Improvement of Accuracy of Balanced-Pressure Indicators and Development of an Indicator Calibrating Machine

Abstract

In an investigation to improve the accuracy of balance-pressure indicators, the most serious error in light-spring diagrams made with a conventional clamped-diaphragm balanced-pressure indicator was found to be a zero shift due to elastic stress in the diaphragm. This error can be reduced to negligible proportions by leaving the edges of the diaphragm free, thus eliminating the practice of clamping the edges of the diaphragm between the backing plates. The use of such a free-diaphragm unit affords a means of obtaining very satisfactory light-spring diagrams from a high speed engine.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1949
Accession Number
ADA380467

Entities

People

  • James C. Livengood

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Assembly
  • Aviation Gasoline
  • Clearances
  • Engines
  • Errors
  • Frequency
  • High Pressure
  • Indicators
  • Manometers
  • Measurement
  • Repetition Rate
  • Resonant Frequency
  • Square Waves
  • Temperature Gradients
  • Vibration
  • Waves

Readers

  • Fluid Dynamics.
  • Inertial Navigation Systems.
  • Systems Analysis and Design