Current testing requirements for high temperature alloys are defined in general industry specifications (ASTM, AMS), as well as in user specifications. Many of these requirements were established in the 1960's when production practices were yet to be refined.
cowling - protective covering consisting of a metal part that covers the engine; there are powerful engines under the hoods of new cars; the mechanic removed the cowling in order to repair the plane's engine.
internal combustion engine. noun. Tweet. : a type of engine that is used for most vehicles: an engine in which the fuel is burned within engine cylinders.ull Definition of INTERNAL COMBUSTION ENGINE. : a heat engine in which the combustion that generates the heat takes place inside the engine proper instead of in a furnace. See internal combustion engine defined for English-language learners.