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.
These 10 facts about space will blow your mind. The engine block is the linchpin of vehicles that run on internal combustion, providing the powerhouse for the vehicle. It is called a block because it is usually a solid cast car part, housing the cylinders and their components inside a cooled and lubricated crankcase.