Chuck, that's exactly what we used them for, we thought of building a grid but were too lazy! I really like that idea of the postage scale, that would've been a nice touch to our display, I guess we were too lazy. Howard --- Chuck Hards <chuckhards@yahoo.com> wrote:
Howard, thanks for the UofU science fair tip, I'll certainly try and steer Whitney in that direction.
Were the drinking straws on your wind tunnel used as flow straighteners? I built a wind tunnel as a kid myself, but made a complicated cardboard grid for the purpose, wish I'd hit upon the idea of using tubes (straws), it sure would have been a lot less work. I used inverted, model airfoil sections, attached to a small postage scale with a balsa stick, and measured the pressure exerted on the scale, as an expression of "lift", for the various airfoils. Man, that takes me back- thanks for the trip down memory lane.
From: Howard Jackman <sumoetx@yahoo.com> As a side note I remember my own 9th grade science fair in which my friend and I built a wind tunnel using a defunct fish tank, an old computer fan, a bunch of straws and a bowl of dry ice.
__________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
Visit the Photo Gallery: http://www.utahastronomy.com
__________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com