Lag in Aircraft Altitude Measuring Systems
Abstract
The nature of pressure lag in aircraft altitude measuring systems is discussed and several methods of lag correction are compared. Based upon an extensive experimental program an improved method of lag correction is proposed. Using the lag correction procedure outlined in this report indicated altitude can be corrected to true pressure altitude to an accuracy of 0.5 percent. Other instrumentation uncertainties prevent the attainment of greater accuracy. The influence of the instrumentation system temperature and the pitot-static probe surface temperature on the pressure lag are shown through theoretical and experimental analysis. Instrumentation system temperature has a moderate effect on the lag. The probe surface temperature, however, has no discernible influence on the lag. A system and procedure for ground lag checking on an aircraft static pressure system is presented in an appendix to the report.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1963
- Accession Number
- AD0427017
Entities
People
- Kirk S. Irwin
Organizations
- Air Force Test Center