Project 621 (rocket)
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Project 621 was a project by the Dornia company with the intention to produce a sounding rocket with liquid-fuel propulsion. It was to use a paraglider system to return safely to earth for later re-use. The paraglider system was tested in 1965, but the rocket itself was never launched.
The rocket of the project was supposed to reach a ceiling of 80 km, and then return from a height of 40 km, spiraling to the ground. In 1965, a release test on the rocket test-area in Salto di Quirra was performed.
The project was stopped in 1969, after large problems occurred regarding the choice of a suitable wing material (textile wings had not been up to the loads, while wings made of high-grade steel could not stand the airflows without major problems).
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