Re: Science fair and Gas mileage
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.
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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.
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Howard Jackman