Demonstration of lift for Chanell wing/Coanda effect
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Uploader Comments (Larry3215)
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Hi Larry
Q: if the intake creates better lift will changing shape the surface of the air flows across increase the lifting effect.
Meaning will making the surface more wing like produce better lift with less power?
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Also the lift is because of Bernoullis principal: fast fluid/air over a surface=low pressure. The Coanda effect describes how air/fluid flows around a curved surface. Does this work with any flat surface where the air is flowing over it?
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and the other possibly interesting test would be to give the plate a curved upper surface, as appears in the bluelightning77 demonstration - Doug
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Thanks Larry. I wondered if you had arranged the fan so the lip of the exhaust (when blowing) and intake(When sucking) were both lined up level with the flate plate. Your findings might explain why the custer wing gave results better than were achievable with blown wings.
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Hey man, I'm doing experimental tests like you and it works. Send me a private message if you want to share results.
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Is this testing suction as well? if so what worked better?
pheonix262 2 years ago
As the title screen says - intake and exhaust :) The first 1:30 of the video is intake suction from the fan. The the last part is exhaust blowing over the scale.
Larry3215 2 years ago
For a given airspeed, did suction or blowing create the grester lift? Thanks, Doug
qbond007 2 years ago
Watch the video and you will see that when the fan is sucking its able to produce at least 25 grams of lifting force on the scale. In pusher mode it was only able to produce a few grams at most.
Larry3215 2 years ago
I removed the silly comment.
Larry3215 3 years ago
was this in grams? i can't see it that clearly... and is this a pressure differential?
jasonguyperson 3 years ago
Yeah, the scale is reading grams and yes, the reaings are from the pressure drop over the scale due to the air flow from the fan.
Larry3215 3 years ago