<table cellspacing="0" cellpadding="0" border="0"><tr><td valign="top">Alan,<br/><br/>I'm going to assume that auxiliary steering means a secondary means of moving the primary surface. As in a sailboat using a tiller as backup for an inop pedestal.<br/><br/>Joe <a href="http://overview.mail.yahoo.com?.src=iOS"><br/><br/>Sent from Yahoo Mail for iPad</a></td></tr></table> <div id="_origMsg_">
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Alan James <alanlindsayjames@yahoo.com>; <br>
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Personal Submersibles General Discussion <personal_submersibles@psubs.org>; <br>
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Re: [PSUBS-MAILIST] G.L. Propulsion & Manoeuvring Equipment <br>
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Mon, Jan 20, 2014 10:31:44 AM <br>
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<td valign="top"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:10pt;"><div><span>Hi Havard,</span></div><div style="color:rgb(0, 0, 0);font-size:13px;font-family:HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;background-color:transparent;font-style:normal;"><span>I'm going through the Germanic Lloyds rules for classification & certification of submersibles & </span></div><div style="color:rgb(0, 0, 0);font-size:13px;font-family:HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;background-color:transparent;font-style:normal;"><span>summarizing it for people that may be interested. Most of the group come from the U.S.A where</span></div><div style="color:rgb(0, 0, 0);font-size:13px;font-family:HelveticaNeue, 'Helvetica Neue', Helvetica, Arial,
'Lucida Grande', sans-serif;background-color:transparent;font-style:normal;"><span>they have the American Bureau of Shipping as the main submersible classifyer.</span></div><div style="color:rgb(0, 0, 0);font-size:13px;font-family:HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;background-color:transparent;font-style:normal;"><span>Alan</span></div><div><br clear="none"></div> <div style="font-family:HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:10pt;"> <div style="font-family:HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;font-size:12pt;"> <div class="yqt5738175238" id="yqt36116"><div dir="ltr"> <hr size="1"> <font size="2" face="Arial"> <b><span style="font-weight:bold;">From:</span></b> Håvard Hardy <haavard.hardy@gmail.com><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion
<personal_submersibles@psubs.org> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Monday, January 20, 2014 9:05 PM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] G.L. Propulsion & Manoeuvring Equipment<br clear="none"> </font> </div> <div class="y_msg_container"><br clear="none"><div id="yiv7345984833"><div><div dir="ltr">sorry, have to ask.. G.L rules?</div><div class="yiv7345984833gmail_extra"><br clear="none"><br clear="none"><div class="yiv7345984833gmail_quote">2014/1/20 Alan James <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:alanlindsayjames@yahoo.com" target="_blank" href="javascript:return">alanlindsayjames@yahoo.com</a>></span><br clear="none">
<blockquote class="yiv7345984833gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="yiv7345984833yqt4024830371" id="yiv7345984833yqt10495"><div><div style="font-size:10pt;font-family:HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;"><div>
This is section 10 of 15. We are slowly getting there.</div><div><span style="font-size:10pt;"> In addition to the following rules, the propulsion & steering systems are subject to G.L. rules for</span></div><div>machinery installations & the rudders to G.L. rules on hull structures.</div>
<div> The motors are to be designed to be used continuously.</div><div> Propellers need shielding.</div><div> Electronic motor controllers shouldn't fail so the motor continues running, & the motors need to </div>
<div>be capable of manual control.</div><div> The propulsion equipment needs to be fitted with indicators & alarms to guarantee safe operation.</div><div> Effective reverse thrust for braking has to
be provided.</div><div> The stress in the rudder stock can't exceed .5 of the yield stress.</div><div> Independent submersibles (operated off shore without support ship), need to be equipped with</div><div>auxiliary steering gear (bit foggy about what this means)</div>
<div> The steering gear needs to be able to move the rudder from 35 degrees one side to 30 degrees the other</div><div>within 28 seconds (how's that for nit picking)</div><div> If horizontal rudders are a necessity on your sub, they need to have an alternative power supply that can</div>
<div>be operated from the control stand. The "slewing" movements of motors used for maneuvering are also subject</div><div>to the above requirement.</div><div> There needs to be rudder position indicators & indicators to signal any failure of the steering gear.</div>
<div> There are rules for dynamic positioning that are required for
some operations, but probably don't concern us</div><div>& their equipment is examined on a case by case basis.</div><div>Regards Alan</div><div><br clear="none"></div><div><br clear="none"></div><div> </div><div><br clear="none"></div><div> </div><div>
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