Performance data from a wind-tunnel test of two main-rotor blade designs for a utility-class helicopter

Original publisher: [Washington, DC] : National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ; [Springfield, Va. : For sale by the National Technical Information Service], 1990. OCLC Number: (OCoLC)24925233 Subject: Rotors (Helicopters) -- Aerodynamics -- Statistics. Excerpt: ... Table7. RotorPerformancDeataforBaselineStiffBladeSetWith I b = 0.4383 slug-ft 2 ( a ) p = 0.0023 slug / ft 3 ( atmospheric air ); _ [ T = 0.285; " 7 = 4.58 12 HOVER RUN POINT AI B I 0 CT CQ. 00012 1 2.0. 00057 220. 1. 00014 1 4.0. 00150 221. 1. 00019 1 6.0. 00248. 1 222. 00027 1 8.0. 00374 223. 2. 00038 1 9.9. 0O5O9. 2 224. 00052 1 12.0. 00663. 2 225. 00091 1 16.0. 00966. 3 227. 00115 1 18.0. 01110 228. 2. 00128. 1 18.9. 01193. 2 229. 00143. 1 19.9. 01252 230. 2. 00162. 1 21.0. 01306 231. 2. 00116. 2 17.9. 01118 232. 3. 00072. 2 14.0. 00813 234. 3. 00040. 2 10.0. 00520. 4 235. 00020. 3 6.0. 00260 236. 3 ( b ) p = 0.00382 slug / ft3; MT = 0.65; 7 = 7.61 46 HOVER RUN POINT AI B1 0 CT CQ. 00015-. 1 2.0. 00142-. 3 1292. 00019. 1 4.0. 00234 1293-. 4. 00026. 1 6. O. OO357-. 5 1294. 00036. 2 7.9. 00483-, 5 1295. 00049. 3 9.9. OO620-. 6 1296. 00066. 1 12.0. 00761-. 6 1297. 00085. 3 13.9. 00912 1298-, 8. 00111. 0 15.9. 01059-. 7 1299. 0O087. 3 14.0. 00923-. 6 1300. 0O067. 4 11.9. 00779-. 5 1301. O0051-. 6-. 1 10.0. 00635 1302. 00038. 0 7.9. 00493-. 6 1303. 00027. 4 5.9. 00372 1304-. 5 11