<html><head></head><body><p dir="ltr">It will be similar to a surface vessel bow thruster, only instead of a thruster tunnel in a hull, it will be housed in a symmetric nozzle which itself can be vectored with an actuator. I'm designing the gearbox from scratch - a few off-the-shelf spiral miter gears, tapered roller combined load bearings, shafts, seals and ports for oil circulation. Not sure what you mean by autorotate? They will not freewheel, if that's what you mean. Zero output on the hydraulic servovalve will lock off fluid flow (and thus lock out motion), although the gearbox will still be pressure compensated from the discharge side.</p>
<p dir="ltr">Sean</p>
<br><br><div class="gmail_quote">On March 25, 2016 3:59:31 PM MDT, hank pronk 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;">
<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_ym18_1_1458943066308_3543">Hi Sean,</div><div id="yui_3_16_0_ym18_1_1458943066308_3543" dir="ltr">It sounds like you are going for something like a hydraulic bow thruster, I am not sure if the props autorotate.</div><div id="yui_3_16_0_ym18_1_1458943066308_3543" dir="ltr">Hank</div></div><p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />Personal_Submersibles mailing list<br />Personal_Submersibles@psubs.org<br /><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br /></pre></blockquote></div></body></html>