Re: [MBZ] OT Owls and the quest for quieter wind energy/ 3D printing

2015-06-23 Thread Rich Thomas via Mercedes
I saw that yesterday, quite interesting.  We looked into some bird stuff 
when I was in kawledge, always fascinating to see nature's (intelligent) 
designs.


I was on the farm once some years ago, went out for a stroll late one 
night and there was a big owl sitting on top of the barn.  I stopped and 
stood there and watched it a few minutes while it watched me.  I decided 
to head back in and as I was walking back it flew right over my 
shoulder, wings almost touched my head, and I could not hear it a bit.  
(WHOA that was a surprise!)  It was pretty cool, I probably had stirred 
up a mouse or something, it flew right down to the ground in front of me 
but did not grab anything.


There is a place here called the Center for Birds of Prey that rescues 
injured birds and rehabilitates them.  Some can't go back to the wild so 
they keep them and go our and do demonstrations here and there.  I have 
been to a few and one time they had a big owl, when it flew you couldn't 
hear it either but the hawks and eagles made a fair amount of whooshing 
noises.


--R



On 6/23/15 10:31 AM, Andrew Strasfogel via Mercedes wrote:

I found this very cool.

Want quieter wind farms? Owls may have the answer

Monday, 22 Jun 2015 | 9:06 AM ETCNBC.com

 From computer fans to wind turbines, fan blades are commonplace, but
there's no denying they can be noisy. Now, a team of researchers at the
University of Cambridge have said help may be on hand -- from a feathered
friend.

By studying the wing structure of owls, the researchers have designed a
material that shows substantial signs of noise reduction, and could make
fan blades much quieter in years to come.

[image: CAN55_Location_FOA_11]
Ian Evenden/PhotoPlus Magazine | Future | Getty Images

Early tests of the prototype coating -- made of 3D-printed plastic --
revealed that noise from wind turbine blades was reduced by 10 decibels,
without any signs of an impact on aerodynamics.

This is not a major noise reduction, but the researchers stressed that if
it was used in wind farms, turbines could run at higher speeds without
creating any extra noise, therefore producing more energy.

Read MoreHow your feet can light up a street
http://www.cnbc.com/id/102759873

Owls are known for their stealthy predatory skills, and scientists have
attributed this to their silent flying skills. It was because of this that
the University of Cambridge, along with three U.S. institutions, used
high-resolution microscopy to examine the structure of owl wings and their
feathers to see if it could be replicated.

Much of the noise caused by a wing – whether it's attached to a bird, a
plane or a fan – originates at the trailing edge where the air passing over
the wing surface is turbulent, lead researcher, Professor Nigel Peake,
said in a statement.

The structure of an owl's wing serves to reduce noise by smoothing the
passage of air as it passes over the wing – scattering the sound so their
prey can't hear them coming.

Read MoreRenewable power will overtake coal if pledges kept
http://www.cnbc.com/id/102759547

The scientists designed their own coating, which scatters sound like owls
do. The next stage is to apply the coating on a large-scale functioning
turbine and potentially even aeroplanes – although the researchers conceded
this would be far more complicated.

Virginia Tech, Lehigh and Florida Atlantic Universities worked with the
University of Cambridge on the research, which was funded by the U.S.
Office of Naval Research and U.S. National Science Foundation.

Read MoreCheck out this bar, it's a hoot! http://www.cnbc.com/id/102451128
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Re: [MBZ] OT Owls and the quest for quieter wind energy/ 3D printing

2015-06-23 Thread WILTON via Mercedes
'Reminds me:  Early one morning 'bout 30 years ago, I was at  my van in the 
driveway of a rental house I had then preparing to do some painting there. 
I heard a gaggle of geese honking behind some trees a half block or so away, 
and I looked up to see them climbing out from a small lake behind the trees 
and coming straight toward me.  As they continued pumping their wings hard 
in the climb, I could hear the steady, nearly imperceptible hiss of their 
slipstream interspersed with the rhythmic swoosh of their wings in perfect 
unison - a beautiful sound and a beautiful sight on a quiet, still morning. 
Also interesting to note their gear-up and perfectly tucked in to complete 
beautifully streamlined undersides.


Wilton

- Original Message - 
From: Rich Thomas via Mercedes mercedes@okiebenz.com

To: mercedes@okiebenz.com
Cc: Rich Thomas richthomas79td...@constructivity.net
Sent: Tuesday, June 23, 2015 10:52 AM
Subject: Re: [MBZ] OT Owls and the quest for quieter wind energy/ 3D 
printing



I saw that yesterday, quite interesting.  We looked into some bird stuff 
when I was in kawledge, always fascinating to see nature's (intelligent) 
designs.


I was on the farm once some years ago, went out for a stroll late one 
night and there was a big owl sitting on top of the barn.  I stopped and 
stood there and watched it a few minutes while it watched me.  I decided 
to head back in and as I was walking back it flew right over my shoulder, 
wings almost touched my head, and I could not hear it a bit.  (WHOA that 
was a surprise!)  It was pretty cool, I probably had stirred up a mouse or 
something, it flew right down to the ground in front of me but did not 
grab anything.


There is a place here called the Center for Birds of Prey that rescues 
injured birds and rehabilitates them.  Some can't go back to the wild so 
they keep them and go our and do demonstrations here and there.  I have 
been to a few and one time they had a big owl, when it flew you couldn't 
hear it either but the hawks and eagles made a fair amount of whooshing 
noises.


--R



On 6/23/15 10:31 AM, Andrew Strasfogel via Mercedes wrote:

I found this very cool.

Want quieter wind farms? Owls may have the answer

Monday, 22 Jun 2015 | 9:06 AM ETCNBC.com

 From computer fans to wind turbines, fan blades are commonplace, but
there's no denying they can be noisy. Now, a team of researchers at the
University of Cambridge have said help may be on hand -- from a feathered
friend.

By studying the wing structure of owls, the researchers have designed a
material that shows substantial signs of noise reduction, and could 
make

fan blades much quieter in years to come.

[image: CAN55_Location_FOA_11]
Ian Evenden/PhotoPlus Magazine | Future | Getty Images

Early tests of the prototype coating -- made of 3D-printed plastic --
revealed that noise from wind turbine blades was reduced by 10 decibels,
without any signs of an impact on aerodynamics.

This is not a major noise reduction, but the researchers stressed that if
it was used in wind farms, turbines could run at higher speeds without
creating any extra noise, therefore producing more energy.

Read MoreHow your feet can light up a street
http://www.cnbc.com/id/102759873

Owls are known for their stealthy predatory skills, and scientists have
attributed this to their silent flying skills. It was because of this 
that

the University of Cambridge, along with three U.S. institutions, used
high-resolution microscopy to examine the structure of owl wings and 
their

feathers to see if it could be replicated.

Much of the noise caused by a wing – whether it's attached to a bird, a
plane or a fan – originates at the trailing edge where the air passing 
over

the wing surface is turbulent, lead researcher, Professor Nigel Peake,
said in a statement.

The structure of an owl's wing serves to reduce noise by smoothing the
passage of air as it passes over the wing – scattering the sound so their
prey can't hear them coming.

Read MoreRenewable power will overtake coal if pledges kept
http://www.cnbc.com/id/102759547

The scientists designed their own coating, which scatters sound like 
owls

do. The next stage is to apply the coating on a large-scale functioning
turbine and potentially even aeroplanes – although the researchers 
conceded

this would be far more complicated.

Virginia Tech, Lehigh and Florida Atlantic Universities worked with the
University of Cambridge on the research, which was funded by the U.S.
Office of Naval Research and U.S. National Science Foundation.

Read MoreCheck out this bar, it's a hoot! 
http://www.cnbc.com/id/102451128

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To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com




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