The testing of a thermal protection system ( TPS ) in multiple arc jets and laser facilities is critical not only to determine the ability of a material to withstand the harsh aerothermal environments but is also required to collect relevant data that allows construction of a thermal response model of the TPS for flight design . The present talk provides an overview of recent arcjet testing of the HEEET material , one of the families of materials from the 3D Woven TPS program , being developed under NASAs Heatshield for Extreme Entry Environment Technology ( HEEET ) project .