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Europa-List: Re: Airspeed Sensor Switch

Subject: Europa-List: Re: Airspeed Sensor Switch
From: D Wysong <hdwysong@gmail.com>
Date: Tue, 11 Mar 2008 03:12:13

>  Hi All,
>  Does anyone have an idea what 60 knots equates to in PSI?

Hello Troy,

The math says the differential pressure (Pd, Ptotal - Pstatic) is
equal to 0.5*airDensity*V*V for a given velocity, V.

60 knots is roughly 100 ft/sec.  Assuming a standard sea level density
and slogging through the ugly units conversions, the Pd would be ~2.65
PSI.

Pd = 0.5 * 0.002377 slug/ft^3 * 32.2 lbf s^2/ft / slug * 100 ft/s *
100 ft/s / 144 in^2/ft^2  (... told you it was ugly)

I hope that doesn't add more mud to the water.

D



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