KRONFELD ON GLIDING AND SOARING.pdf - Lakes Gliding Club

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GLIDING AND SOARING PLANES 283
284 KRONFELD ON GLIDING & SOARING Every sailplane factory has developed a family of its own types. Among the German ones let me quote those of, undoubtedly, the largest sailplane and glider factory in the world. This is the former " Kegel Flugzeugbau " in Kassel which has now been taken over by Fieseler, the German stunt pilot. The most important point regarding the products of this firm are the low prices, which have been made possible by the splendid organization of the works. Besides machines similar to the " Zogling " and " Priifling," and the two-seater " Hercules " which I have already described ; two types deserve special mention, namely :— the " Kassel 20 " and the " Kassel 25." The only difference between the two machines is the wing, which is mounted on the same fuselage with the same controls. The " Kassel 20 " has a span of 46 ft. 2 in. and a length of 21 ft. i in. ; a maximum chord of 3 ft. 9 in. and a wing area of 165.75 S(l- ft- The weight, empty, is 225 Ib. This machine can be called a further development of the " Priifling, " with differential control provided for the ailerons. The " Kassel 25 " only differs as regards the span, which is 59 ft., the wing, however, possesses the same chord as the " Kassel 20 " making the wing area 166.75 S(l- ft- The weight empty is 230 Ib., and this is surprisingly low. During the Rhon competitions of 1931 this machine showed good flying qualities which might be accounted for, to a large extent, by the differential control of the ailerons. It is, at all events, an outstanding example of a high-class, and at the same time not too expensive, sailplane. The price of the " Kassel 20 " is £49, in Germany ; and that of the " Kassel 25," £78. This deserves special mention as nothing is more important for the popularization of soaring flight than keeping the price for the products of reliable firms as low as possible. I imagine that I have said sufficient to indicate the direction in which we may look for further development in the building of high-efficiency sailplanes. I myself find the questions connected with this development so deeply interesting that I have not been content with seeking for new ways of actual flying, but have also occupied myself with the design side in the hope that I might be lucky enough
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A SorvKXiu OF Tin: ATTIIOK'S VISITS
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Made and Printed in Great Britain b
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vi CONTENTS page A RECORD FLIGHT AB
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viii LIST OF ILLUSTRATIONS No. Plat
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x LIST OF ILLUSTRATIONS No. Plate f
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xii LIST OF DIAGRAMS CURRENTS ON HI
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xiv FOREWORD cross-country flight f
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THE STORY OF MOTORLESS HUMAN FLIGHT
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STORY OF MOTORLESS HUMAN FLIGHT 3 "
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1. AN EVENING FLIGHT OVER THE DUNES
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STORY OF MOTORLESS HUMAN FLIGHT 5 t
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STORY OF MOTORLESS HUMAN FLIGHT 7 i
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STORY OF MOTORLESS HUMAN FLIGHT 9 a
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STORY OF MOTORLESS HUMAN FLIGHT n t
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STORY OF MOTORLESS HUMAN FLIGHT 13
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STORY OF MOTORLESS HUMAN FLIGHT 15
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TllE "t'lIAKLOTTE," A TAILLESS SOAK
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THE HISTORY OF SOARING FLIGHT THE l
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THE HISTORY OF SOARING FLIGHT 19 mu
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THE HISTORY OF SOARING FLIGHT 21 A
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THE HISTORY OF SOARING FLIGHT 23 de
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TIME BRINGS THE ANSWER FEW of the t
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6. OTTO LILIENTHAL, THE "FATHER OF
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TIME BRINGS THE ANSWER 27 work in a
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TIME BRINGS THE ANSWER 29 a hill of
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TIME BRINGS THE ANSWER 31 Not only
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SPEEDIER PROGRESS IN the history of
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S. OTTO LII.IEXTIIAL'S LAST MACHINE
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SPEEDIER PROGRESS 35 The developmen
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SPEEDIER PROGRESS 37 his advanced a
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SPEEDIER PROGRESS 39 to perform suc
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THE WRIGHTS 41 The Wrights calculat
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THE WRIGHTS 43 the brothers made st
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FAMOUS CONTEMPORARIES OTHER men wer
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10. A VIEW OF THE WORKSHOP OF ETRU'
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FAMOUS CONTEMPORARIES 47 only succe
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FAMOUS CONTEMPORARIES 49 to unfores
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FAMOUS CONTEMPORARIES 51 would neve
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FAMOUS CONTEMPORARIES 53 he went to
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12. THE MACHINE BUILT BY KLEMPERER
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TEN YEARS OF COMPETITION & EXPERIEN
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RECORDS 63 succeeded in flying to w
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RECORDS 65 exactly along what lines
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RECORDS 67 and their records. Altho
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RECORDS 69 This feat of endurance w
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15. THE " ESPENLAUB 5 " IN FLIGHT.
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THE LEAN YEARS 71 In the year 1923,
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THE LEAN YEARS 73 interesting on ac
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^ ?%Vif o ItiJV .J
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THE LEAN YEARS 75 thirteen miles, w
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THE LEAN YEARS 77 to be carried out
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ON THE WAY TO SCIENTIFIC FLYING IN
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flights suggested by Professor Geor
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19. THE FAMOUS AIRCRAFT DESKJXEK, F
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ON THE WAY TO SCIENTIFIC FLYING 83
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22. NEHRING, A VERITABLE MASTER IN
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ON THE WAY TO SCIENTIFIC FLYING sti
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OUR EFFORTS REWARDED 91 The most im
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OUR EFFORTS REWARDED 93 From time t
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','4 THE "HAPACE." A FRENCH SOAKER
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OUR EFFORTS REWARDED 95 of an appro
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THE FIRST SIXTY-MILE SOARING FLIGHT
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4 4 At THE AUTHOR'S HKTTRX FROM HIS
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FIRST SIXTY-MILE SOARING FLIGHT 99
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,'30. THE " RnoxfiEisT " (SPIRIT OF
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1,500 0 L-. Facing page 1U4 32. KRO
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SOARING PILOTS REPORT 107 and thirt
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SOARING PILOTS REPORT 109 five hund
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SOARING PILOTS REPORT flying machin
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SOARING PILOTS REPORT 113 me in the
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SOARING PILOTS REPORT 115 at the be
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SOARING PILOTS REPORT 117 another b
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SOARING PILOTS REPORT 119 feet per
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SOARING PILOTS REPORT 121 my though
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SOARING PILOTS REPORT 123 living ar
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SOARING PILOTS REPORT 125 want to w
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SOARING PILOTS REPORT 127 near to u
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SOARING PILOTS REPORT 129 three tho
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SOME FLIGHTS OF MY OWN I MY RIDE WI
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SOME FLIGHTS OF MY OWN 133 violentl
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THE PILOT'S SEAT IN THE " WIEN Faci
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SOME FLIGHTS OF MY OWN 135 Gotha. I
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SOME FLIGHTS OF MY OWN 137 to funct
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SOME FLIGHTS OF MY OWN 139 place. T
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SOME FLIGHTS OF MY OWN 141 unknown
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SOME FLIGHTS OF MY OWN 143 possibil
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SOME FLIGHTS OF MY OWN 145 IV SOARI
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SOME FLIGHTS OF MY OWN 147 mingling
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THE GLIDING AND SOARING SCHOOL 149
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NORMAL. FLI&HT! HOW TO STEER -.., F
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HE TURNS TO THE RIGHT* HOW TO STEER
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44. STALLING : THE MOST DANGEROUS F
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CLIMBING PLIGHT OP A MOTOR PLANE. T
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ON THE WAY TO THE "B" TEST 169 " Th
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ON THE WAY TO THE " B " TEST 171 gi
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ON THE WAY TO THE " B " TEST 173 Th
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ON THE WAY TO THE " B " TEST 175 yo
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ON THE WAY TO THE " B " TEST 177 Gr
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THE SOARING COURSE 179 " Must we pu
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THE SOARING COURSE 181 of eight can
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THE ORDINARY CURVE NECESSARY FOR TH
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THE SOARING COURSE 183 nearer to it
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THE SOARING COURSE 185 make several
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6O° 50. Facing page 186 AXIS OF= I
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HIGH PERFORMANCE FLIGHTS THE flight
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HIGH PERFORMANCE FLIGHTS 189 distan
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HIGH PERFORMANCE FLIGHTS 191 down,
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HIGH PERFORMANCE FLIGHTS 193 both p
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a. KROMFHLD Facing page 1 LANDING,
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HIGH PERFORMANCE FLIGHTS 195 lightl
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HIGH PERFORMANCE FLIGHTS 197 accomp
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facing page TTIE PARALLELOGRAM OF V
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LONG DISTANCE SOARING 199 When vari
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LONG DISTANCE SOARING 201 many long
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LONG DISTANCE SOARING 203 planned f
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LONG DISTANCE SOARING 205 extremely
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LONG DISTANCE SOARING 207 The habit
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LONG DISTANCE SOARING 209 Sundays.
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CLOUD AND THUNDERSTORM SOARING 211
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12,000 9,000 I 6,000 3,000 ATTEMPT
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6300 ,•5600 Q£JUD UPWIND SLOPE U
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2i8 KRONFELD ON GLIDING & SOARING F
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AUTO AND AEROPLANE TOWING THE metho
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AUTO AND AEROPLANE TOWING 229 to oc
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tc c t Ci c t- c r th— C/- H K" V
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AUTO AND AEROPLANE TOWING 231 from
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AUTO AND AEROPLANE TOWING 233 examp
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62. ESPENLAUB'S GLIDER THAT WAS TOW
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AUTO AND AEROPLANE TOWING 235 to th
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AUTO AND AEROPLANE TOWING 237 mater
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AUTO AND AEROPLANE TOWING 239 weigh
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AUTO AND AEROPLANE TOWING 241 allow
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AUTO AND AEROPLANE TOWING 243 exerc
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Page 320 and 321: 64. NORMAL AUTO TOWEU START Facing
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Page 330 and 331: THE CONSTRUCTION OF GLIDING AND SOA
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Page 338 and 339: 71. A "ZOGLING" IN THE AIR. NOTE TH
Page 340 and 341: GLIDING AND SOARING PLANES 259 ing
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Page 344 and 345: 74. THE ELEVATOR. (The Darmstadt Ac
Page 346 and 347: GLIDING AND SOARING PLANES 263 kind
Page 348 and 349: GLIDING AND SOARING PLANES 265 even
Page 350 and 351: GLIDING AND SOARING PLANES 267
Page 352 and 353: GLIDING AND SOARING PLANES 269 taki
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Page 362 and 363: 78. THE " RIIOXADLER," A DOUBLE-SEA
Page 364 and 365: GLIDING AND SOARING PLANES 279 a &
Page 366 and 367: GLIDING AND SOARING PLANES 281 open
Page 372 and 373: 81. THE TRIPARTITE. ONE-SPARRED WIN
Page 374 and 375: COMPARATIVE SIZES OF WELL- KNOWN SA
Page 376 and 377: GLIDING AND SOARING PLANES 289 in o
Page 378 and 379: WEATHER, WIND AND CLOUDS 291 01 Hfc
Page 380 and 381: WEATHER, WIND AND CLOUDS 293 All of
Page 382 and 383: WEATHER, WIND AND CLOUDS 295 dust,
Page 384 and 385: WEATHER, WIND AND CLOUDS 297 high e
Page 386 and 387: WEATHER, WIND AND CLOUDS 299 We hav
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Page 390 and 391: THE TWO FRONTS AND THE WARM SECTION
Page 392 and 393: WEATHER, WIND AND CLOUDS 305 There
Page 394 and 395: THE FUTURE OF SOARING FLIGHT 307 pr
Page 396 and 397: THE FUTURE OF SOARING FLIGHT 309 Th
Page 398 and 399: THE FUTURE OF SOARING FLIGHT 311 No
Page 400 and 401: THE FUTURE OF SOARING FLIGHT 313 th
Page 402 and 403: THE FUTURE OF SOARING FLIGHT 315 is
Page 404 and 405: THE PROGRESS OF SAILPLANING THROUGH
Page 406 and 407: 83. THE " FAFNIR " FLOWN BY GUNTKR
Page 408 and 409: PROGRESS OF SAILPLANING 319 as well
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Page 412 and 413: PROGRESS OF SAILPLANING 323 Wasserk
Page 414 and 415: PROGRESS OF SAILPLANING 325 Hurttig
Page 416 and 417: 8/5. TIIK U.F.I). DAGLING. A PRIMAR
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PROGRESS OF SAILPLANING 327 August
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PROGRESS OF SAILPLANING 329 gliding
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PROGRESS OF SAILPLANING 331 thermal
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PROGRESS OF SAILPLANING 333 in view
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PROGRESS OF SAILPLANING 335 permitt
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PROGRESS OF SAILPLANING 337 perform
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PROGRESS OF SAILPLANING 339 In seve
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THE ENGLISH CHANNEL FLIGHT THE Engl
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87. THE R.F.D. SAILPLANE. Span 14.G
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THE ENGLISH CHANNEL FLIGHT 343 in t
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THE ENGLISH CHANNEL FLIGHT 345 but
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Fttc!>'.g page 31G />// . / cuiirtc
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THE ENGLISH CHANNEL FLIGHT 347 see
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MY SOARING FLIGHTS OVER LONDON 349
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MY SOARING FLIGHTS OVER LONDON 351
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MY SOARING FLIGHTS IN ENGLAND 353 T
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91. UKKR KHOXFELD'S u AUSTRIA " AT
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MY SOARING FLIGHTS IN ENGLAND 355 t
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MY SOARING FLIGHTS IN ENGLAND 357 m
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MY SOARING FLIGHTS IN ENGLAND 359
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MY SOARING FLIGHTS IN ENGLAND 361 t
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MY SOARING FLIGHTS IN ENGLAND 363 a
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MY SOARING FLIGHTS IN ENGLAND 365 c
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MY SOARING FLIGHTS IN ENGLAND 367 e
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MY SOARING FLIGHTS IN ENGLAND 369
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MY SOARING FLIGHTS IN ENGLAND 371 o
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MY SOARING FLIGHTS IN ENGLAND 373 T
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MY SOARING FLIGHTS IN ENGLAND 375 b
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MY SOARING FLIGHTS IN ENGLAND 377 P
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MY SOARING FLIGHTS IN ENGLAND 379 p
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