WorldCat Identities

Walthall, E. R.

Works: 3 works in 4 publications in 1 language and 3 library holdings
Roles: Author
Publication Timeline
Most widely held works by E. R Walthall
SHOCK WAVE PHOTOGRAPHY by J. Fletcher Moulton( Book )

2 editions published between 1955 and 1958 in English and held by 2 WorldCat member libraries worldwide

The project was responsible for (1) determining the peak shock overpressure as a function of distance on Shot 10, the high-altitude shot; (2) studying the effects of the surface and the heating of the air near the surface on precursor formation, growth, and shock interaction for a number of yields and heights of burst over natural and artificial surfaces; and (3) ascertaining, prior to Shot 12, whether coalescence of the incident and reflected shocks could be expected to occur directly above the burst and, if so, determining the peak overpressure at given distances on that shot. Both smoke-grid photography and direct-shock photography, techniques similar to those used on previous tests, were employed in the successful accomplishment of these major objectives
Free-air and ground-level pressure measurements( Book )

1 edition published in 1952 in English and held by 1 WorldCat member library worldwide

The Naval Ordnance Laboratory participated in all four air burst shots of Operation TUMBLER at the Nevada Proving Grounds by measuring freeair peak pressures and pressure variation with time by means of rocket smoke-trail photography and by measuring pressure-time data at ground level by means of Bendix inductance gages using an FM transmission system. As the free-air data scaled well, a reliable composite free-air pressure-distance curve from 6 to 800 psi has been obtained in terms of 1 KT (Radiochemical) at sea level. Efficiencies in free-air were estimated to be of the order of 45 per cent compared to cast TNT spheres at about the 20 psi level. Decay constants and impulses calculated from particle displacement measurements scaled well with high explosives results; but the free-air pressure-time curves themselves were arrived at by such smoothing processes that no fine structure of the pressure- time history could be determined from them
Instrumentation and payload design for lunar roving vehicles by E. R Walthall( Book )

1 edition published in 1963 in English and held by 0 WorldCat member libraries worldwide

Audience Level
Audience Level
  Kids General Special  
Audience level: 0.96 (from 0.95 for SHOCK WAVE ... to 1.00 for Instrument ...)