The Development of a Closed Vessel Piezo-Electric Recording Equipment
Abstract
An account is given of the development of a Piezo-Electric recording equipment for use, in conjunction with Closed Vessel apparatus, in the assessment of the ballistic characteristics of propellants. Special attention was given to possible use of the recorder in routine testing of propellants, and this consideration, together with that of accuracy, led to the decision that recording should be in terms of rate of pressure rise against pressure. For the same reason, various devices have been incorporated to make the apparatus almost completely automatic in action, apart from the initial adjustment, and to minimize the computations which follow. After a note on the main design considerations, a description of the general arrangement of the final design is given, followed by an account of special features of this final design. The various faults which were detected following the installation of the equipment at the A.R.E., and the steps taken to overcome them, are then described. In conclusion, there are various appendices devoted to such matters as operating instructions, routine adjustments, the rapid assessment of maximum rate of change of pressure, maximum pressure, C.R.T. beam current and calibration writing speeds so that the appropriate adjustments may be made for any particular recording, calibration of the Piezo-Electric Crystal, suggested minor improvements in the design, and the measurement of the recorded curve.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1950
- Accession Number
- ADA492804