VH-ZSE Colomban MC-15J Cri-Cri Jet owned by Isak Van Heerden, at Sport Aircraft Builders Club (SABC) Annual Fly-In, Serpentine Airfield – 17 October 2021. The Cri-Cri is the smallest twin-engined, manned jet aircraft in the world, at 4.6 metres long, with a 5.3-metre wingspan. This one was built in 2011 by Sakkie Van Heerden/Dawie Botes, (MSN SD2) and first flew on 18 February 2012, with JPX PUL 212 piston engines. In 2015, it was fitted with two Czech-built PBS VB TJ20A jet engines. Each engine weighed only 2.1kg and produced 20kg of thrust. At idle, the engine turned at 35,000 RPM and at max power, 120,000 RPM. The two engines together consumed 1.3 Litres per minute. and the engines had to be overhauled every 50 hours of operating time. Max speed was 120 knots and cruise speed 100 knots, and range was 65 nautical miles. By 2021, it had been converted again, to use two German Jetcat 300 turbojets of 30N thrust, as seen here. Photo © David Eyre.