<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>That could still be done Brian.</div><div>The "Dive Tracker Sport" has a 4000ft range & indicates position by you</div><div>sweeping the receiver unit so that it's LEDs light up strongest in the direction of</div><div>the transmitter. You could have a mechanism that swept the receiver continually</div><div>& records the direction that is associated with the strongest signal. Then drives</div><div>in that direction or stops if it is straight above. However you may as well have</div><div>a support boat doing that.</div><div>Cheers Alan</div><div><br><br>Sent from my iPad</div><div><br>On 14/09/2016, at 5:35 pm, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="font-family:Arial, sans-serif; font-size:10pt;"><div>Alan,</div><div> I was thinking no lines anywhere, just sonar back and forth between the sub and the buoy. Maybe like a Doppler indicator , like if it's moving away it would know because of the diminishing sound, so the buoy would likely have to swim in circles always trying to get closer to the subs signal. I don't know if there would be enough variation at that distance to be able to do it though. Seems like it could be done seeing how accurate these fish finders are these days !</div><div> </div><div>Brian <br><br>--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:<br><br>From: Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>Subject: Re: [PSUBS-MAILIST] Retractable Reel<br>Date: Wed, 14 Sep 2016 05:10:59 +0000 (UTC)<br><br></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"><div><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"><div><span>Brian,</span></div><div dir="ltr"><span>that is doable. You could have a winch that keeps a certain</span></div><div dir="ltr"><span>tension on the line & have the line running through a ring,</span></div><div dir="ltr"><span>say a foot down below the buoy. When there is an angle on the</span></div><div dir="ltr"><span>line it would pull the ring in a certain direction; the ring movement</span></div><div dir="ltr"><span>would tell the rov to move in that direction till the pressure was </span></div><div dir="ltr"><span>off the ring. </span></div><div dir="ltr"><span>You could make most of that up with RC parts for boats</span></div><div dir="ltr"><span>apart from the winch. I think you would be looking at at least $500-</span></div><div dir="ltr"><span>in parts to do it, plus a lot of time.</span></div><div dir="ltr"><span>Alan</span></div><div dir="ltr"><span></span><br></div><div><br><br></div></div></div></div><div> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div><br><br></div><div><div dir="ltr"> <font face="Arial" size="2"> </font><hr size="1"> <b><span style="font-weight: bold;">From:</span></b> Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</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> Wednesday, September 14, 2016 3:01 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Retractable Reel<br> </div> <div><br><div><div><div style="font-family: Arial, sans-serif; font-size: 10pt;"><div>The ideal thing would be to have an autonomous rov buoy which would shadow your sub on the surface ! But how to communicate between the two ? Sonar ?</div><div> </div><div>Brian <br><br>--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:<br><br>From: Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>Subject: Re: [PSUBS-MAILIST] Retractable Reel<br>Date: Tue, 13 Sep 2016 20:07:48 +0000 (UTC)<br><br></div><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"><div><span>James,</span></div><div dir="ltr"><span>why do you want to drag your dog around behind your submarine?</span></div><div dir="ltr"><span> I have thought of having a float that I can send up when ascending,</span></div><div dir="ltr"><span>to alert surface boats to my position. The idea is to send it up from about </span></div><div dir="ltr"><span>the 20 - 30ft mark, & have a retracting mechanism to wind in the slack.</span></div><div dir="ltr"><span>There are plenty of divers reels to utilize as a starting point. Lasse's thread</span></div><div dir="ltr"><span>on using a pneumatic driver got me thinking that a simple pneumatic turbine</span></div><div dir="ltr"><span>with a feed pressure of around 4psi would pull any slack line in & let a large</span></div><div dir="ltr"><span>enough float pull it out. </span></div><div dir="ltr"><span>It may be a bit more complex in your scenario, as you will have the force from</span></div><div dir="ltr"><span>drag to consider.</span></div><div dir="ltr"><span>Other thoughts are to start with the divers reel & copy a retracting mechanism</span></div><div dir="ltr"><span>from somewhere, but using a 316 stainless clock spring of the right size & torsion.</span></div><div dir="ltr"><span>Let us know how you get on.</span></div><div dir="ltr"><span>Alan</span></div><div dir="ltr"><span></span><br></div><div><br><br></div><div style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"> <font face="Arial" size="2"> </font><hr size="1"> <b><span style="font-weight: bold;">From:</span></b> James Frankland via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</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> Tuesday, September 13, 2016 11:35 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] Retractable Reel<br> </div> <div><br><div><div dir="ltr"><div>Anyone got any ideas for a retractable reel? I need to have a SMB but I don't want rope trailing around all over the place.</div><div> </div><div>I was thinking of something like one of those automatic retracting dog leads. So it will auto wind up and down. </div><div> </div><div>Ive searched for something suitable off the shelf but cant find anything.</div><div> </div><div>I don't have a through hull available for a manual winding one.</div><div> </div><div>Im temped to use 2 of those dog leads. One on the bobber, one on the boat with them joined in the middle. That would give me about 20 meters. Of course, they would disintegrate after the first use, but ive got several old ones at home that could be sacrificed.</div><div> </div><div>Or, some sort of retracting device that could be put inside the bobber?</div><div> </div><div>any thoughts?<br><br>regards</div><div>James</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> </div></div></div>_______________________________________________
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