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XV-3 HOVERING ON RAMP.  Flight Test of Bell XV-3 Convertiplane.  Bell VTOL tilt-rotor aircraft hovering along side Hangar One at Moffett Field. The XV-3 design combined a helicopter rotor and a wing. A 450 horsepower Pratt & Whitney piston engine drove the two rotors. The XV-3, first flown in 1955 , was the first tilt-rotor to achieve 100% tilting of rotors. The vehicle was underpowered, however, and could not hover out of ground effect. Note the large ventral fin, which was added to imrpove directional stability in cruse (Oct 1962) ARC-1959-A-25685-14

XV-3 HOVERING ON RAMP. Flight Test of Bell XV-3 Convertiplane. Bell ...

XV-3 HOVERING ON RAMP. Flight Test of Bell XV-3 Convertiplane. Bell VTOL tilt-rotor aircraft hovering along side Hangar One at Moffett Field. The XV-3 design combined a helicopter rotor and a wing. A 450 hors... More

XV-3 HOVERING ON RAMP.  Flight Test of Bell XV-3 Convertiplane.  Bell VTOL tilt-rotor aircraft hovering in front of building N-211 at Moffett Field. The XV-3 design combined a helicopter rotor and a wing. A 450 horsepower Pratt & Whitney piston engine drove the two rotors. The XV-3, first flown in 1955 , was the first tilt-rotor to achieve 100% tilting of rotors. The vehicle was underpowered, however, and could not hover out of ground effect. Note the large ventral fin, which was added to imrpove directional stability in cruse (Oct 1962) ARC-1959-AC-25685

XV-3 HOVERING ON RAMP. Flight Test of Bell XV-3 Convertiplane. Bell ...

XV-3 HOVERING ON RAMP. Flight Test of Bell XV-3 Convertiplane. Bell VTOL tilt-rotor aircraft hovering in front of building N-211 at Moffett Field. The XV-3 design combined a helicopter rotor and a wing. A 450... More

BELL XV-3 (AF54-148) Convertiplane (experimental tilt rotor) IN FLIGHT Note:  Used in publication in Flight Research at Ames;  57 Years of Development and Validation of Aeronautical Technology NASA SP-1998-3300 fig. 121 ARC-1960-AC-26438

BELL XV-3 (AF54-148) Convertiplane (experimental tilt rotor) IN FLIGHT...

BELL XV-3 (AF54-148) Convertiplane (experimental tilt rotor) IN FLIGHT Note: Used in publication in Flight Research at Ames; 57 Years of Development and Validation of Aeronautical Technology NASA SP-1998-3300 fig. 121

XV-3 airplane helicopter hovering  VTOLin front of the NASA Ames Research Center, Moffett Field, CA hangar N-211 ARC-1961-A-27737

XV-3 airplane helicopter hovering VTOLin front of the NASA Ames Resea...

XV-3 airplane helicopter hovering VTOLin front of the NASA Ames Research Center, Moffett Field, CA hangar N-211

XV-3 airplane helicopter hovering  VTOLin front of the NASA Ames Research Center, Moffett Field, CA hangar N-211 ARC-1961-A-27738

XV-3 airplane helicopter hovering VTOLin front of the NASA Ames Resea...

XV-3 airplane helicopter hovering VTOLin front of the NASA Ames Research Center, Moffett Field, CA hangar N-211

XV-3 in Ames Reseach Center 40x80ft wind tunnel; Rotor dynamic stability tests ARC-1966-A-37006-12

XV-3 in Ames Reseach Center 40x80ft wind tunnel; Rotor dynamic stabili...

XV-3 in Ames Reseach Center 40x80ft wind tunnel; Rotor dynamic stability tests

Bell XV-3 Convertiplane in Ames Reseach Center 40x80ft subsonic wind tunnel; Rotor dynamic stability tests ARC-1966-A-37006-5

Bell XV-3 Convertiplane in Ames Reseach Center 40x80ft subsonic wind t...

Bell XV-3 Convertiplane in Ames Reseach Center 40x80ft subsonic wind tunnel; Rotor dynamic stability tests

XV-3 in Ames Reseach Center 40x80ft wind tunnel; Rotor dynamic stability tests ARC-1966-A-37006-6

XV-3 in Ames Reseach Center 40x80ft wind tunnel; Rotor dynamic stabili...

XV-3 in Ames Reseach Center 40x80ft wind tunnel; Rotor dynamic stability tests

XV-3 from rear in Ames Reseach Center 40x80ft wind tunnel with K Edenborough and B. Ramsey ARC-1966-A-37019

XV-3 from rear in Ames Reseach Center 40x80ft wind tunnel with K Edenb...

XV-3 from rear in Ames Reseach Center 40x80ft wind tunnel with K Edenborough and B. Ramsey

XV-3 in Ames Reseach Center 40x80ft wind tunnel with K. Edenborough and B. Ramsey, engineers Published in The History of the XV-15 Tilt Rotor Research Aircraft (from Concept to Flight NASA SP-2000-4517) ARC-1966-A-37017

XV-3 in Ames Reseach Center 40x80ft wind tunnel with K. Edenborough an...

XV-3 in Ames Reseach Center 40x80ft wind tunnel with K. Edenborough and B. Ramsey, engineers Published in The History of the XV-15 Tilt Rotor Research Aircraft (from Concept to Flight NASA SP-2000-4517)