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The esteemed Crank o' the Day for 2025 Nov 23:
Associazione Sviluppo Propulsione Spaziale
1999 May 27
... technology
. propulsion
...
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"... has built an operative system called SC23 that permits to verify experimentally, under due conditions, the PNN theory and therefore exploit the delay between action and reaction forces; this system can be enhanced with an operative power device which promises many useful applications."
In English and Italian.
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