An Apparatus for Measuring Small Variations in Thrust.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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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 12 sq in was used. Thrust values of 29-30.5 foot pounds were obtained at a chamber pressure of 110 in Hg gage. Two of the nozzles were submerged 0, 20, and 40 of overall nozzle length. Author
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