John;
True-- a pitot tube output is independent of its diameter. I think that
is because the square- cut tube end looks like a flat disk to the air.
The pressure/area product is constant.
To get low Cd you have to consider induced drag as well.
Regards, Neil Tucson, AZ
-----Original Message-----
From: owner-land-speed@autox.team.net
[mailto:owner-land-speed@autox.team.net] On Behalf Of John Burk
Sent: Thursday, April 07, 2005 2:32 PM
To: land-speed
Subject: Fw: Engine Air Inlets
Neil
To my knowledge a pitot tube pressure/speed chart isn't based on a
certain diameter tube . May-be that's not the best example but it makes
me
think that impact pressure is a constant and a low CD shape just has a
smaller percentage of the frontal area that sees the full impact
pressure .
|