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.
CYLINDERS. A cylinder is the power unit of an engine; itâs the chamber where the gasoline is burned and turned into power. (For more on what goes on inside the cylinders, see How Engines Work .) Most cars and SUV enginess have four, six, or eight cylinders.Generally, an engine with more cylinders produces more power, while an engine with fewer cylinders gets better fuel economy.For more on what goes on inside the cylinders, see How Engines Work .) Most cars and SUV enginess have four, six, or eight cylinders. Generally, an engine with more cylinders produces more power, while an engine with fewer cylinders gets better fuel economy.