Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane and fluid sustained
Patent
1996-03-20
1998-05-05
Mojica, Virna Lissi
Aeronautics and astronautics
Aircraft, heavier-than-air
Airplane and fluid sustained
244 122, 244 124, 244 125, 244 126, 244 1723, 244 23B, 244 23C, B64C 2708, B64C 2902
Patent
active
057463905
ABSTRACT:
A ducted fan 20 provides lift to a flying vehicle 10. The ducted fan includes direction control vanes (1, 2, 3, 4) for controlling torques applied to the vehicle, and also includes lift negation vanes (305, 306, 307, 308), which control the available lift. The lift negation vanes are oriented with their longitudinal axes parallel to the forward-aft axis (9) of the vehicle in order to reduce drag at high forward velocities. The thrust negation vanes include fixed (305) and movable (305M) portions, with the movable portions rotatable so as to extend into the duct airflow to cause turbulence. The direction control vanes are airfoils arranged for rotation about their quarter-chord axes (410), which reduces the amount of torque required for rotation of the direction-control vanes. This, in turn, allows stepper motors (924a) to be used to drive the vanes. The effects of forward velocity on the ducted fan also creates effects which tend to pitch the vehicle nose-down. A pair of conventional-type horizontally disposed airfoils (44a, 44b) is rotatable for pitch control, and a control system (700) senses airspeed, and provides a compensating rotation of the airfoils.
REFERENCES:
patent: 2968453 (1961-01-01), Bright
patent: 3276528 (1966-10-01), Tucknott et al.
patent: 3405890 (1968-10-01), Eickmann
patent: 4071207 (1978-01-01), Piasecki et al.
patent: 4173321 (1979-11-01), Eichmann
patent: 4828203 (1989-05-01), Clifton et al.
patent: 5035377 (1991-07-01), Buchelt
patent: 5115996 (1992-05-01), Moller
patent: 5150857 (1992-09-01), Moffitt et al.
patent: 5454531 (1995-10-01), Melkuti
patent: 5505407 (1996-04-01), Chiappetta
Fran Rich Chi Associates, Inc.
Meise William H.
Mojica Virna Lissi
LandOfFree
Air-land vehicle with ducted fan vanes providing improved perfor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Air-land vehicle with ducted fan vanes providing improved perfor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air-land vehicle with ducted fan vanes providing improved perfor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-47042