FLIGHT-TEST ANALYSIS OF APOLLO HEAT-SHIELD MATERIAL USING THE PACEMAKER VEHICLE SYSTEMNASA Technical Note D-4713, pp. 8, 1968-08, accessed 2024-10-29. "Avcoat 5026-39/HC-G is an epoxy novolac resin with special additives in a fiberglass honeycomb matrix. In fabrication, the empty honeycomb is bonded to the primary structure and the resin is gunned into each cell individually. ... The overall density of the material is 32 lb/ft3 (512 kg/m3). The char of the material is composed mainly of silica and carbon. It is necessary to know the amounts of each in the char because in the ablation analysis the silica is considered to be inert, but the carbon is considered to enter into exothermic reactions with oxygen. ... At 2160° R (1200° K), 54 percent by weight of the virgin material has volatilized and 46 percent has remained as char. ... In the virgin material, 25 percent by weight is silica, and since the silica is considered to be inert the char-layer composition becomes 6.7 lb/ft3 (107.4 kg/m3) of carbon and 8 lb/ft3 (128.1 kg/m3) of silica."
Textron Systems HistoryArchived November 30, 2010, at the Wayback Machine, 1984 History, "Textron acquires Avco, including Lycoming, to become Avco Systems Textron", 2010, accessed 2010-11-27.
Textron Systems HistoryArchived November 30, 2010, at the Wayback Machine, 1984 History, "Textron acquires Avco, including Lycoming, to become Avco Systems Textron", 2010, accessed 2010-11-27.
