<p dir="ltr">Thanks Cliff. <br>
My very first mockup of the front pilot station was full scale. It also drove a design change from a 24" hatch to 30" diameter hatch. I found out the hard way one Sunday evening after everyone was in bed, my cell phone was on the workshop bench, and I climbed inside, a little smaller than I liked, and defianatly two small when I discovered that I could not extricate myself as I could not bend my knees. Good thing I had a drill motor within arms reach to deconstruct the hull from the inside. So I am a big believer in full scale models. </p>
<div class="gmail_quote">On Oct 8, 2017 9:51 AM, "Cliff Redus via Personal_Submersibles" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Great to see progress. My experience on small boats is this is a very important step to make sure you can get in and out of the boat and to get access to critical components. Helps bring the project to life when you can sit in the wooden mockup.</div><div><br></div><div>Keep up the good work!</div><div><br></div><div>Cliff</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Oct 7, 2017 at 1:18 AM, David Colombo via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">For that price, I'm sure hank could build a dozen of them.</p>
<div class="gmail_quote">On Oct 6, 2017 6:38 PM, "Alan via Personal_Submersibles" <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.o<wbr>rg</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="auto"><div>Found this underwater actuator.</div><div>Wouldn't dare estimate the price, but it is probably something we</div><div>could make easy enough!</div><div><a href="https://www.ultramotion.com/industries/underwater-linear-actuator/" target="_blank">https://www.ultramotion.com/in<wbr>dustries/underwater-linear-act<wbr>uator/</a></div><div>It is oil compensated & uses a brushless motor.</div><div>From the pictures, it has an enclosure near the rod end that has slots</div><div>in it. I am guessing there is a rubber bellows / bladder in there to keep</div><div>the inside of the actuator at ambient pressure & to expand & contract</div><div>to compensate for displaced oil as the piston moves in & out.</div><div> Of interest is that it is saying that the motors can be over-driven by</div><div>2-3 times due to the dissipation of the heat off the coils to the seawater</div><div>through the oil. A good argument for oil compensating rather than air.</div><div>Also being brushless the oil is not going to lift the brushes.</div><div>Alan</div><div><br></div><div><br><br>Sent from my iPad</div></div><br>______________________________<wbr>_________________<br>
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