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In Memoriam

Klaas Willem Jonker
(Wilko)
† April 30, 2018

On Monday 30 April 2018, Wilko Jonker died after a long illness at the age of 58. He leaves behind a wife and two children. The Dutch military aviation and plastic modeling were his hobby and on this website he shared all the knowledge he has collected over the years. His hobby has been able to distract him from the persistent disease in his body until the last week of his life. The contacts with other hobbyists were a major support for him.

This website will be maintained by different people for as long as possible, so that other enthusiasts can continue to benefit from extensive content.

Koolhoven FK.46

Published: Monday, 20 June 2011 13:15 | Print | | Hits: 7584
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The LVA bought one example unit as a trainer. They wanted a little spicier and brighter version to test for use as a trainer for fighter pilots. It would thereby be used for practising aerobatics.

The LVA version was therefore modified and got both upper and lower wing ailerons and also the tail fin was reduced and also the tail surfaces were modified. The type could now be easier perform in a tailspin

Because of flying upside down behind the engine a little fuel tank was applied to provide the engine inverted flight with fuel. The aircraft made on April 2, 1937 the first flight.

Around the same time for the same purpose a Bücker Bu-131 Jungmann was purchased.
The Koolhoven proved to be inferior, and in mid-1937 it was sold back to Koolhoven, who eventually sold it to the South Sumatra club in Palembang.