An Apparatus for Measuring Small Variations in Thrust.

摘要

The report describes a development of instrumentation and techniques for evaluating performance of small convergent-divergent nozzles with a precision of at least 0.99. The nozzles tested were mounted on a pendulum thrust chamber. During testing the thrust chamber would deflect an aluminum strip on which was mounted a strain gage used to evaluate thrust for various chamber pressures. A throat area of approximately 1/2sq in was used. Thrust values of 29-30.5foot pounds were obtained at a chamber pressure of 110in Hg gage. Two of the nozzles were submerged 0%, 20%,and 40% of overall nozzle length. (Author)