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.

One of the first aircraft designed as a luxury tourer and aimed in part at the owners and CEOs of large companies as their personal transport was the de Havilland Dragonfly of 1936.

There were hopes of an order for a military multi-engine trainer development with a retractable undercarriage, but the Netherlands Army Air Service (LVA) bought Focke-Wulf Fw 58s instead[2] and no more were built.

On 22 September 1938 the F.K.57 headed out from Ypenburg with de Kok on board to fly to Shell's oil interests in the Dutch East Indies and beyond.

The F.K.57 was wireless equipped and the news of the political crisis over Hitler's intention to annex the Czechoslovakian Sudetenland, which was resolved with the Munich agreement of 29 September 1938, was serious enough to cause them to return home, again in three days.