Accession Number : AD0164082

Title :   Ducted Propulsion Units for VTOL Aircraft.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Johnson,Arthur E.

Report Date : 06 JAN 1970

Pagination or Media Count : 6

Abstract : The patent relates to a propulsion system for the vertical take-off and landing (VTOL) aircraft having tiltable tandem mounted ducted propeller propulsion units. The propulsion units are connectable together to form a closed fluid path when the ducts are positioned for horizontal forward flight and thereby present a one propeller disc area. When the ducts are tilted for vertical flight, the individual propulsion units become disconnected, thereby presenting double the thrust area desirable for vertical flight.

Descriptors :   (*Shrouded propellers, *Patents), (*Vertical take-off planes, Jet propulsion), Ducts, Shroud rings, Alignment, Airfoils

Subject Categories : Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE