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Aviation History
1920
1920 - 0501.PDF
MAY 6, 1920 v •-- -.the data from wind-tunnel tests, as only comparative resultswere required. Section Maximum speed Minimum power Climb • m.p.h. h.p. ft. per min. R.A.F. 6 .. 122 65 1,470 No. 53 .. 126 — ." '• 4SS> -' 1,470 No. 53 .. ( 140 56 1,750 Compared with the R.A.F. 6, No. 53 section under thesame conditions of structural resistance gives the same power to climb and increases the maximum speed 4 m.p.h.Without interplane bracing this section increases the climb about 20 per cent., and the maximum speed from 122 to140 m.p.h. It seems evident from these tests on models that wingsmay be designed with ample room for cantilever spars and have at the same time aerodynamic properties comparingfavourably with the thin sections used now. This subject of varying section wings is so large that onlya beginning has been made in this report, for there is an almost infinite number of variables to study. The results,however, show enough promise to warrant further research From the h.p. curves plotted (Plot 29), assuming with wings in which the chord and thickness are varied in.a curve of available h.p., the following summary is a more complex manner. The thick tapered wings should .obtained :— also be tested on full-sized machines. Ordinates.—In each case the ordinates are given for the distances from the centre of span (in inches) indicated at the top of the columns. gg>lll '"§ 33 sfl S3 -2aj 5§ 4j Qd i2 •H-o u 3 o 2 4 12 16 R.A 9-1 lbs o- £•& Veloc i ihm. p 230 128 92 79 63 56 55 F. 6, ., sq. ft. 036 h.p . requi r 3,590 37° 131 93 68 65 92 No 8-8 lbs 0 • -b-a Veloc i in m. p 180 "3 90 77 64 56 55 53.., sq. ft. J36 "2 h. P . requi r 95° 228 125 89 69 66 81 No. 8-8 lbs 0 • Veloc i in m.p . 180 113 90 7764 56 55 53., sq. ft. 317 •8 h.p . requi r 650 155 89 66 56 57 72 Is • OO IO -20 30 40 5O «6o -7o 80 90 a: 00 120 140 160 180 -20O 22O 24O 26O 280 300 11Si •00 10 20 3° 40 5° .60 70 So 90 100 J2O I40 I6O l8o 2OO 22O 24O 2O0 28O 3OO No. 40* • 044 •094 •132 •160 •181 •186 •207 •216 •223 •228 •230 •228 •221 •207 •190 •170 •147 •122 •094 •065 •O32 No. 41* 0 •070 •145 •202 •246 •278 •301 •318 •333 •343•35° •353 •35O •34O •318 •292 •263 •226 •187 •144 •100 •050 3 •067 •140 •196 •238 •270 •292 •309 •323 •333•339 •343 •339 •329 •309 •283 •255 •219 •181 •140 • 097 •049 5 •064 •132 •185 •225 •254 •275 •291 •304 •313 •319 •323 •319 •310 •291 •267 •239 •207 •171 •132 •091 •046 No. 45* : 0 •070 •145 •202 •246 •278 •301 •318 •333 •344•35° •353 •35O •34°•318 •292 •261 •226 •187 •144 •100 •050 3 •065 •134•189 •228 •258 •279 •296 •3°9 •318 •324 •327 •324 •313 •295 •270 •242 •210 X74 -I33 °93 046 5 •056 •"5 •161 •196 •221 •240 •253•263 •273 •279•281 •278 •271 •253 •232 •207 •180 •149 •115 •079 •040 7 •042 •087 •121 •148 •167 •180 •191 •200 •206 •210 •212 •210 •204 •191 -I75 •158 •136 •112 •087 •060 •030 9 •O2; •O4C •O6C •O&'i •09^ •102 •10I •Ii; •Ii; •lie •I2C •115 •ir€ •10S •09s •089 .077 •063 •049 •°34 •017 7 •057 •118 •165 •200 •227 •245 •260 •271 •280 •285 •288 285 •277 260 238 213 184 152 118 081 041 0 •095 •195 •273 •332 •375 •406 •430 •449 •463•472 •477•472 •458 43° •394 •353•3°5 •252 •195 •*34•068 9 •044 •094 •132 •160 •181 •196 •207 •216 •223 •228 •230 •228 •221 •207 •190 •170 •147 •121 •094 •065 •032 0 •095 •195 •273 •332 •375 •406 •43° •449 •463 •472 •477 •472 •458 •43O •394 •353 •3O5 •252 •195 •134 •068 No. 46 3 •087 •179 •250 •305 •344 •373 •395 •413 •425 •433 •437 •433 •420 •395 •361 •324 •280 •231 •179 •123 •062 5 •073 •150 •211 •256 •289 •312 •331 •346 •356 •363 •367 •363 •353 •331 •303 •271 •235•194 150 •103 •052 3 No. 42* •091 •187 •261 •319 •359 •389 •412 •43O •442 •452 •457 •452 •439 •412 •377 •338 •29:z •242 •187 •128 •06^ * 7 •052 •108 •150 •183 •206 •223 •236 •247 •254 •259 •262 •259 •252 •236 •217 •194 •168 •139 •107 •074 •037 i 5 •083 •170 •240 •290 •328 •355 •376 •393 •4°5•414 •417 •412 •402 •376 •345 •3O9 •267 •221 •171 •ir7 •060 9 •024 •049 •069 •084 •094 •102 •108 •113 •117 •119 •120 •119 •116 •108 •099 •089 •077 •063 •049 •O34 •017 7 •069 •142 •199 •242 •273 •296 •313 •327 •337 •344 •348 •344 •334 •313 •287 •257 •222 •183 •142 •098 •049 • • • • • • • • • • • • • • • • •( 9 044 094 132 160 181 196 207 216 223 228 230 228 221 207 1 go 170 147 [22 '94 •P65 •(>32 0 •119 •245 •344 •417 •472 •511 •541 •565 •582 •594 •600 •594 •577 •541 •495 •444 •384 •317 •245 •169 •084 3 •113 •233 •327 •397 •448 •485 •514 •536 •553 •564 •57O •564 •547 •514 •472 •422 •365 •301 •233 •160 •080 No. 50 fUnder-surface 0 •000 • 02a •042 •060 •074 •090 •100 •109 •116 •121 •123 •121 •Il8 •I IO •IOO •O87 •073 •O58 •O4O •02O •000 3 •000 •020 •035 •052 •064 •079 •087 •096 •101 -106 •109 •106 •103 •097 •087 •076 •064 •050 •035 •017 •000 5 •000 •oie •025 •041 •051 •062 •o6g •O75 •080 •084 •085 •084 •082 •076 •069 •060 •050 •040 •028 •014 •000 7 •000 •009 •016 •023 •029 •035 •039 •043 •045 •047 •048 •047 •046 •043 •O39 •O34 •029 •022 •016 •008 •000 9 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 No. 43* 5 7 •107 •208 •293 •354 •401 •434 •460 •480 •495 •5O5 •510 •505 •490 •460 •421 •377 •326 •269 •208 •144 •072 •08l 165 •232 •28l •318 •345 •364 •381 •393 •402 •405 •402 •389 •366 •334 •300 •259 •214 •165 113 •057 No. 5ij 0 •°95 •195 •273 •332 •375 •406 •430 •449 •463 •472 •477 •472 •458 •43O •394 •353 •305 •252 •195 •134 •068 9 •024 •049 •069 •084 •094 •102 •108 •113 •117 •119 •120 •119 •116 •IO8 •099 •089 •077 •063 •O49 •O34 •<"71 9 •044 •094 •132 •161 •181 •196 •207 •216 •223 •228 •230 •228 •222 •207 •190 •170 •147 •122 •094 •065 •032. 0 •044 •094 •132 •160 •181 •196 •207 •216 •223 •228 •230 •228 •221 •207 •190 •170 •147 •122 •094 •065 • 032 3 •042 -089 •125 •152 •172 •186 •196 •204 •211 •216 •218 •216 •209 •196 •180 •161 •139 •"5 •089 •062 •031 No. 44 5 •037 •080 •112 •136 •154 •167 •176 •184 •190 •194 •196 •194 •188•176 •162 •H5 •126 •104 •080 •055 •027 No. 52* 0 •°95 •195 •273 •332 •375 •406 •430 •449 •463 •472 •477 •472 •458 -43O •394 •353 •305 •252 •195 •134 •068 3 •055 •113 •159 •193 •218 •236 •250 •261 •269 •274 •277 •274 •267 •250 •229 •205 •177 •147 •113 •078 •040 5 o3t •07/ •io£ •132 •14? •161 •I7C •178 •184 •187 •i8g •187 •182 •170 •156 •140 •121 •10O •078 •053 •027 7 •027 •056 •078 095 •io7 •116 •123 •128 •132 •134 •136 •134 •131 •123 •113 •102 •O88 •O72 •056 •O38 •OI9 9 •024 • 049 •069 •084 •094 •102 •108 •113 •117 •119 •120 •119 •Il6 •IO8 •099 •089 •077•063 • O49 •O34 •017 7 •031 •067 •094 •113 •128 •139 •147 •153 •158 •162 •163 •162 •157 •147 •135 •120 •104 •086 •067 •046 •023 9 •024 •049 •069 •084 094 •102 •108 113 •117 •119 •120 •119 •116 •108 099 •0S9 •077 •063 •049 034 •017 No. 53§Under- surface 0 •000 •023 •042 •060 •074 •090 •100 •109 •116 •121 •123 •121 •118 •no •100 •087 073 •058 •040 •020 •000 9 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •000 •OOO •000 •000 * The lower surface is plane, and ordinates given are the distances of the upper surface above this in inches. f Ordinates below chord line upper-surface same as No. 46. % Straight line between centre section and tip. Under-surface flat. - . ... j Upper-surface the same as No. 51. v" : 501
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