Aeroheat Structural Test Vehicles: Design, Instrumentation, Manufacture, and Calibration.
Abstract
Six aeroheat motors 6-inch I.D. by 24-inch long were designed, instrumented, and manufactured. All six motors were C.P. configurations with the web fractions based on producing a bore strain of 75%, 100% and 125% of the propellant strain endurance when the motors were at -65 F. Three of the motors referred to as AH-1, AH-2, and AH-3 were loaded with TP-H8227 propellant (a 88% total solids, low rate formulation containing 6.6% HMX to web fractions of 0.77, 0.80, and 0.82, respectively. The remaining three motors - AH-4, AH-5, and AH-6 were loaded with TP-H8220 propellant (a 88% total solids high rate formulation) and had web fractions of 0.79, 0.76, and 0.81, respectively. Four motors did fail during gage checkout. Investigating the fact that these failed at strain levels less than strain endurance revealed that each had failed over the thermocouple array which led to the conclusion that the thermocouple itself was the cause of failure. A description of the motor failures, along with a discussion of the motor design, the grain instrumentation, the motor manufacture procedures and instrumentation methods, the test arrangement, data acquisition procedures, data reduction methods, and the test results are presented in the body of this report.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1976
- Accession Number
- ADA029052
Entities
People
- O. R. Pritts