XV-15 litho - NASA's History Office

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18 management continued to show interest in pursuing the development of tilt rotor technology. In 1966, to ensure they could legally proceed with the work, Bell paid Haviland Platt for the rights to the convertible (tilt rotor) aircraft described in his patent.
NASA-Army Cooperation During the late 1960s, the U.S. Army established the Army Aeronautical Research Laboratory (AARL) at the NASA Ames Research Center. In 1969, a “Master Agreement” between the National Aeronautics and Space Administration and the U.S. Army Materiel Command was authorized which provided for the joint (Army/NASA) participation in the development of advanced aircraft technology. The cooperative effort conducted under this agreement would be performed by NASA and Army personnel assigned to the Joint Aeronautical Research Group (JARG). The NASA Ames Aeronautics and Flight Mechanics Directorate and the Army Aeronautical Research Laboratory, later designated the Army Air Mobility Research and Development Laboratory (AMRDL), began a cooperative activity to address an array of tilt rotor aircraft aeromechanics issues and deficiencies that had surfaced during the flight and wind tunnel tests of the <strong>XV</strong>-3. The initial staff members of this joint tilt rotor focused effort were James (Jim) Weiberg 9 (NASA) and Martin D. (Marty) Maisel 10 and Gary B. Churchill 11 of the AMRDL. During the early phases of this cooperative effort, the Air Force joined the Army and NASA in funding some of the research activities. The focused tilt rotor technology investigations included in-house Government research, contracted work, and combined Government/ industry efforts. In addition, tilt rotor related work was conducted within the rotorcraft industry under both company funded and Independent Research and Development (IR&D) efforts. The following review will focus on the NASA Ames/Army funded activities. 9 At the beginning of the tilt rotor activity, Weiberg had accrued nearly 30 years as an aerodynamics, wind tunnel, and flight-test engineer at the Ames Research Center. 10 Maisel had worked on the design and test of tilt wing propellers and tilt rotor proprotors at Boeing Vertol before joining the AMRDL in 1970. 11 Churchill came to the AMRDL in 1971 from Boeing Vertol with an extensive background in V/STOL flight control system development. Prior to working at Vertol, he participated in the development of the LTV XC-142 tilt wing aircraft. 19
Page 1: The History of The XV-15 Tilt Rotor
Page 5: Contents Prologue . . . . . . . . .
Page 9: Dedication The story of the success
Page 13: Foreword The development of tilt ro
Page 17 and 18: List of Figures Figure 1 Leonardo d
Page 19 and 20: Figure 41 Simultaneous static test
Page 21 and 22: Figure A-2 Transcendental Model 2 t
Page 23 and 24: List of Acronyms AARL Army Aeronaut
Page 25: TRENDS Tilt Rotor Engineering Datab
Page 28 and 29: Figure 2. Illustration of vertical
Page 30 and 31: Figure 4. McDonnell XV-1 compound h
Page 32 and 33: Figure 7. Henry Berliner tiltpropel
Page 34 and 35: Top: Figure 9. The Baynes Heliplane
Page 36 and 37: Figure 13. Illustration from the Ha
Page 38 and 39: Figure 17. Bob Lichten, extreme lef
Page 40 and 41: Figure 20. Tiedown tests of the XV-
Page 42 and 43: 16 Research and Engineering), obtai
Page 46 and 47: 20 Building the Technology Base Aer
Page 48 and 49: Figure 25. Bell 25-ft. diameter pro
Page 50 and 51: Figure 28. Performance tests of 5-f
Page 52 and 53: Figure 31. Bell 25-ft. diameter pro
Page 54 and 55: 28 Tilt Rotor Research Aircraft Pro
Page 56 and 57: 30 During the late 1960s and early
Page 58 and 59: 32 range of loading conditions and
Page 60 and 61: 34 The initial projected cost of $4
Page 62 and 63: Figure 35. Illustration of the Boei
Page 64 and 65: Figure 36. 1/5 scale XV-15 model in
Page 66 and 67: 40 under the contract. To accomplis
Page 68 and 69: 42 Aircraft Development The primary
Page 70 and 71: 44 Test stand angle box Test stand
Page 72 and 73: Figure 40. Proprotor response to co
Page 74 and 75: Figure 41. Simultaneous static test
Page 76 and 77: 50 helicopters. For the conversion
Page 78 and 79: 52 Prior to the start of flight ope
Page 80 and 81: Figure 44. Initial Bell tiedown sho
Page 82 and 83: 56 degrees 25 and a brief assessmen
Page 84 and 85: Figure 45. XV-15 in the Ames Resear
Page 86 and 87: 60 NAVAIR managers as a means of de
Page 88 and 89: Figure 46. Government and Bell pers
Page 90 and 91: Figure 49. Tiedown test facility at
Page 92 and 93: 66 Wheel height Top: Figure 51. Met
Page 94 and 95:
68 Symmetric beam mode Antisymmetri
Page 96 and 97:
Figure 55. XV-15 during short takeo
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Top: Figure 56. Flow visualization
Page 100 and 101:
74 during “degraded” flight con
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Figure 59. Hover acoustics tests du
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78 Nose weight Top: Figure 61. Typi
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80 Following the completion of cont
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82 After the proprotors stopped, th
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84 sudden stoppage of the right eng
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86 A reconversion to the helicopter
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88 Paris Air Show By early 1981, th
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90 enroute from Farnborough to Fran
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Top: Figure 66. Senator Goldwater i
Page 120 and 121:
Figure 69. Shipboard evaluations of
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Figure 71. XV-15 at the New York Po
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98 Crash (October 16 and 17, 1991).
Page 126 and 127:
100 The End of an Era By the mid 19
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Top: Figure 73. XV-15 at the Dallas
Page 130 and 131:
104 management system was very effe
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106 could make use of the same flig
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Figure 76. The Bell tilt rotor eagl
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110 demonstrations two years earlie
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112 Future Tilt Rotor Aircraft By t
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114 tiltrotor aircraft program. Thi
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116 Model 1-G Characteristics Power
Page 144 and 145:
Figure A-3. Transcendental Model 2
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Figure A-4. XV-3 three-view drawing
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Figure A-5. XV-3 inboard drawing, s
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Nacelle angle (degrees) 124 120 90
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Figure A-8. General layout and majo
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Figure A-9. Side view inboard profi
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Figure A-11. XV-15 height-velocity
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132 Weight Design . . . . . . . . .
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134 WBS LEVEL: Bell Army/NASA I II
Page 162 and 163:
136 US Army Air Mobility Research a
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138 Army/NASA (continued) Staff (19
Page 166 and 167:
140 Appendix C—Chronology 1452-15
Page 168 and 169:
142 1968 Boeing Vertol awarded cont
Page 170 and 171:
144 November, Initial piloted simul
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146 24 March 1982 XV-15 demonstrate
Page 174 and 175:
148 30 July 1987 FAA/NASA/DOD Tilt
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150 21 August 1990 V-22 reached 340
Page 178 and 179:
152 14 June 1993 The Department of
Page 180 and 181:
154 Appendix D—Awards and Records
Page 182 and 183:
Figure D-1. Jean Tinsley, first wom
Page 184 and 185:
Figure E-3. XV-15 flying by the Sta
Page 186 and 187:
Figure E-7. Bell test pilots Roy Ho
Page 188 and 189:
Figure E-11. Ken Wernicke, Bell til
Page 190 and 191:
164 Appendix F—Bibliography Tilt
Page 192 and 193:
166 Ball, J. C. “XV-15 Shipboard
Page 194 and 195:
168 Churchill, G. B.; Dugan, D. C.
Page 196 and 197:
170 Edenborough, H. K. “Investiga
Page 198 and 199:
172 Harendra, P. B.; Joglekar, M. J
Page 200 and 201:
174 Kvaternik, Raymond G. “Studie
Page 202 and 203:
176 Magee, J. P.; Pruyn, R. “Pred
Page 204 and 205:
178 Martin, Stanley, Jr.; Erb, Lee
Page 206 and 207:
180 Rutledge, Charles K.; George, A
Page 208 and 209:
182 Tischler, M. B.; Leung, J. G. M
Page 210 and 211:
184 Whitaker, H. L.; Cheng, Yi. “
Page 212 and 213:
186 Daniel C. Dugan Daniel Dugan gr
Page 214 and 215:
188 Carnet, 88 Carpenter, Ron, 91 C
Page 216 and 217:
190 Moffett Airfield, Moffett Field
Page 219 and 220:
Monographs in Aerospace History Lau
Page 222:
National Aeronautics and Space Admi
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XV-15 litho - NASA's History Office

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