FREE-AIR AND GROUND-LEVEL PRESSURE MEASUREMENTS
Abstract
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1952
- Accession Number
- AD0357974
Entities
People
- C. J. Aronson
- E. J. Culling
- E. R. Walthall
- J. F. Moulton Jr.
- J. Petes
Organizations
- Naval Ordnance Laboratory