Page:Aerial Flight - Volume 1 - Aerodynamics - Frederick Lanchester - 1906.djvu/462

 * Proximity to earth's surface, influence on load sustained, § 112
 * Pterygoid aspect, planes in, §§ 152, 153
 * Pterygoid aerofoil, best values of β, least gliding angle, § 173, 174, 181


 * Rankine, theory of propulsion, §§ 8, 198; plotting stream lines, § 78; "water lines" derived from source and sink system, § 77
 * Rayleigh, momentum of sound waves, App. II.; see also Kirchhoff-Rayleigh.
 * Resistance, nature of fluid resistance, § 1 et seq.; as a function of velocity, § 41 ; as a function of size, 42; characteristic curve of, § 43; least resistance, conditions of, § 163 et seq.; complete equation, § 171; of aerodone in flight, plotting, § 176; load for least resistance, §§ 186, 187; of a new kind of hypothetical medium, App. VII.
 * Resolution of forces, in case of inclined aeroplane, §§ 128, 156, 167
 * Reversal, of relative pressure reaction, critical angle of, § 153
 * "Rift," Stokes', § 99
 * Robins, inventor of the whirling table, an early experimenter in aerodynamics, § 221
 * Robinson, enunciation of pressure law for inclined aeroplane, § 146
 * Rotation, in fluid dynamics, conservation of, § 65; measured by boundary circulation, § 66; of fluid, mechanical illustration, § 69
 * "Run." See Entrance.


 * Sail area (or wing area), measurement of, § 193
 * Sailing vessel, peripteral theory applied to the, App. VIII.
 * "Scale" of fluid, as due to the viscosity, §§ 36, 56
 * Screw propeller, theory of, § 202 et seq. ; peripteral theory, blade treated as analogue of aerofoil, § 202; efficiency of, §§ 203, 204, 235; blade equivalent to sum of its elements, § 205; efficiency computed over whole blade, § 206; thrust grading, § 206; load grading, distribution of pressure on blade, §§ 207, 208; linear grading, § 209; peripteral zone and area, § 210 ; number of blades, § 211; conjugate blade limits, § 212; marine propeller, §§ 214, 215; cavitation, § 215; relative reaction borne by back and face of blade, § 215; marine propeller, limiting blade velocity, § 215
 * Sectional form, of aerofoil, §§ 107, 108, 118, 188; of aeroplanes used by Langley and Dines. § 153
 * Simply connected, meaning, §§ 62, 63
 * Sine-squared law, curve representing, §§ 147, 151; plausibility of the, § 149; applicable in particular case, § 150. See also Newtonian method.
 * Skin-friction, no slipping of fluid at surface, § 33; investigation and law of, 34, 35; Froude's experiments in sea water, §§ 47, 48; roughened surfaces, §§ 48, 246; magnitude of, coefficient of, § 157; in its relation