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<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>If you know
someone who either paraglides or hanglides or is a sailplane pilot; today’s
pilots fly with electronic flight log & variometers that are +/- 3 to 6
feet. If you measure the low and then proceed to the high point next, These
units work off of barometric pressure and are quite reliable, just do not
measure the low one day and then the high a day or week later. I have used mine
a number of times and been right on so far 100% of the time when we have
measure the standing static pressure down the road.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks
-<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Dana
Orzel<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Great
Solar Works, Inc<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>www.solarwork.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>E
- dana@solarwork.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>V
- 970.626.5253<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>F
- 970.626.4140<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>C
- 970.209.4076<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>“I'd
put my money on solar energy… I hope we don't have to wait 'til oil and
coal run out before we tackle that.”</span><span lang=EN
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>—Thomas
Edison, in conversation with Henry Ford and Harvey Firestone, March 1931</span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='margin-left:.5in'><b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Jason
Lombard<br>
<b>Sent:</b> Tuesday, January 27, 2009 3:02 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] GPS units<o:p></o:p></span></p>
</div>
<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'>William,<br>
<br>
Topographic maps are great if your familiar with them. A laser if you can
afford it or the best I have heard of is fill a tube or pipe with water from
the pump to your tank and measure the psi at the base of it. The calculation is
2.31 feet of lift for every psi. Not everyone has their piping rolled out or on
site yet so this could be a challenge and again is very accurate.<br>
<br>
BTW - GPS units are inaccurate to the extent that they are 40 feet off
horizontally and 90 feet vertically. This means you could be up to 130 feet
off. Big difference when your sizing for particular pump out put.<br>
<br>
Good luck,<o:p></o:p></p>
<div>
<p class=MsoNormal style='margin-left:.5in'>On Tue, Jan 27, 2009 at 2:34 PM,
William Miller <<a href="mailto:wrmiller@charter.net">wrmiller@charter.net</a>>
wrote:<o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'>Does anyone have a foolproof tool to measure
elevation? I have researched GPS units recently. They are
notoriously inaccurate for elevation:<br>
<br>
<a href="http://wiki.motionbased.com/mb/GPS_Unit_Elevation" target="_blank">http://wiki.motionbased.com/mb/GPS_Unit_Elevation</a><br>
<br>
Here are few more links with GPS fundamentals:<br>
<br>
<a href="http://www.adventurenetwork.com/cgi-bin/adventurenetwork/GPS_101.html"
target="_blank">http://www.adventurenetwork.com/cgi-bin/adventurenetwork/GPS_101.html</a><br>
<a href="http://www.gpsreview.net/electronic-compass/" target="_blank">http://www.gpsreview.net/electronic-compass/</a><br>
<br>
I have a Suunto Observer watch with an altimeter. I think I can get
relatively accurate measurements of DIFFERENCE in elevation if I measure the
two elevations in quick succession. I will be trying it.<br>
<br>
<br>
<br>
William<br>
<br>
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<br>
-- <br>
Jason Lombard<br>
Open Hand Solar LLC.<br>
Certified Sustainable Building Adviser<br>
<a href="mailto:openhandsolar@gmail.com">openhandsolar@gmail.com</a><br>
505 795 8646<br>
<br>
"I'd put my money on solar energy… I hope we don't have to wait 'til
oil and coal run out before we tackle that."<br>
<br>
—Thomas Edison<o:p></o:p></p>
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