Page:Aerial Flight - Volume 1 - Aerodynamics - Frederick Lanchester - 1906.djvu/457


 * Cyclic motion, simple case, § 62; irrotational, § 64; a cyclic function, § 64; nature of, § 64; two opposite cyclic motions, superposed on translation, § 86; on translation, force at right angles, §§ 89, 90; superpositions plotted, § 122; in simply connected region, § 125; in different planes, compounding of, § 127; in propeller race, § 217
 * Cylinder, streamlines of, §§ 21, 79; energy in fluid, § 83


 * Dead-water, meaning of term, § 19; negative pressure in the, § 139
 * Design of propeller, § 218
 * Density, relative, of air and water, § 1; as related to pressure, § 58
 * Dimensional investigation, law of fluid resistance, § 36
 * Dimensional method, application to phenomenon of discontinuity, § 105
 * Dines' experiments, § 223 et seq.; reference to publications, § 223; basis of method, § 224; centrifugal balance, §§ 223, 225; results of resistance experiments, § 226; aeroplane investigations, S§ 227, 228; currents on back of plane, § 228; pressure on normal plane, §§ 133, 136; perforated plates, § 143; curve for square plane, § 147; comparison of results, Dines, Langley, § 153; on law of fluid resistance, § 49
 * Dipping front edge, see Arched section; rudimentary development in the ornithoptera, § 184
 * Discontinuity, physical and kinetic, §§ 12, 19, 94 et seq.; resistance due to, 19; surface of, due to corners or sharp curves, §§ 18, 20; doctrine of kinetic, §§ 20, 94 et seq.; surface of discontinuity a stratum in viscous fluids, § 20; experimental demonstration of, § 21; consequences and examples of, §§ 21, 30; surface of kinetic discontinuity unstable, § 101, App. III.; kinetic, doctrine of, Kelvin's objections, §§ 100, 101, 102; case of normal plane, § 97; explanation of anomalous case of fluid resistance by doctrine of kinetic discontinuity, § 55
 * Discontinuous flow. See Discontinuity.
 * Displacement of fluid due to body in motion, § 15; its orbital character, § 16; demonstrated by smoke experiments, § 17; Rankine's investigation, § 18; due to fluid in motion, § 29
 * Dissipation of supporting wave, § 117
 * Dragon-fly, wing pressure and velocity, § 187
 * Duchemin, formula and curve plotted, § 147
 * Dynamical equations, § 59
 * Dynamic support, Newtonian basis, § 109; broadly considered, § 111; without expenditure of energy, § 111


 * Economics of flight, § 163 et seq.
 * Efficiency, of propulsion, § 198; of screw propeller, § 206
 * Efflux theory, § 95 et seq.; in its relation to pressure on a normal plane, § 140