Page:Aerial Flight - Volume 1 - Aerodynamics - Frederick Lanchester - 1906.djvu/459


 * Helmholtz, on discontinuous motion, §§ 99, 104; Helmholtz-Kirchhoff, pressure on infinite lamina, §§ 97, 136; surface of gyration, § 99, App. III.; surface of discontinuity unstable, App. III.
 * Homomorphous motion, in fluid system, general expression for,§ 38
 * Horse-power in flight, tables of, § 220
 * Hutton, pressure on normal plane, § 136; experiments in resistance, 221, 222
 * Hydrodynamic theory, general treatment, Chs. I. and II.; analytical theory of inviscid fluid, § 57 et seq.; applied to conservative system of sustentation, § 121 et seq.


 * Impulsive forces, in fluid dynamics, § 60
 * Infinite lateral extent, special case of, § 115; aeroplane in pterygoid aspect, case of, § 152
 * Infinitesimal load, special case of, § 115
 * Interchangeability, of velocity and linear quantities in the dimensional equation of resistance, §§ 43, 45; of φ and ψ in hydrodynamic plotting, § 61
 * Inviscid, definition of, § 58
 * Irrotation, definition of, § 68; in its relation to velocity potential, § 70
 * Irrotational motion, fundamental forms, § 73; compounding by super-position, §§ 73, 74


 * Joessel, centre of pressure for square plane, § 148


 * Kinematic relations, kinematic-viscosity and kinematic-resistance, § 36
 * Kinetic discontinuity. See Discontinuity.
 * Kinetic energy. See Energy.
 * Kirchhoff-Rayleigh, equation for inclined infinite lamina, §§ 97, 152; plotting, § 152; position of centre of pressure and magnitude of pressure reaction, table, § 97
 * Kummer, centre of pressure, § 148


 * Lagrange's theorem, an interpretation of, § 71
 * Lanchester, form of aerofoil used in 1894, § 108; experiments by, see Author's experiments.
 * Langley, pressure on normal plane, §§ 133, 136; experiments with falling plane, a direct disproof of sine-squared law, § 146; curve for plane in apteroid aspect, § 161; curve for plane in pterygoid aspect, § 153; form