THE NON-EXITENCE OF STEADY ACOUSTIC LAG IN AIRBRONE PRESSURE MEASURING SYSTEMS

摘要

This short report is a corrigendum to Reference 1. It is established experimentally that the, so-called, acoustic lag in the tubing of pressure measuring systems is non-existent for the simple case when the time rate of change of pressure is approximately constant. This conclusion is supported by a theoretical analysis. n In the formulae for lag, presented in Reference 1, all terms involving the speed of sound in tubing, a', should, therefore, be neglected. The empirical law for viscous lag (Ref.1) gives the total lag of the system.