. ey ae Project 8,2- Thermal Effects on Cellulosic Materials ~ W, L. Fons OBJECTIVE The objective of Project 8.2 was to expose various combustible materials to the thermal radiation tron NEE (cx0x22) to ascertain the level of energy at which the materials would ignite and burn, INSTRUMENTATION Instrumentation consisted of specimens of materials exposed at , Yurochi (DOG) 35,000 ft and at Aomoen (GEORGE) 49,000 ft from planned target zero, The materials were white, gray, and black alpha-cellulose paper, each of two densities and several thicknesses, newspaper, char- ~ coal-colored rayon cloth, blue cotton denim, dry grass, pine needles, and corrugated Kraft fiberboard. Also exposed were specimens of maple, willow, and balsa woods to ascertain the depth of char produced in woods of different densities by the thermal radiation from a megaton weapon. For exposure, the specimens were mounted in cylindrical metal cells, 4 inches in diameter and 5 inches from the front rim of the cell to the specimen, The cells were mounted in metal boxes, half of which were perforated so that the specimens would come to a high moisture content in equilibrium with the ambient atmosphere, and half of which were closei with a dessicant to keep the specimens at a low moisture content. The boxes were opened at H-15 seconds by EG&G signal, and the cells were pointing at the expected point of burst on Namu (CHARLIE) at the moment of explosion. - COPIED/DOE ; LANL RC = ~ 80 - f /