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Aviation History
1917
1917 - 0105.PDF
FEBRUARY I, 1917, f/LtCHT WING LOADING AND LIFT COEFFICIENTS. To facilitate choice of a suitable wing section for any particular performance, we have prepared the accompanying table and graph, the former for accurate calculations from speeds of 20 to 150 m.p.h. ami the Jatter for approximate values. By way of example, if a certain wing section has a lift coefficient of 0-4, from the table the lift per sq. ft. at So m.p.h. JS equal to 32-6 x 0-4 = 13-04 lbs./sq. ft. If the loading is 5 lbs./sq. ft., we see from the graph that a lift coefficient of o*6i is required to give a minimum speed of 40 m.p.h. Flight speed (m.p.h.) Conversion factor ... Flight speed (m.p.h.) Conversion factor ... Flight speed (m.p.h.) Conversion factor ... 20 21 22 23 24 25 36 27 28 20 30 31 32 33 269 SW 318 343 371 398 437 4^9 4'90 5'24 -;:> 34 3S S6 37 # rSC tt>»1 iS-Ult 7'0S 7'372-04 g-g5 t'46 2-69 S'HS S'18 343 S'71 3'98 4'37 4'S9 4'90 5-S4 44 45 46 47 48 49 S» "S» " 5» 53 54, 55 5* 5739 40 41 42 43 ?-h 8*17 S-5S 9=00 9*45 4 46 MS Iw7 48 Jl'7 4 50 51 12-2 IS'7 ISS 58 59 60 61 62 63 64 17-1 17-7 lS'S 1S'9 Jti-6 SO'S S0^ Flight speed (m. p. h.) 77 78 79 Conversion factor ... 30'8 Sl'O SI'S 80 81 82 83 S2'6 33-4 34-3 35*1 65 66 67 68 69 70 71 SI'6 tg'i SB-9 23-d 24'S 2£'J 15" 84 85 86 87 88 89 90 1 36-S 37'7 38-5 S9'S 40-4 4''$ 7» 73 74 75 7* M'4 27-3 27"9 gS-6 Stt'4 91 9a 93 94 95 Flight speed (m.p.h.) 96 97 98 99 100 101 102 103 104 105 106 107 I08 109 "0 "* >W 113 114 Conversion facto? ... 4V0 WO 49-fl oO'O iil'O r.2'0 5S'O 54'0 55'I 60-J 57'2 SS'.i M'4 W(l IU'7 6SS GS'9 65• I ««•_' Flight speed fm.ph.) IIS 116 117 118 119 120 MI 123 123 124 125 ia6 187 128 129 130 131 132 133 Conversion factor ... 67?* 68-6 60S 71'0 7t7S IS-4 74'G 75-9 77-1 7S'4 79'6 80'9 82'2 83S 84'8 HV't S7'6 8»'9 W\$ Flight speed (m.p.h.) 134 135 136 137 138 139 140 141 14a 143 X44 MS Ufi H7 148 J49 *»> Conversion factor ... 0V5 9$?9 94'3 95!7 9ri 98'6 99-9 1G1'4 tOt'8 JO4S 10p7 WS IOS'7 UO't UI'7 113'i 114'7 J'O 0-9 0-8 45
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