ABSOLUTE UNITS.
Units given in terms of mass. For expression in terms of pounds (Gravitational units) they must be multiplied by some factor involving the value of gravitation. Thus, to convert units of mass into pounds, the mass must be multiplied by the value of gravitation, 32.16 being the average figure taken for this quantity. To convert the absolute lift factors given by the N.P.L. into pounds per square foot per mile per hour, multiply the absolute value by O.005IV².
The temperature at which heat ceases to exist. This is 461 degrees below the Fahrenheit zero, or 273 degrees below the Centigrade zero.
To increase in speed.
Steel.
A word originated by Lanchester to denote the science of stability.
See AEROFOIL.
A thin wing-like structure designed to obtain lift by the reaction of moving air upon its surfaces.
A science investigating the forces produced by a stream of air acting upon a surface.
The resistance caused by turbulence or eddies.