by bombing 10 May 1940 at De Kooy
E-1 (II)	51.124		May 1939	Destroyed by bombing 10 May 1940 at De Kooy
E-6 (II)	51.125		May 1939	Destroyed by bombing 10 May 1940 at De Kooy

References:

• 70 Jaar Marineluchtvaartdienst by N. Geldhof (1987)
• Air Britain Digest May-June 1978
• FK-51, Koolhoven