Noise reducing props!
Description
geekologie.com/2010/02/impressive-building-a-silent-h.php
and of course wondered if this could be done on a smaller scale. So I made some!
PLEASE try these out for me, I will work on them and perfect them if they reduce noise even the slightest. 9x4.5 with 6mm centre hole.
Thanks guys!
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Ill print a pair out when i get a chance on the weekend. though I may have to scale them down as I have an UP! Plus printer, 140-140-135mm build space
CJ
For a diagnostic spectral sound comparison you need to design identical ones just without the arrow tips.
Owls can fly quietly because they have fuzzy edges on their feathers that break the wind up.
I'm pretty sure that A) the same sound issues that affect a helicopter don't affect a quad due to subsonic tip velocity and B) in the design these are supposed to actually be vibrated up and down by motors to break up vortices. If you notice the sound clips on that site the only sound that is decreased is the loud supersonic "clapping" sound that helicopters make, and that toy helicopters decidedly don't. That said these look awesome and if I had a quad I would totally try these out :)
Haha, I've been waiting for this comment. Yeah I know dude, it's all just a bit of fun :)
Having said that, the tips on this blade should still make it more efficient, even if they do nothing for noise. You can read about swept rotor tips and other rotor tip designs here:
http://www.sciencedirect.com/s...
Bare minimum they'll make your quaddie look bad ass.
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I am busting to see how these go. Has anyone printed any props and had success flying?