Koolhoven Aeroplanes Foundation
Preserving the work of the Dutch airplane constructor Frederick Koolhoven (1886-1946)

Introduction

On May 10 1940, the invasion of The Netherlands, German bombers took off to cripple the Dutch airfields. At the airport Waalhaven of Rotterdam, the N.V. Koolhoven Aeroplanes was their first target. The factory was laid in ashes. Airplanes, drawings, documents, photographs, all was lost.

Today Frederick Koolhoven (pronounced: "Coalhoven") and his designs have almost been forgotten, but in its days, with 1200 employees and a well filled order-book, his factory was certainly as important as our 'national pride' Fokker.

The Koolhoven factory in 1938

Koolhoven's work was very innovative and visionary. In 1919, when passenger planes were all converted military planes, he built the B.A.T. F.K.26 'Commercial', the world's first aircraft specifically designed for commercial aviation, or the world's first airliner. His F.K.41 was one of the world's first high winged sportscoupes. The F.K.55, a contra propelled fighter, was unquestionably his most spectacular design.
Some of his designs became a great success, some were failures. Yet, many times these failures possessed features that were far ahead of their time. From Koolhoven's designs nearly 3000 airplanes were built.

It's the Foundation's goal to assure Koolhoven's deserved place in history. First priority in this is to gather as much remaining material as possible. Thanks to institutional archives and gifts from personal possessions, the Foundation has been able to form the most comprehensive archive and collection on Koolhoven. - Still it happens that material is thrown away, because people are just not aware of its historical value. Making the Foundation known hopefully prevents further loss of valuable material. - Interviews with former employees or other people who can give information from their own experience, are also appreciated sources.
Working at the files, sorting out all the information, takes a lot of time. It is needed first to make the building of replicas possible. Though the Foundation's files do contain drawings of some types, there are no complete sets. Building the desired replicas depends heavily on research.

Only one original Koolhoven has survived, a B.A.T. F.K.23 'Bantam' which is restored by volunteers of the Koolhoven Aeroplanes Foundation.

The Koolhoven Aeroplanes Foundation (Stichting Koolhoven Vliegtuigen) is founded in 1989 by aviation enthusiast Jan den Das, aviation historian Theo Wesselink and technical curator Harry van der Meer.

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