here's a photo of the R-4 helicopter he flew --- its nickname was Hoverfly so this came for a search for that term  --   would this do?
http://www.military-aircraft.org.uk/helicopters/sikorsky-R-4B-hoverfly-helicopter.htm
 
it is available for non commercial use
 
and
this site tells more about it
https://www.fiddlersgreen.net/models/aircraft/Sikorsky-R4.html
including a paper model which can be made
 
Barbara Hass, retired librarian
 
 
In a message dated 6/23/2010 2:39:34 P.M. Mountain Daylight Time, [log in to unmask] writes:
Frank Erickson
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