Editing Project 621

{{refimprove|date=August 2016}}'''Project 621''' was a project by the [[Claudius Dornier|Dornier]] company with the intention of producing a [[sounding rocket]] with liquid-fuel propulsion. It was to use a [[Paragliding|paraglider]] system to return safely to earth for later re-use. It had a wet mass of 240 kg (520 lb) and a dry mass of 74 kg. The [[rocket]] itself was never launched.

The rocket of the project was supposed to reach an [[apogee]] of eighty kilometers, and then return from a height of forty kilometers, spiraling to the ground. In 1965, multiple drop tests of the paraglider system on the rocket test area in [[Salto di Quirra]] in [[Sardinia]] was performed.

The project was halted in 1966, after large problems occurred regarding the choice of a suitable wing material (textile wings could not handle the loads, while wings made of high-grade steel could not withstand the airflow without major problems).

==References==
* [https://web.archive.org/web/20080907145150/http://astronautix.com/lvs/proct621.htm astronautix.com]

{{Portal|Spaceflight}}
[[Category:Sounding rockets of Germany]]


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