<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Vent from mbt--you do it anyway to slow ascent, then do it some more to hover at fifty feet so the surface support boat can find you. </div><div>Vance<br><br>Sent from my iPhone</div><div><br>On Mar 21, 2014, at 1:21 AM, "Brian Cox" <<a href="mailto:brian@ojaivalleybeefarm.com">brian@ojaivalleybeefarm.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="font-family:Arial, sans-serif; font-size:10pt;">Is there a preferred method of releasing a big bubble?<br><br>--- <a href="mailto:VBra676539@AOL.com">VBra676539@AOL.com</a> wrote:<br><br>From: Vance Bradley <<a href="mailto:VBra676539@AOL.com">VBra676539@AOL.com</a>><br>To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>Subject: Re: [PSUBS-MAILIST] magnetic coupler<br>Date: Thu, 20 Mar 2014 21:03:12 -0400<br><br><div>The air bubble to the surface is a time honored practice for sub ops. Much cheaper than all the electronic tracking gear on Alvin.</div><div>Vance<br><br>Sent from my iPhone</div><div><br>On Mar 20, 2014, at 7:57 PM, Alan James <<a href="mailto:alanlindsayjames@yahoo.com">alanlindsayjames@yahoo.com</a>> wrote:<br><br></div><blockquote><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 14pt; background-color: rgb(255, 255, 255);"><div><span>Thanks Hank,</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>I was thinking it would come together fast. Might be a sod to get apart again.</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>Maybe you could use a smaller magnetic coupler for other functions on a submarine.</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>For instance it could be the axle in a drum of cord that the emergency buoy or an ascent</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>warning buoy could be released with. The power of the magnet would stop the drum from</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>rotating & releasing line, but if you pulled the magnet out of the housing slightly you could</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>control the release speed of the buoy & avoid a birds nest in the line. If you had a drive on it</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>it could be set to slip against the buoancy of he buoy but reel in line if there was slack.</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>I've thought that sending up a buoy before ascending would be a good way of warning your tender</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>or any other pleasure craft. The tourist subs in Hawaii send up a huge bubble of air. The tender spots</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>this & radios an acknowledgement that they are clear before the ascent.</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span>Alan</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 18.88px; font-style: normal; background-color: transparent;"><span><br></span></div><div><br></div> <div style="font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 14pt;"> <div style="font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight: bold;">From:</span></b> hank pronk <<a href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</a>><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, March 21, 2014 10:07 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] magnetic coupler<br> </font> </div> <div><br><div><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255);"><div><span>Alan,</span></div><div><span>The oil filter looking part is the barrier that keeps the water out of the sub. There is a magnet inside the barrier that is connected to the propeller shaft. When you assemble this thing you need to be real carful. The first time I slid the magnet assemblies together I almost lost a finger. If the propeller gets jammed, the magnet drive would slip like a clutch. It would take a lot though, my magnet drive is bigger than it needs to be. The propeller assembly can still drop off in an emergency, that is all the same still. I am pretty happy with the whole conversion, it can not leak! </span></div><div><span>Hank</span></div><div style="display: block;"> <br> <br> <div style="font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 12pt;"> <div><div dir="ltr"> <font face="Arial" size="2"> On Thursday, March 20, 2014 1:04:29 PM, Alan James <<a href="mailto:alanlindsayjames@yahoo.com">alanlindsayjames@yahoo.com</a>> wrote:<br> </font> </div> <div><div><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; font-size: 14pt; background-color: rgb(255, 255, 255);"><div><span>Hi Hank,</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue,;"><span style="background-color: transparent;">The part that looks like an oil filter is the covering over a rotating
magnet?</span><br></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue,;"><span>The second part is the full assembly that fits over the magnet (oil filter) portion.</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue,;">What sort of force is involved when you put together or pull the two magnetic portions apart?</div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue,;">If you jammed the propellor on something the internal magnet would still rotate</div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue,;">but can it pull apart separating the propellor & it's obstruction from the coupler?</div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue,;">I've added a link to the coupler.</div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue,;"></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue,;"><span><a href="http://www.psubs.org/projects/1327775450/gammarestoration/">http://www.psubs.org/projects/1327775450/gammarestoration/</a><br></span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue,;">Alan</div><div><br></div> <div style="font-family: HelveticaNeue,;"> <div style="font-family: HelveticaNeue,;"> <div><div dir="ltr"> <div style="margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204, 204); height: 0px; line-height: 0; font-size: 0px;"></div>
<font face="Arial" size="2"> <b><span style="font-weight: bold;">From:</span></b> hank pronk <<a href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</a>><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, March 20, 2014 10:26 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] magnetic coupler<br> </font> </div> <div><br><div><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue,;"><div>Anyone that may be interested, I posted a couple of pictures of my magnetic drive coupler assembly. It is kinda chunky at about 9in long. I can NOT overpower
the coupler by hand, it is incredible how strong it is. I pressure tested the assembly to 625 psi for one hr with no issues. I will oil fill the shaft tube to lubricate the outboard shaft bearing and protect against corrosion. This was a simple two day conversion with minimal machining required.</div><div>Hank</div></div></div></div><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div></div> </div>
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