<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title></title></head><body><p dir="ltr">A Raytheon Standard 22 Gyrocompass is 24 VDC. Crazy expensive though.</p>
<p dir="ltr">Hank - does the problem manifest itself at depth under all circumstances, or only in close proximity to the bottom? I'd be inclined to believe that it is either compass malfunction under pressure, or influence of your vessel throwing it out, rather than local magnetic anomaly. The latter is certainly possible though. Where is it mounted, and do your thrusters or any other operating equipment have an influence on it?</p>
<p dir="ltr">Sean<br>
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<br><br><div class="gmail_quote">On June 27, 2016 7:48:48 AM MDT, "MerlinSub@t-online.de via Personal_Submersibles" <personal_submersibles@psubs.org> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Air or vaccum power will not work in a sub. </span></p>
<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Try a electric one. </span></p>
<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">24 Volt or 12 V are rare - normaly 400 volt and high frequency - you need a transformer. <br /></span></p>
<p style="margin: 0px;"> </p>
<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">But notice: </span></p>
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<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">The get out of course after 0,5 - 2 hours. And will be normaly re-adjust by a magnetic one in a aircraft. </span></p>
<p style="margin: 0px;"> </p>
<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Ebay cheaps are often out of service / out of course. The normaly run but get quick out of course. </span></p>
<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Units with work proper certificate (Airworthy) are much more expensive. </span></p>
<p style="margin: 0px;"> </p>
<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Buy three and select the best working - sale the rest again. </span></p>
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<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">vbr Carsten </span></p>
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<p style="margin: 0px;">-----Original-Nachricht-----</p>
<p style="margin: 0px;">Betreff: Re: [PSUBS-MAILIST] gyro compass</p>
<p style="margin: 0px;">Datum: 2016-06-27T02:18:46+0200</p>
<p style="margin: 0px;">Von: "k6fee via Personal_Submersibles" <personal_submersibles@psubs.org></p>
<p style="margin: 0px;">An: "Personal Submersibles General Discussion" <personal_submersibles@psubs.org></p>
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<div>
<div>Hank, </div>
<div> </div>
<div>Try using a gyro compass ( or atifical horizon) from an aircraft. They sre either air, vaccum or electric powered.</div>
<div> </div>
<div>Keith </div>
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<div> </div>
<div> </div>
<div id="composer_signature">
<div dir="auto" style="font-size: 85%; color: #575757;">Sent from my Verizon, Samsung Galaxy smartphone</div>
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<div> </div>
<div style="font-size: 100%; color: #000000;">
<div>-------- Original message --------</div>
<div>From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org></div>
<div>Date: 6/26/16 4:11 PM (GMT-08:00)</div>
<div>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org></div>
<div>Subject: [PSUBS-MAILIST] gyro compass</div>
<div> </div>
</div>
<div style="color: #000; background-color: #fff; font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;">
<div id="yui_3_16_0_ym19_1_1466982389727_2659" dir="ltr">I am going to try to make a gyro compass, looks doable. I don't care about what direction I am going-I just want to go in a strait line. I will point the sub in the direction I want to go at the surface, then turn on the gyro and sink. Then I can just follow the gyro.</div>
<div id="yui_3_16_0_ym19_1_1466982389727_2659">Hank</div>
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