312 index vol. 27 



PAGE 



Crank-pin 237-239, 243-247 



Crank-shaft 237, 239, 244-246, 250 



he 129, 130, 222, 244, 249 



Currie, RolUi P., report on American Buzzard 289 



Curved surfaces i see also wing curvature) 18, 44, 46, 47, 99 



Cylinders (see also engines, cylinders). 



aluminum in construction of 114 



brass in construction of 54 



steel tubes in 110, 121, 234, 235, 239, 240 



construction of 112. lit, 110, 121. 212, 213, 232, 235, 239, 240, 246 



five, engine 245, 246, 250, 255 



high-pressure 33 



low-pressure 33 



multiple, engine 226 



oscillating 33, 38 



tests of (see also engine tests) 55 



walls of 239 



weight of 246, 247, 250 



D 



Daniell, on energy in storage batteries 27 



Data sheets 297 



Definitions of terms and symbols 14, 15 



Deflection, absence of 269 



de Lucy, on sustaining surfaces 19 



Diedral angle of wings 45, 82, 83, 85, 89, 96, 146 



Dimensions (see aerodrome descriptions and data sheets). 



Distance of flights 103, 107-109, 135-155, 258 



Distortion of wings 82-S4, 91, 9S, 105 



Dry batteries 262 



Duration of flights (see also time) 103, 107, 108, 137, 145, 148, 258 



Dynamometer, use of 222, 228, 229, 230, 242, 247, 249 



E 



Eagle quill and spruce rib, comparative strength of 201 



Early steam motors and other models 30-40 



Efficiency of wings 87, 89, 91, 144, 192, 193 



Eighth-size models : 133, 134, 154 



Elastic limit of rubber 9, 22, 23 



Elasticity of tail 78, 90, 144, 152 



coefficient of 51, 144, 146 



Electric batteries 21. 26, 27, 212, 262, 263 



circuits 70, 212, 22H-223, 237, 241, 257 



Electricity as motive power 24, 26-28 



Energy in foot pounds ( see also lift ) 23-27 



Engine (see also motors) 112-116, 179. ISO. 222-2:T.. 226-233, 234-250, 2S1 



American builders 131, 180, 219, 228 



ai r-cooled 226 



automobile 219 



balancing of 246, 247 



carbonic-acid gas 24, 26-29 



compressed air 11. 24-26, 6S, 112 



construction of. and frames 53-79, 114, 116, 219, 223-233 



tests 234-250 



contract for 126 



cylinders of 33, 38, 54, 112, 114-110. 121. 212. 213, 232. 235-239, 246, 250, 255 



description of one-horse-power 37, 116 



electric 24, 26-28 



European builders 131, 140, 219, 234 



experimental 218-225 



five-cylinder 224, 232, 234-250, 255 



gas (see also gasoline) 26, 28, 131, L33 



gasoline 24, 37, 65, 125, 131, 179, 210, 218, 219, 224, 277 



gunpowder 24, 25 



