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.
A carburetor jet is a tiny hole in the venturi, which is the narrow end of a carburetor tube. The carburetor jet is an essential component of an internal combustion engine. carburetor jet that draws too much fuel can cause several problems. Excess fuel in the engine reduces fuel efficiency. In addition, it can reduce the life span of an engine by causing wear on engine parts.