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Rubik R-11b Cimbora

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As well as providing aerotowing training, the Cimbora was used to train pilots in ridge-flying techniques, a style which encouraged duration record attempts. The longest in Hungary lasted 25 hr 7 min, flown by Géza Vass and Endre Lacza in August 1948. R-11bs remained in use into the 1950s. A 1984
187:, joined at their tops and braced outboard by a pair of steel struts on each side from the lower fuselage longerons to the wing spars. On the R-11a Gólya, these were V-struts but the R-11b had instead a near-parallel pair, splaying outwards a little from top to bottom. 138:
responded with the F-11 Gólya (Stork) built, like several of his designs, by Aero Ever Kft. Its first flight was on 9 May 1940. A combination of flight test results and tightening regulations lead to three more prototypes, the R-11a, R-11b and
206:(cg) with its own windscreen, accessed via an upwardly hinged upper fuselage section. On the underside a landing skid ran from the nose to below the front of the instructor's cockpit. Aft of it, but ahead of the cg. there was a semi-exposed 134:
In 1939 there was a call from the Aeroclub of the fhe Technical University for a two-seat glider on which intermediate level pilots could learn the skills required for aerotowing.
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occupied more than half the span. The wings were supported centrally over the fuselage by a longitudinal pair of inward-leaning steel N-struts from the upper fuselage
122:, first flown in 1940 and intended to introduce B-certificated pilots to aero-towing techniques. It proved popular and was also used to train pilots in 459: 631: 422: 636: 469: 135: 78: 143:. Details of the differences between them are sparse but it was the R-11b, renamed the Cimbora that went into production in 1941. 646: 202:
with a removable cover incorporating a windscreen and the instructor sat under the rear wing in an open cockpit over the
452: 290: 641: 510: 505: 500: 445: 25: 219: 600: 595: 540: 590: 580: 535: 525: 495: 490: 575: 560: 195: 176: 172: 119: 610: 570: 555: 240: 418: 203: 605: 585: 550: 520: 515: 545: 223: 151: 625: 199: 437: 565: 392: 164: 123: 485: 211: 210:. The fuselage tapered rearwards to the tail, where the R-11's strut-braced 207: 160: 63: 37: 184: 180: 480: 299: 191: 115: 52: 222:
together were tapered in plan out to rounded tips. The full, rounded,
67: 243:, remained active at least to 2016 but is currently deregistered. 168: 150: 214:
was placed on top of the fuselage just ahead of a small, tapered
441: 371:(in Hungarian). Budapest: Müszaki Könuvkiadó. pp. 99–104. 332: 215: 194:
fuselage was flat-sided, built around longerons and
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Aviation Museums and Collections of Mainland Europe
226:reached down to the keel, behind a small tailskid. 171:-braced wing. The half-wings were built around two 126:flying and set several national duration records. 66:(50) and the Aircraft Factory of Transylvania in 453: 417:. Air Britain (Historians) Ltd. p. 295. 107: 8: 393:"R-11b Cimbora, Hungarian gliders 1933-2000" 198:. The student's cockpit was under the wing 460: 446: 438: 386: 384: 382: 380: 378: 362: 360: 331:100 km/h (62 mph, 54 kn) 356: 346:1.1 m/s (220 ft/min) minimum 155:R-11b Cimbora in 2015, winch-launching 15: 190:Apart from rounded upper decking the 7: 175:. Swept at 7.5°, they had constant 274:7.52 m (24 ft 8 in) 14: 286:21.5 m (231 sq ft) 280:15 m (49 ft 3 in) 24: 1: 179:out to rounded tips. Slotted 159:The R-11 was a glider with a 632:Aircraft first flown in 1940 369:Magyar vitorlázó repülögépek 268:Two, student and instructor 663: 637:1940s Hungarian sailplanes 476: 316:400 kg (882 lb) 310:220 kg (485 lb) 108: 23: 18: 259:General characteristics 156: 647:Parasol-wing aircraft 468:Aircraft designed by 367:Gabor, Jareb (1988). 154: 106:Rubik R-11b Cimbora ( 338:Maximum glide ratio: 218:. The tailplane and 413:Ogden, Bob (2009). 230:Operational history 157: 619: 618: 424:978 0 85130 418 2 204:centre of gravity 102: 101: 36:Advanced trainer 654: 462: 455: 448: 439: 429: 428: 410: 404: 403: 401: 399: 388: 373: 372: 364: 324: 304:Göttingen Gö 549 261: 111: 110: 95: 49: 41:Type of aircraft 28: 16: 662: 661: 657: 656: 655: 653: 652: 651: 622: 621: 620: 615: 472: 466: 435: 433: 432: 425: 412: 411: 407: 397: 395: 390: 389: 376: 366: 365: 358: 353: 320: 257: 249: 241:Budaörs Airport 232: 224:balanced rudder 149: 142: 132: 93: 62:Aero Ever Kft. 48:National origin 47: 42: 12: 11: 5: 660: 658: 650: 649: 644: 642:Rubik aircraft 639: 634: 624: 623: 617: 616: 614: 613: 608: 603: 598: 593: 588: 583: 578: 573: 568: 563: 558: 553: 548: 543: 538: 533: 528: 523: 518: 513: 508: 503: 498: 493: 488: 483: 477: 474: 473: 467: 465: 464: 457: 450: 442: 431: 430: 423: 405: 374: 355: 354: 352: 349: 348: 347: 341: 335: 329:Maximum speed: 318: 317: 311: 305: 296: 287: 281: 275: 269: 248: 247:Specifications 245: 231: 228: 148: 145: 140: 131: 128: 100: 99: 96: 90: 89: 86: 82: 81: 76: 72: 71: 60: 56: 55: 50: 44: 43: 40: 34: 30: 29: 21: 20: 19:R-11b Cimbora 13: 10: 9: 6: 4: 3: 2: 659: 648: 645: 643: 640: 638: 635: 633: 630: 629: 627: 612: 609: 607: 604: 602: 599: 597: 594: 592: 589: 587: 584: 582: 579: 577: 574: 572: 569: 567: 564: 562: 559: 557: 554: 552: 549: 547: 544: 542: 539: 537: 534: 532: 529: 527: 524: 522: 519: 517: 514: 512: 509: 507: 504: 502: 499: 497: 494: 492: 489: 487: 484: 482: 479: 478: 475: 471: 463: 458: 456: 451: 449: 444: 443: 440: 436: 426: 420: 416: 409: 406: 394: 391:Fekes Gabor. 387: 385: 383: 381: 379: 375: 370: 363: 361: 357: 350: 345: 344:Rate of sink: 342: 339: 336: 334: 330: 327: 326: 325: 323: 315: 314:Gross weight: 312: 309: 308:Empty weight: 306: 303: 301: 297: 294: 292: 288: 285: 282: 279: 276: 273: 270: 267: 264: 263: 262: 260: 255: 253: 246: 244: 242: 238: 229: 227: 225: 221: 217: 213: 209: 205: 201: 197: 193: 188: 186: 182: 178: 174: 170: 166: 162: 153: 146: 144: 137: 129: 127: 125: 121: 117: 113: 97: 92: 91: 87: 85:First flight 84: 83: 80: 77: 74: 73: 69: 65: 61: 59:Manufacturer 58: 57: 54: 51: 46: 45: 39: 35: 32: 31: 27: 22: 17: 530: 434: 414: 408: 396:. Retrieved 368: 343: 337: 328: 321: 319: 313: 307: 298: 291:Aspect ratio 289: 283: 277: 271: 265: 258: 256: 251: 250: 236: 233: 200:leading edge 189: 158: 133: 105: 103: 94:Number built 398:25 February 322:Performance 239:, based at 192:ply-covered 130:Development 88:9 May 1940 626:Categories 470:Ernő Rubik 351:References 284:Wing area: 136:Ernő Rubik 124:ridge lift 79:Ernő Rubik 278:Wingspan: 252:Data from 235:replica, 220:elevators 212:tailplane 208:monowheel 185:longerons 118:two seat 116:Hungarian 75:Designer 64:Esztergom 38:sailplane 254:Gabor, F 181:ailerons 300:Airfoil 272:Length: 237:HA-5035 53:Hungary 421:  196:frames 147:Design 120:glider 114:was a 70:(12). 68:Oradea 591:R-25 266:Crew: 177:chord 173:spars 169:strut 165:swept 98:c.62 33:Role 611:R-32 606:R-31 601:R-27 596:R-26 586:R-24 581:R-23 576:R-22 571:R-21 566:R-20 561:R-18 556:R-17 551:R-16 546:R-15 541:R-14 536:R-12 531:R-11 526:R-10 521:R-09 516:R-08 511:R-07 506:R-06 501:R-05 496:R-04 491:R-03 486:R-02 481:R-01 419:ISBN 400:2019 295:10.5 161:high 139:R11b 104:The 333:VNE 216:fin 109:Pal 628:: 377:^ 359:^ 340:14 167:, 163:, 461:e 454:t 447:v 427:. 402:. 302:: 293:: 141:1 112:)

Index


sailplane
Hungary
Esztergom
Oradea
Ernő Rubik
Hungarian
glider
ridge lift
Ernő Rubik

high
swept
strut
spars
chord
ailerons
longerons
ply-covered
frames
leading edge
centre of gravity
monowheel
tailplane
fin
elevators
balanced rudder
Budaörs Airport
Aspect ratio
Airfoil

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