Demonstration of lift for Chanell wing/Coanda effect

[RebelMerc]

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?

[qbond007]

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.

[qbond007]

and the other possibly interesting test would be to give the plate a curved upper surface, as appears in the bluelightning77 demonstration - Doug

[pheonix262]

Is this testing suction as well? if so what worked better?

[Larry3215]

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.

[qbond007]

For a given airspeed, did suction or blowing create the grester lift? Thanks, Doug

[Larry3215]

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.

[pheonix262]

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?

[Nonetub]

Hey man, I'm doing experimental tests like you and it works. Send me a private message if you want to share results.

[Larry3215]

I removed the silly comment.

[jedus1]

Stop that. Seriously. You're not being cool. You're not impressing anyone. And you'll just end up getting hurt in the end.

[MunchieMonkey]

Cool... so due to the air flow from the fan design, the pressure is reduced to 0 over the scale, QED: strategically located & employed as either an exaust or intake over a wing would create lift or negate pressure over the wing. How about within a hover platform?

[jasonguyperson]

was this in grams? i can't see it that clearly... and is this a pressure differential?

[Larry3215]

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.