<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix"><br>
Advantage: ABS<br>
<br>
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>
<br>
Jon<br>
<br>
<br>
On 12/11/2013 4:17 PM, Alan James wrote:<br>
</div>
<blockquote
cite="mid:1386796655.18459.YahooMailNeo@web141201.mail.bf1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff;
font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial,
Lucida Grande, sans-serif;font-size:14pt">
<div><span>Hi Doug,</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>Elaborating on your
idea.</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>If you had digital
pressure gauges you could have a system</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>comparing the voltage
of the two, & when they were in a </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>similar range they
would activate or deactivate an electromagnet</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 pulled back a
latch that was impeding the movement of the hatch</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>release mechanism.
(car door lock mechanism) You would</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>need a manual
over-ride. Any electronics nerd could do this easily</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>& the car lock
mechanisms I've seen for round $20-</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
style="background-color: transparent;">With the
over-pressure valve set at a couple of psi you know</span><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>that on the surface
the most over pressure there could be is</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>what your
over-pressure valve is set at. Under-pressure is</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>not such an issue as
you won't be able to physically open the hatch </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>if the under pressure
is too much, & hence you have to equalize.</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>So I don't think it
needs sophisticated monitoring. </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'm not sure how much
of an issue it would be if you opened your</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>hatch with a couple of
psi over-pressure. Would the dome fly</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>open at 90 miles an
hour, or would pressure be released incrementally</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>as the hatch dogs
unlatched before fully releasing.</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>Obviously G.L. thinks
this is an issue.</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>
<br>
</div>
</blockquote>
<br>
</body>
</html>