Is it then safe to say that a thermal airspeed meter will not be accurate in
a vacuum unless pressure is taken into account?

Bill

----- Original Message ----- 
From: "Olin Lathrop" <olin_piclist@embedinc.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Friday, October 29, 2004 7:39 AM
Subject: Re: [PIC:] PIC-based thermal airspeed meter


> Ward, David wrote:
> > The temperature gradient isn't a big problem as the proposed method
> > compares the temperature of two sensors, one of which is in the
> > airstream.
> > It's the cooling effect of the airstream that is being measured
>
> Yes, but this does vary with pressure.  Think of the limiting case where
you
> have a vacuum, which doesn't cool at all.
>
>
> *****************************************************************
> Embed Inc, embedded system specialists in Littleton Massachusetts
> (978) 742-9014, http://www.embedinc.com
>

_______________________________________________
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist