However, it should be stessed that it was only the first human powered orthinopter.
From Wiki:
The first officially authenticated take-off and landing of a man powered aircraft (one capable of powered take-offs, unlike a glider) was made on 9 November 1961 by Derek Piggott in Southampton University's Man Powered Aircraft (SUMPAC). The best flight out of 40 tried was 650 metres[6]. The SUMPAC was substantially rebuilt by Imperial College with a new transmission system but was damaged beyond repair in November 1965.
The Hatfield Puffin first flew in 16 November 1961, one week after SUMPAC. The Hatfield Man Powered Aircraft Club was formed of employees of de Havilland Aircraft Company and had access to company support. Eventually its best distance was 908 metres. John Wimpenny landed in a state of physical exhaustion. His record stood for 10 years.
Puffin 2 was a new fuselage and wing around the transmission recovered from the original Puffin. It flew on 27 August 1965 and made several flights over a half-mile, including a climb to 5.2 metres. In 1967 Kremer increased his prize money tenfold to £500,000, for no-one had even attempted his challenging course. He also opened the competition to all nationalities as it had previously been restricted to British entries only. After Puffin 2 was damaged it was handed over to Liverpool University who used it to build the Liverpuffin
After this date several less successful aircraft flew, until 1972 when the Jupiter flew 1,070 metres and 1,239 metres in June 1972.
On 23 August 1977 the Gossamer Condor 2 flew the first figure-eight, a distance of 2,172 metres winning the first Kremer prize. It was built by Dr Paul B. MacCready. and piloted by amateur cyclist and hang-glider pilot Bryan Allen.
(It should be pointed out that the pilots of human powered aircraft have to be outstanding physical specimens, usually bicycle racers.)