The invention is an annular ducted lift fan system for a VTOL type aircraft. In detail, the invention comprises an annular duct, a lift fan set, engines, a central fuselage, a peripheral wing, and means for pneumatic coupling or mechanic coupling of engines and the lift fan set. The lift fan set is mounted in the annular duct and powered by the engines through pneumatic coupling or mechanic coupling. The annular duct is opened with the lift fan set working to provide high lift efficiency in VTOL mode and transition mode and is closed off to reduce drag in cruise mode.
Annular ducted lift fan VTOL aircraft
2016-04-14
Patent
Electronic Resource
English
IPC: | B64C AEROPLANES , Flugzeuge |
Ducted Propulsion Units for VTOL Aircraft
NTIS | 1968
|Engineering Index Backfile | 1959