If M. C. did get a chance to fly the FK-30 that would make two pilots to have done so.

I agree with topspeed that it is unusual for a Koolhoven aircraft not to look fat. However, it does fit the Koolhoven criteria of looking blooming odd/ugly.

The challenge aircraft first flew in 1927. It was meant for use by flying clubs, but was not a success, The only person to fly it was the designer.

Thank you Topspeed, a lucky guess really. Here is the next one, it certainly will not win any beauty contests.

Another wild guess – the Parnall Elf?

Pebsham airfield (aka X1HG Hastings) was, so I understand, situated at 50° 51′ 00 N – 0° 31′ 04 E

In late 1948 a 14 year lease was granted to East Sussex Air service Ltd. The lease stated that the company would build a terminal building accommodating; customs, a restaurant, control room and a flying club as well as a hanger for 6 aircraft and runways for aircraft carrying 8 passengers. Did any of this ever come about?

I thought that the race track proposal was in 1956/7.

Thanks Wout, that was an interesting challenge.

Here is the next one, somewhat more modern.

Fiesler Fi 253?