PRIMARY PACKAGE

The primary package instrumentation measures those parameters critical to all engine static firings and subsequent vehicle launches. These include some 70 parameters such as pressures, tempera­tures, flows, speeds, and valve positions for the engine components, with the capability of trans­mitting signals to a ground recording system or a telemetry system, or both. The instrumentation system is designed for use throughout the life of the engine, from the first static acceptance firing to its ultimate vehicle flight.

AUXILIARY PACKAGE

The auxiliary package is designed for use during early vehicle flights. It may be deleted from the basic engine instrumentation system after the pro­
pulsion system has established its reliability during research and development vehicle flights. It con­tains sufficient flexibility to provide for deletion, substitution, or addition of parameters deemed nec­essary as a result of additional testing. Eventual deletion of the auxiliary package will not interfere with the measurement capability of the primary package.