asteroza + puffin   5

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20110011311.pdf
The original Puffin electric VTOL tailsitter personal general aviation vehicle paper from NASA.
NASA  PUFFIN  electric  VTOL  tailsitter  personal  helicopter  vehicle  transportation  research  technology  aircraft  aviation  general  Delicious 
february 2017 by asteroza

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