Talk:Bell XV-3

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Aviation: Aircraft / Rotorcraft

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When

When did the XV-3 have the wind tunnel accident and when did work on the project actually end? --Born2flie 07:05, 22 October 2007 (UTC)[reply]

Per Stephen Harding's book on US Army Aircraft, the first prototype was damaged beyond economical repair (cause unstated) in 1956. Joint US Army/AF testing on second prototype ended in 1962, after which the XV-3 was tranferred to NASA. That's all I have tonight, but I'll keep looking. - BillCJ 07:54, 22 October 2007 (UTC)[reply]

Timeline

1951

Convertible Aircraft Program RFP released. (NASA, p. 12.)

1953

October 1953, award of development contract for two airframes (NASA, p. 12)

1955

11 August 1955, first hover flight by Floyd Carlson (NASA, p. 12.)
18 August 1955, hard landing caused by rotor instability resulting in minor airframe damage (NASA, p. 12.)

1956

29 March 1956, flight testing resumes (NASA, p. 13.)
25 July 1956, instability is experienced again. Flight testing resumed in late September (NASA, p. 13.)
25 October 1956, aircraft (4147) crashed when pilot blacked out due to extremely high cockpit vibrations. Vibrations resulted when pilot moved rotor shafts 17 degrees forward from vertical. Pilot, Dick Stansbury, seriously injured (NASA, p. 13.)

1957

18 July 1957, testing of ship 2 (4148) began in NACA Ames Aeronautical Laboratory wind tunnel. Ship 2 modified with two-bladed rotors. (NASA, pp. 13-14.)

1958

21 January 1958, ship 2 began flight testing at Bell facility. (Markman and Holder 2000)
1 April 1958, 30 degree forward transition, full-down autorotation, speed of 205 kilometres per hour (127 mph) achieved. (Markman and Holder 2000)
6 May 1958, XV-3 grounded for rotor oscillation experienced at 40-degrees forward pylon angle. (Markman and Holder 2000)
September-October 1958, wind tunnel testing at Ames (Markman and Holder 2000)
18 December 1958, ship 2 completed first dynamically stable full conversion to airplane mode with test pilot Bill Quinlan (NASA, p. 14.)

1959

6 February 1959, USAF Captain Robert G. Ferry first military pilot to execute full conversion of XV-3. (NASA 2000, p. 141.)
24 April 1959, flight testing at Bell is concluded (Markman and Holder 2000)
1 May 1959, XV-3 shipped to Edwards Air Force Base for Phase II Flight Test Program. Flight testing begins 15 May 1959. (NASA 2000, p. 141.)
14 May 1959, Army-Air Force flight testing begins at Edwards AFB. (Markman and Holder 2000)
July 1959, Major Robert Ferry writes report based on his flight evaluations. Test flights identified deficiencies in performance, but validated the "fixed-wing tilt-prop" or tiltrotor as a practical application for rotorcraft. (NASA, p. 14.)
12 August 1959, First hovering, altitude, and full conversion flight of XV-3 by a NASA test pilot Fred Drinkwater. (NASA 2000, p. 141.)

1961

8 August 1961, U.S. Army test pilot Major E. E. Kluever conducts first flight evaluation of the XV-3 by an Army pilot.

1962

June/July 1962, XV-3 (tail number 4148) with new rotor system tested in ARC 40- by 80-foot wind tunnel.

1966

April 1966, Analysis explaining the tilt rotor aircraft rotor/pylon/wing aeroelastic instability issued by Dr. Earl Hall of Bell.
20 May 1966, XV-3 damaged at Ames wind tunnel. (Markman and Holder 2000)
14 June 1966 NASA Ames Research Center announces completion of XV-3 testing. Total of 250 flights accomplished, 125 flight hours, 110 full conversions. (NASA 2000, p. 141.)

1984

10-13 September 1984, XV-15 flown over the nap-of-the-earth course at Fort Rucker, Alabama. (NASA 2000, p. 147) XV-15 team discover XV-3 at museum. (NASA 2000, p. 17.)

*NASA reference is the monograph from NASA written by Maisel et al, listed in the References section of the article.

Stats template

I have tried to add some missing statistics, but the template doesn't seem to want to recognize some like chord, or the fact that the XV-3 had two sets of rotors of different diameters. Can someone more familiar with templates take a look? I have left the data in place, even though it doesn't show in the current article. Mark Sublette (talk) 19:22, 16 April 2009 (UTC)Mark SubletteMark Sublette (talk) 19:22, 16 April 2009 (UTC)[reply]

There isn't a way to include the additional information in the template the way you had formatted it. Where it was able to be included, I have edited the information. I used the three-bladed rotor information even though the aircraft is restored to the two-bladed model, because it was the three-bladed model that created the envelope and successfully made the transitions. --Born2flie (talk) 15:40, 29 August 2009 (UTC)[reply]

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