The HMPAC Puffin was a British man-powered aircraft designed by a team headed by John Wimpenny, an aerodynamicist at the de Havilland Aircraft Company.
It was built by the Hatfield Man Powered Aircraft Club (HMPAC) on the company's premises in Hatfield, Hertfordshire.
On 2 May 1962, Wimpenny, aged 39, piloted the Puffin at the Hatfield Aerodrome, pedalling to power the propeller, achieving a flight distance of 995 yd (910 m), a world record which was to stand for ten years.
After it had been damaged, the Puffin II airframe was given to Liverpool University, who used it to build the Liverpuffin.
Data from Jane's All The World's Aircraft 1962–63[3]General characteristics