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Hi Jim & All, Feb 22, 2012
I wonder if blades with bent tips have been tried to minimize or =
perhaps even eliminate this barotrauma.
These were used on light aircraft about 20 years ago (don't recall =
the term or how they panned out) to increase efficiency and reduce noise =
(?).
Yt, Dave Webster, Kentville=20
----- Original Message -----=20
From: James W. Wolford=20
To: NatureNS ; Hugh Broders ; Howie Huynh ; Andrew Hebda ; Donald =
McAlpine ; Fred Scott ; Fred or Helen Archibald ; Helene d'Entremont ; =
Greg Bezanson ; Jeff Ogden=20
Sent: Wednesday, February 22, 2012 2:24 PM
Subject: [NatureNS] Date: Wed, 22 Feb 2012 14:10:52 -0400
<snip>
Andrew also talked about the effects of wind turbines on bats. He =
said the research to date has been mostly in Alberta and Manitoba, and =
the affected bats are mostly what are called the tree bats or migrating =
bats, such as hoary bats, red bats, & silver-haired bats, which do =
migrate at the heights of industrial wind turbines and are affected by =
high-pressure barotrauma without necessary contact with the moving =
blades. Here in the Maritimes we are at the edges of the ranges of the =
tree bats, so that they are not common here and thus are somewhat less =
of concern regarding impacts of wind farms. Most of our Maritime bats =
are little brown bats, northern long-eared bats, and tricoloured bats or =
pipistrelles.=20
Cheers and happy listening, from Jim in Wolfville.=20
-------------------------------------------------------------------------=
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No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1424 / Virus Database: 2113/4825 - Release Date: =
02/22/12
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<META content=3D"text/html; charset=3Diso-8859-1" =
http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 8.00.6001.19170">
<STYLE></STYLE>
</HEAD>
<BODY=20
style=3D"WORD-WRAP: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space"=20
bgColor=3D#ffffff>
<DIV><FONT size=3D2>Hi Jim & All, =
=20
Feb 22, 2012</FONT></DIV>
<DIV><FONT size=3D2> I wonder if blades with bent tips =
have been=20
tried to minimize or perhaps even eliminate this =
barotrauma.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2> These were used on light aircraft =
about 20=20
years ago (don't recall the term or how they panned out) to =
increase=20
efficiency and reduce noise (?).</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Yt, Dave Webster, Kentville</FONT> </DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"=20
dir=3Dltr>
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><B>From:</B>=20
<A title=3Djimwolford@eastlink.ca =
href=3D"mailto:jimwolford@eastlink.ca">James W.=20
Wolford</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dnaturens@chebucto.ns.ca=20
href=3D"mailto:naturens@chebucto.ns.ca">NatureNS</A> ; <A=20
title=3Dhugh.broders@SMU.CA href=3D"mailto:hugh.broders@SMU.CA">Hugh =
Broders</A> ;=20
<A title=3Darchangel353ca@yahoo.ca =
href=3D"mailto:archangel353ca@yahoo.ca">Howie=20
Huynh</A> ; <A title=3DHEBDAAJ@gov.ns.ca =
href=3D"mailto:HEBDAAJ@gov.ns.ca">Andrew=20
Hebda</A> ; <A title=3DDonald.McAlpine@nbm-mnb.ca=20
href=3D"mailto:Donald.McAlpine@nbm-mnb.ca">Donald McAlpine</A> ; <A=20
title=3Dfwscott@eastlink.ca href=3D"mailto:fwscott@eastlink.ca">Fred =
Scott</A> ;=20
<A title=3Dhfarchibald@ns.sympatico.ca=20
href=3D"mailto:hfarchibald@ns.sympatico.ca">Fred or Helen =
Archibald</A> ; <A=20
title=3Dhelene.dentremont@acadiau.ca=20
href=3D"mailto:helene.dentremont@acadiau.ca">Helene d'Entremont</A> ; =
<A=20
title=3Dbezansong@agr.gc.ca href=3D"mailto:bezansong@agr.gc.ca">Greg =
Bezanson</A>=20
; <A title=3Dogdenjb@gov.ns.ca href=3D"mailto:ogdenjb@gov.ns.ca">Jeff =
Ogden</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, February 22, =
2012 2:24=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [NatureNS] Date: Wed, =
22 Feb=20
2012 14:10:52 -0400</DIV>
<DIV><FONT size=3D2><snip></FONT><BR></DIV>
<DIV style=3D"MARGIN: 0px"><FONT style=3D"FONT: 12px Helvetica" =
size=3D3=20
face=3DHelvetica>Andrew also talked about the effects of wind turbines =
on=20
bats. He said the research to date has been mostly in Alberta =
and=20
Manitoba, and the affected bats are mostly what are called the tree =
bats or=20
migrating bats, such as hoary bats, red bats, & silver-haired =
bats, which=20
do migrate at the heights of industrial wind turbines and are affected =
by=20
high-pressure barotrauma without necessary contact with the moving=20
blades. Here in the Maritimes we are at the edges of the ranges =
of the=20
tree bats, so that they are not common here and thus are somewhat less =
of=20
concern regarding impacts of wind farms. Most of our Maritime =
bats are=20
little brown bats, northern long-eared bats, and tricoloured bats or=20
pipistrelles. </FONT></DIV>
<DIV style=3D"MARGIN: 0px"><FONT style=3D"FONT: 12px Helvetica" =
size=3D3=20
face=3DHelvetica><BR></FONT></DIV>
<DIV style=3D"MARGIN: 0px"><FONT style=3D"FONT: 12px Helvetica" =
size=3D3=20
face=3DHelvetica>Cheers and happy listening, from Jim in=20
Wolfville. </FONT></DIV>
<HR SIZE=3D1 noShade>
<A></A>
<P class=3Davgcert align=3Dleft color=3D"#000000">No virus found in =
this=20
message.<BR>Checked by AVG - <A=20
href=3D"http://www.avg.com">www.avg.com</A><BR>Version: 10.0.1424 / =
Virus=20
Database: 2113/4825 - Release Date: =
02/22/12</P></BLOCKQUOTE></BODY></HTML>
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