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.
This 1918 Chevrolet 490 Light Delivery chassis cowl was the first truck model Chevrolet built. The chassis cowl consists of the painted metal parts. The wooden cab and pickup-type body were purchased from an aftermarket manufacturer. It was rated for a payload capacity of 1,000lbs. and sold for $595 retail.