<div dir="auto">Hank, would you also be using a magnetic plate to connect your power supply contacts? I was thinking of an oring sealed plate compressed with the magnets could do the trick. <div dir="auto">David</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jul 15, 2019, 7:08 PM Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div></div><div>Hank,</div><div>thinking this through more; if you had your vertical thrusters in a slot that</div><div>takes the vertical thrust, then this may impede the detachment of the thruster</div><div>if the only force you can apply to the thruster is vertical to break it free from</div><div>the magnets. Ie. If a rope is caught in the thruster & you have blown ballasts</div><div>then the pull on the rope would be vertical & against the edge of the slot.</div><div> If the magnets were mounted inside the hull & you removed them, then you</div><div>would have a lot more chance of getting the thruster to drop off.</div><div>Alan</div><div><br>On 16/07/2019, at 10:37 AM, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div></div><div>Hank,</div><div>the magnets in my open underwater motor from Blue Robotics are coated</div><div>with a marine epoxy & are used in seawater.</div><div>There are large free magnets in old microwaves. I have some tiny 1/4"</div><div>neodymium magnets & they magnetise through an inch of wood.</div><div>I would experiment with putting the magnets inside the hull, & having a metal base</div><div>on the thrusters; that way you could assist in the breakaway of the thruster by</div><div>removing the magnets, rather than just rely on pulling power. Additionally you </div><div>wouldn't need to paint them & could experiment more readily with the power by </div><div>adding & subtracting. Another thought is having magnetic bases that are </div><div>used for mounting dial gauges; you could turn their switch to remove them.</div><div>Good idea re magnets Hank, hadn't considered that. </div><div>Alan</div><div><br>On 16/07/2019, at 9:10 AM, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div class="m_6710571327997187573ydp5baf4992yahoo-style-wrap" style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><div></div>
<div dir="ltr">Alan, </div><div dir="ltr">Yes I will make a pocket to take the vertical force. I think since the magnets are so cheap, I will just replace them when they corrode. Maybe spray them with WD-40. I did that with my hatch spring and it is amazing how well it worked.</div><div dir="ltr">Hank</div><div><br></div>
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On Monday, July 15, 2019, 3:02:24 PM MDT, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>> wrote:
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<div><div id="m_6710571327997187573yiv2287314857"><div><div></div><div>Hank,</div><div>If you could mount them in a slot so that the vertical thrust pushes against the</div><div>edges of the slot, that would require less power from the magnets. ( you were</div><div>probably planning that anyway). </div><div>Magnets are corrosive so you would have to either coat them or mount them</div><div>Inside the hull. They should magnetise through the hull if strong enough.</div><div>If the magnets were mounted inside the hull you may be able to knock them</div><div>sideways out of the way to help release the thruster.</div><div>I would have some way of pinning the thrusters during transport, & take the</div><div>magnets off ( some how ) during storage.</div><div>One thought is that a powerful electro magnet may help with the removal of</div><div>the magnets.</div><div>Alan</div><div class="m_6710571327997187573yiv2287314857yqt1510180083" id="m_6710571327997187573yiv2287314857yqt22390"><div><br clear="none">On 16/07/2019, at 8:25 AM, hank pronk via Personal_Submersibles <<a rel="nofollow noreferrer" shape="rect" href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div><div class="m_6710571327997187573yiv2287314857yahoo-style-wrap" style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><div dir="ltr">Hi All, I want to make magnetic bases for my vertical thrusters on E3000. The thrusters are mounted to the hull section that jettisons witch is bad. I figure the best way to jettison the motors in my case is to mount them with magnets that will break away. Anyone try this?</div><div dir="ltr">Hank</div></div></div></blockquote></div><blockquote type="cite"><div><span>_______________________________________________</span><br clear="none"><span>Personal_Submersibles mailing list</span><br clear="none"><span><a rel="nofollow noreferrer" shape="rect" href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a></span><br clear="none"><span><a rel="nofollow noreferrer" shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br clear="none"></div></blockquote></div></div><div class="m_6710571327997187573yqt1510180083" id="m_6710571327997187573yqt81592">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="noreferrer">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="noreferrer">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div></div>
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