Investigation of Pitot and Static System Leak Effects
Abstract
This report presents the results of an investigation of the effects of leaks into pitot-static systems. Flight test data was obtained on a KC-135A. Ground tests on the aircraft pitot-static systems and laboratory tests produced the data needed to interpret the flight test results and to show the effects of parameters not investigated in flight. The program was initiated as a result of the AIMS related tests to identify and correct sources of altimetry system errors. The tests identified the primary parameters affecting leak-induced altimeter errors as leak hole size and pressure differential across the hole for a specific system geometry. Secondary effects were leak location, airspeed, and to a limited extent, altitude. The static system volume significantly affected the rate of change of change of indicated altimeter values during ground leak checks. Airspeed indicator errors due to pitot system leaks were primarily dependent on airspeed, cabin pressure, and leak hole size. The continued use of current Air Force pitot-static system leak check criteria should result in negligible airspeed and altitude errors.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1976
- Accession Number
- ADA044956
Entities
People
- Michael F. Marquardt
Organizations
- Air Force Test Center