<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:14pt"><div><span>If you have an over-pressure valve handle obstructing the </span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>movement of the hatch latch handle, it would need to be</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>spring loaded or you would create the problem of the possibility</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida
Grande', sans-serif; background-color: transparent; font-style: normal;"><span>of diving with the valve open later on.</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>With the G.L. qualification I mentioned of having 2 shut off valves,</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>I guess you could put the shut off valve at the hull & the over-pressure </span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>valve
anywhere on a line coming from it, & use it additionally as the </span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>equalization valve. Possibly then place the over-pressure valve some how</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span> that it could be plunged as the latch handle was moved.</span></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>Alan</span></div><div style="color: rgb(0, 0, 0); font-size:
18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 18.88888931274414px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span><br></span></div><div><br></div> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 14pt;"> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font size="2" face="Arial"> <b><span style="font-weight:bold;">From:</span></b> "MerlinSub@t-online.de" <MerlinSub@t-online.de><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion
<personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, December 12, 2013 11:05 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] G.L. summary Pressure Hull<br> </font> </div> <div class="y_msg_container"><br><div id="yiv0818225288"><title>E-Mail Software 6.0</title><div><font face="Courier New" size="2">I am pretty sure GL and the other
classes like a hatch, OP, AOP solution<br clear="none">without electronics a lot
more. </font> <br clear="none"><br clear="none">On Euronaut there is a manual ballvale as
Overpressure valve integrate in the hatch<br clear="none">and a red label on the hatch handle
"Never open before equalize". <br clear="none"><br clear="none">Its not with the rule because we assume
the operator is able to read a red label - but for us it works. <br clear="none"><br clear="none"> In
case I had to build something with the rules I just will block with the
ballvalve handle in close position <br clear="none">the hatch handle or the latches.
<br clear="none"><br clear="none">Another way could be to design the hatch latches that way on a tread
handle <br clear="none">that you have to turn the whell some turns and it gives the hatches
only a litte opening to equalize <br clear="none">and gives the latches later
complete free with more turns. <br clear="none">In that way you can open the hatch very
fast in case in the batterey get very hot below your feets.. <br clear="none">And you can
still blow your ears drums away in case you like that.. <br clear="none"><br clear="none">vbr
Carsten<br clear="none">
<br clear="none">
<br clear="none">"Jon Wallace" <jonw@psubs.org> schrieb:
<div class="yiv0818225288yqt2957037969" id="yiv0818225288yqt83730"><blockquote style="PADDING-RIGHT:0px;PADDING-LEFT:5px;MARGIN-LEFT:5px;BORDER-LEFT:#000000 2px solid;MARGIN-RIGHT:0px;">
<div class="yiv0818225288moz-cite-prefix"><br clear="none">
Advantage: ABS<br clear="none">
<br clear="none">
I think the sentence being scrutinized may perhaps just be badly
worded. With the exception of some intricate mechanism that
equalizes as part of a sequence to open the hatch as Jim
suggested, I don't see a way to comply with the requirement
without the involvement of electronics. Philosophically I don't
think I want to rely on an electromagnet or boolean logic giving
me permission to exit the vessel. If Jim's mechanism turns out to
be to complicated then Doug's concern is valid...remember Apollo
1.<br clear="none">
<br clear="none">
Jon<br clear="none">
<br clear="none">
<br clear="none">
On 12/11/2013 4:17 PM, Alan James wrote:<br clear="none">
</div>
<blockquote type="cite">
<div style="font-size: 14pt; color: rgb(0, 0, 0); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: rgb(255, 255, 255);">
<div><span>Hi Doug,</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>Elaborating on your
idea.</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>If you had digital
pressure gauges you could have a system</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>comparing the voltage
of the two, & when they were in a </span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>similar range they
would activate or deactivate an electromagnet</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>that pulled back a
latch that was impeding the movement of the hatch</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>release mechanism.
(car door lock mechanism) You would</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>need a manual
over-ride. Any electronics nerd could do this easily</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>& the car lock
mechanisms I've seen for round $20-</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span style="BACKGROUND-COLOR:transparent;">With the
over-pressure valve set at a couple of psi you know</span><br clear="none">
</div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>that on the surface
the most over pressure there could be is</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>what your
over-pressure valve is set at. Under-pressure is</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>not such an issue as
you won't be able to physically open the hatch </span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>if the under pressure
is too much, & hence you have to equalize.</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>So I don't think it
needs sophisticated monitoring. </span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>I'm not sure how much
of an issue it would be if you opened your</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>hatch with a couple of
psi over-pressure. Would the dome fly</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>open at 90 miles an
hour, or would pressure be released incrementally</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>as the hatch dogs
unlatched before fully releasing.</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>Obviously G.L. thinks
this is an issue.</span></div>
<div style="font-size: 18px; color: rgb(0, 0, 0); font-style: normal; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent;"><span>Alan</span></div>
<br clear="none">
</div>
</blockquote>
<br clear="none">
</blockquote></div>
<font face="Courier New" size="2"> </font><font face="Courier New" size="2"><br clear="none"><br clear="none">-- <br clear="none"><br clear="none">Carsten Standfuß<br clear="none">Dipl.Ing.Schiffbau @ Meerestechnik<br clear="none">Heinrich Reck Str.12A<br clear="none">18211 Admannshagen Germany<br clear="none"><br clear="none">+49 (0) 172 8464 420<br clear="none">WWW.Euronaut.org<br clear="none">Carsten@euronaut.org</font></div></div><br><div class="yqt2957037969" id="yqt67492">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br
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