# Fluid Mechanics: pitot static tube/manometer system

1. Oct 3, 2009

### ywkim880801

1. The problem statement, all variables and given/known data
A water-filled manometer is connected to a Pitot-static tube to measure a nominal airspeed of 50 ft/s. It is assumed that a change in the manometer reading of 0.002 in. can be detected. What is the minimum deviation from the 50 ft/s airspeed that can be detected by this system?

2. Relevant equations
velocity measurement for a pitot-static tube

V=$$\sqrt{}2(p3-p4)/\rho$$