Item 1278
DESIGN: UniCopter ~
Pusher Prop - Type - Shrouded Propeller
Notes:
This approach is better than the Ducted Fan but it is limited by its maximum radius, which is limited by the distance between the center of thrust and the rotor blades.
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930084866_1993084866.pdf Have hard copy.
http://naca.central.cranfield.ac.uk/report.php?NID=3657
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930082682_1993082682.pdf
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NASA;
The following NACA search on "Shrouded propeller" gave 9 records.http://ntrs.nasa.gov/search.jsp?N=0&Ntk=all&Ntx=mode%20matchall&Ntt=%22Shrouded%2BPropeller%22
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Last Revised: November 26, 2008