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<p class="MsoNormal"><span style="font-family:"Eras Medium ITC",sans-serif;color:#1F497D">You guys might also enjoy this video from Smarter Everyday about pullies.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Eras Medium ITC",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><a href="https://www.youtube.com/watch?v=M2w3NZzPwOM">https://www.youtube.com/watch?v=M2w3NZzPwOM</a><span style="font-family:"Eras Medium ITC",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Eras Medium ITC",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Eras Medium ITC",sans-serif;color:#1F497D"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Eras Medium ITC",sans-serif;color:#1F497D">Jamie Hughes</span></b><span style="font-size:12.0pt;font-family:"Eras Medium ITC",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Eras Medium ITC",sans-serif;color:#1F497D">WA7JH<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Eras Medium ITC",sans-serif;color:#1F497D">Phone:
<a href="tel:+13603624575"><span style="color:#1F497D;text-decoration:none">(360) 362-4575</span></a></span><span style="color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Eras Medium ITC",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> PSDR <psdr-bounces@hamwan.org> <b>On Behalf Of </b>
John C. Miller<br>
<b>Sent:</b> Monday, August 17, 2020 14:34<br>
<b>To:</b> Puget Sound Data Ring <psdr@hamwan.org><br>
<b>Subject:</b> Re: [HamWAN PSDR] Shout-out for Blyn workparty yesterday<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Hello all,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">FYI - I've attached a PDF conceptual diagram of the 2:1 lifting rig that we used at Blyn to lift the fully assembled cross-arm assembly with sector with two people lifting.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">The rig employed one 600ft spool of kernmantle 8mm rope, 3 single pulleys, and a tree strap wrapped around a big stump as an anchor point. The load lifted was roughly 70lb,
but the effective weight to the lifters was a bit more than half of that weight, owing to some friction. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">We also used rope ascenders to grip, pull and hold the lift rope. My observations of using ascenders: <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">- One person alone with an ascender was able to easily and reliably hold the entire load in place while the other lifter re-positioned;<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">- An ascender acts as a safety device that limits how far a load will fall if lifters stumble or lose their grip. Given that (at Blyn) we were having to pull walking over
fallen trees, stumps, and down an uneven slope, this extra safety measure was welcome;<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">- An ascender can be used to lock the load in place at any point during the lift (See diagram). This is helpful in that you are not reliant on human strength alone to keep
the load secured, and the load can be held in place indefinitely as required by the tower climbers.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">I think that the ascender is particularly helpful with limited human-power doing the lifting. Speaking for myself, I may not have had enough physical strength to get the job
done without use of a rope ascender. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><a href="https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.petzl.com%2FUS%2Fen%2FSport%2FAscenders%2FASCENSION&data=02%7C01%7C%7C8ac35ccba1b24533612408d842f53fe5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637332968539538155&sdata=p4vt1wFZjsu0cQPVITfzwylNVhAWagNzXDkfqs5vJ5U%3D&reserved=0" target="_blank">https://www.petzl.com/US/en/Sport/Ascenders/ASCENSION</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">p.s I also attached a diagram for a 3:1 mechanical advantage lifting rig, but the rope starts getting a little messy using this setup.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">p.p.s. I put up a temporary 30dBi dish pointed at Blyn S1, and got about -70 dBm with just rough aiming using the LEDs on the radio.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">- John Miller kx7jm<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">---- On Sun, 16 Aug 2020 22:10:46 -0700
<b>Doug Kingston <<a href="mailto:dpk@randomnotes.org">dpk@randomnotes.org</a>></b> wrote ----<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">This is a grand thank you to the dedicated work party that attended at Blyn yesterday for 9-10 hours yesterday (plus travel time). It was a big success Here is what I remember
we accomplished:<o:p></o:p></span></p>
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<span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Lifted a fully assembled cross-arm assembly with sector to 90ft<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Reterminated 5 cables into surge protectors, and dressed all cables<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Relocated a repeater antenna impacted by earlier work<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Confirmed all HamWAN devices fully functional (3 panels and 2 PtP links) + PTZ camera<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt;font-family:"Verdana",sans-serif">No injuries or equipment damage<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:12.0pt;font-family:"Verdana",sans-serif">(and probably more that Dale or Bart can detail)<o:p></o:p></span></li></ul>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Attending:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Bart Kus, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">John Miller, KX7JM<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Dale Nelson, AH6ET<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Elaine Bradtke, KG7CME<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Doug Kingston, KD7DK<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">Mike, our site sponsor was onsite as we commenced operations but needed to leave shortly after we started due to a serious family emergency. Our sympathy goes out to him and
his family.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana",sans-serif">-Doug-<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">_______________________________________________<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">PSDR mailing list<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><a href="mailto:PSDR@hamwan.org" target="_blank">PSDR@hamwan.org</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif"><a href="https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmail.hamwan.net%2Fmailman%2Flistinfo%2Fpsdr&data=02%7C01%7C%7C8ac35ccba1b24533612408d842f53fe5%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637332968539548145&sdata=PdnNIlGc5AuGICTgUX74S6%2F4865FvSjMpbDuNcRt60I%3D&reserved=0" target="_blank">http://mail.hamwan.net/mailman/listinfo/psdr</a><o:p></o:p></span></p>
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