Page:Aerial Flight - Volume 1 - Aerodynamics - Frederick Lanchester - 1906.djvu/458


 * Elasticity, influence of, on resistance, § 55; as defining pressure-density relation, § 58; influence of, on power expended in flight. App. I.
 * Electro-magnetic analogy, App. VI.
 * Energy, expended in fluid resistance, § 40; kinetic, in system of flow, § 81; kinetic, in ψ, φ, squares equal, § 81; of the fluid surrounding a cylinder in motion, § 83; of superposed systems, §§ 84, 85; of vortex pair, § 86; numerical illustration of energy theorem, § 87; conditions of minimum expenditure in flight, §§ 163, 164; in the periptery, § 123
 * Entrance and run, § 11
 * Equation of continuity, § 59
 * Equations of motion, § 59
 * Equilibrium, of ballasted aeroplane, § 162
 * Eulerian theory, the, § 59 et seq.; deficiencies of, §§ 98, 99
 * Evanescent load, special case considered, §§ 104, 115
 * Experimental confirmation of dimensional theory of resistance, Froude's experiments, §§ 47, 48; Dines, §§ 49; Allen, § 50
 * Extremities, form of, §§ 120, 191


 * Field of force, §§ 60, 113
 * Finite lateral extent, conditions considered, § 117
 * Flight, power expended in, §§ 219, 220; estimated extreme range of, § 220; of golf ball, § 30; bounding or leaping, App. IV.
 * Flow, lines of, § 79
 * Fluids, properties of, §§ 1, 31, 58
 * Fluid prismatic column, as defining application of Newtonian method, § 112
 * Flux (ψ function), § 61
 * Force, lines of, field of, §§ 60, 113
 * Frictional wake, due to viscosity, § 17; its influence on propulsion, §§ 200, 216
 * Froude, theory of propulsion, §§ 8, 198, 200, 216; negative slip of propeller, § 200; pressure on normal plane, §§ 135, 136


 * Gliding angle, conditions governing, §§ 166, 167; least value, § 174; equation for, § 174; for least horse power, § 176; in excess of theoretical value, § 181
 * Grading, of aerofoil, 192; of propeller blade, §§ 208, 209
 * Gull (Larus argentatus), wing pressure and velocity of flight, § 187; wing section, § 107
 * Gyration surface (Helmholtz), § 99, also App. III.


 * Height of aeroplane above earth's surface, as affecting load sustained, § 112