<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div><span>Vance,</span></div><div><span>Funny you mention the inner tube. I did just that as an experiment on my red sphere sub. I even painted the inner tube white so it would blend in better. </span></div><div><span>I took a big leap of faith this morning, I just finished machining the prop shaft bushing housing. The housing has a bearing and seals now. I drilled in two ports (1/8 pipe) to fill and drain the oil. I like it much better and I have to drain the oil regularly in the second shaft housing anyways. </span></div><div><span>I also decided to buy a new motor instead of using the original. I am driving to the USA tomorrow to pick it up. That was my Christmas present. :-) I am very easy to shop for
:-)</span></div><div><span>Hank </span></div><div class="yahoo_quoted" style="display: block;"> <br> <br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> On Thursday, December 5, 2013 10:47:14 AM, "vbra676539@aol.com" <vbra676539@aol.com> wrote:<br> </font> </div> <div class="y_msg_container"><div id="yiv5759680776"><div><font color="black" face="Arial, Helvetica, sans-serif" size="3"><font class="yiv5759680776Apple-style-span" size="3">Which suggests a big inner tube if you want to convert a DW2000 to that definition. Otherwise, keep the door shut, or prepare to swim.</font>
</font><div><font class="yiv5759680776Apple-style-span" size="3">Vance<br clear="none">
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<div style="color: black; font-family: helvetica, arial; font-size: 10pt;">-----Original Message-----<br clear="none">
From: Phil Nuytten <phil@philnuytten.com><br clear="none">
To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><br clear="none">
Sent: Thu, Dec 5, 2013 11:11 am<br clear="none">
Subject: Re: [PSUBS-MAILIST] G.L. Summary Stability & Buoyancy<br clear="none">
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<div>The minimum hatch to waterline measure applies to those submersibles
‘intended to be entered while afloat’ - </div>
<div>Phil</div>
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<div style="background: rgb(245, 245, 245);">
<div><b>From:</b> <a title="jonw@psubs.org" href="mailto:jonw@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:jonw@psubs.org">Jon Wallace</a> </div>
<div><b>Sent:</b> Thursday, December 05, 2013 7:33 AM</div>
<div><b>To:</b> <a title="personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">Personal Submersibles General
Discussion</a> </div>
<div><b>Subject:</b> Re: [PSUBS-MAILIST] G.L. Summary Stability &
Buoyancy</div>
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I think the first sentence is key, "Submersibles
will be assigned Class only after it has been demonstrated that their buoyancy
and their static and dynamic stability in in tact condition is adequate FOR THE
SERVICE INTENDED". Some of the lack of specificity is because they can't
conceive of every possible application. They do however have quite a few
specifics as you outlined. Some of the testing won't apply (ie fuel load)
and it's possible that a narrow scope of service might lower number of tests
required.<br clear="none">
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On 12/5/2013 4:08 AM, Alan James wrote:<br clear="none">
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<div id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502"> </div>
<div id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502">I'm afraid there is
nothing simple in this section. It is lacking in a lot of specifics.</div>
<div id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502">There are statements
such as "shall generally meet the standard defined</div>
<div id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502">in the following
unless special operational restrictions reflected in the class</div>
<div id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502">notification allow a
lower level. & ...Depending on the type of submersible & the </div>
<div id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502">operation area, the
distance between the waterline in fully surfaced condition</div>
<div id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502">and the upper edge of
entrance openings, air pipes,etc. which may be open</div>
<div id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502">for surfaced
operation, has to be approved by G.L.</div>
<div id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502"> ABS has
a minimum distance from the waterline to the hatch opening of 30"</div>
<div id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502">whereas G.L. states;
<span style="font-size: 14pt;">For surfaced; </span><span id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_3357" style="font-size: 14pt;">a
minimum </span><span id="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2486" style="font-size: 14pt; background-color: transparent;">distance between
metacentric height & center of gravity </span><span id="yiv5759680776yui_3_13_0_ym1_7_1386063901473_17" style="font-size: 14pt; background-color: transparent;">of 10cm. (4")
</span><span id="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2596" style="font-size: 14pt; background-color: transparent;">And for submerged, a
minimum distance between center of buoyancy </span><span id="yiv5759680776yui_3_13_0_ym1_7_1386063901473_21" style="font-size: 14pt; background-color: transparent;">& center
</span><span id="yiv5759680776yui_3_13_0_ym1_1_1386065276172_2496" style="font-size: 14pt; background-color: transparent;">of gravity of 5cm (2")
(same as ABS). At no stage will G be above B. (including after dropping the
drop weight)</span></div>
<div class="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2370 yiv5759680776yui_3_13_0_ym1_1_1386065276172_2405 yiv5759680776yui_3_13_0_ym1_1_1386136859721_2414" id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502" style='color: rgb(0, 0, 0); font-family: helveticaneue, "Helvetica Neue", helvetica, arial, "Lucida Grande", sans-serif; font-size: 14pt; font-style: normal; background-color: transparent;'><span id="yiv5759680776yui_3_13_0_ym1_7_1386061802447_54" style="font-size: 14pt;">In
the initial paper work sent before construction, a detailed analyses of
stability is to</span></div>
<div class="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2370 yiv5759680776yui_3_13_0_ym1_1_1386065276172_2405 yiv5759680776yui_3_13_0_ym1_1_1386136859721_2416" id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502" style='color: rgb(0, 0, 0); font-family: helveticaneue, "Helvetica Neue", helvetica, arial, "Lucida Grande", sans-serif; font-size: 14pt; font-style: normal; background-color: transparent;'><span id="yiv5759680776yui_3_13_0_ym1_7_1386065276172_24" style="font-size: 14pt;">be
</span><span id="yiv5759680776yui_3_13_0_ym1_1_1386065276172_3315" style="font-size: 14pt; background-color: transparent;">included. This
takes the form of analyzing the heeling levers of 10 different load cases in
fresh & salt water, 6 </span><span style="font-size: 14pt; background-color: transparent;">on the surface & 4
submerged & at 6 different heeling</span></div>
<div class="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2370 yiv5759680776yui_3_13_0_ym1_1_1386065276172_2405 yiv5759680776yui_3_13_0_ym1_1_1386136859721_2416 yiv5759680776yui_3_13_0_ym1_1_1386231496534_2369" id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502" style='color: rgb(0, 0, 0); font-family: helveticaneue, "Helvetica Neue", helvetica, arial, "Lucida Grande", sans-serif; font-size: 14pt; font-style: normal; background-color: transparent;'><span style="font-size: 14pt; background-color: transparent;">angles. So looks like
120 calculations. </span><span style="font-size: 14pt; background-color: transparent;">Heeling forces from
free liquid surfaces, turning circles, wind, ice loads, transference
</span><span style="font-size: 14pt; background-color: transparent;">of
equipment & personal & payloads from working devices have to be
considered.</span></div>
<div class="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2370 yiv5759680776yui_3_13_0_ym1_1_1386065276172_2405 yiv5759680776yui_3_13_0_ym1_1_1386136859721_2416 yiv5759680776yui_3_13_0_ym1_1_1386231496534_2369" id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502" style='color: rgb(0, 0, 0); font-family: helveticaneue, "Helvetica Neue", helvetica, arial, "Lucida Grande", sans-serif; font-size: 14pt; font-style: normal; background-color: transparent;'><span style="font-size: 14pt; background-color: transparent;">There needs to be
sufficient ballast to keep a minimum of 10% of the pressure</span></div>
<div class="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2370 yiv5759680776yui_3_13_0_ym1_1_1386065276172_2405 yiv5759680776yui_3_13_0_ym1_1_1386136859721_2416 yiv5759680776yui_3_13_0_ym1_1_1386231496534_2369" id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502" style='color: rgb(0, 0, 0); font-family: helveticaneue, "Helvetica Neue", helvetica, arial, "Lucida Grande", sans-serif; font-size: 14pt; font-style: normal; background-color: transparent;'><span style="font-size: 14pt; background-color: transparent;">hull out of the water.
The draught line has to be marked on the hull. </span></div>
<div class="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2370 yiv5759680776yui_3_13_0_ym1_1_1386065276172_2405 yiv5759680776yui_3_13_0_ym1_1_1386136859721_2416 yiv5759680776yui_3_13_0_ym1_1_1386231496534_2369" id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502" style='color: rgb(0, 0, 0); font-family: helveticaneue, "Helvetica Neue", helvetica, arial, "Lucida Grande", sans-serif; font-size: 14pt; font-style: normal; background-color: transparent;'><span style="font-size: 14pt; background-color: transparent;">When one major ballast
tank is damaged the hatch has to be able to open without</span></div>
<div class="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2370 yiv5759680776yui_3_13_0_ym1_1_1386065276172_2405 yiv5759680776yui_3_13_0_ym1_1_1386136859721_2416 yiv5759680776yui_3_13_0_ym1_1_1386231496534_2369" id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502" style='color: rgb(0, 0, 0); font-family: helveticaneue, "Helvetica Neue", helvetica, arial, "Lucida Grande", sans-serif; font-size: 14pt; font-style: normal; background-color: transparent;'><span style="font-size: 14pt; background-color: transparent;">water coming in &
the heeling angle shouldn't exceed 22,5 degrees.</span></div>
<div class="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2370 yiv5759680776yui_3_13_0_ym1_1_1386065276172_2405 yiv5759680776yui_3_13_0_ym1_1_1386136859721_2416 yiv5759680776yui_3_13_0_ym1_1_1386231496534_2369" id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502" style='color: rgb(0, 0, 0); font-family: helveticaneue, "Helvetica Neue", helvetica, arial, "Lucida Grande", sans-serif; font-size: 14pt; font-style: normal; background-color: transparent;'><span style="font-size: 14pt; background-color: transparent;">There is an operational
in water test at the end of construction with evaluation</span></div>
<div class="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2370 yiv5759680776yui_3_13_0_ym1_1_1386065276172_2405 yiv5759680776yui_3_13_0_ym1_1_1386136859721_2416 yiv5759680776yui_3_13_0_ym1_1_1386231496534_2369" id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502" style='color: rgb(0, 0, 0); font-family: helveticaneue, "Helvetica Neue", helvetica, arial, "Lucida Grande", sans-serif; font-size: 14pt; font-style: normal; background-color: transparent;'><span style="font-size: 14pt; background-color: transparent;">of the center of
gravity upon which the pre build calculations were based.</span></div>
<div class="yiv5759680776yui_3_13_0_ym1_1_1386063901473_2370 yiv5759680776yui_3_13_0_ym1_1_1386065276172_2405 yiv5759680776yui_3_13_0_ym1_1_1386136859721_2416 yiv5759680776yui_3_13_0_ym1_1_1386231496534_2369" id="yiv5759680776yui_3_13_0_ym1_1_1386061802447_2502" style='color: rgb(0, 0, 0); font-family: helveticaneue, "Helvetica Neue", helvetica, arial, "Lucida Grande", sans-serif; font-size: 14pt; font-style: normal; background-color: transparent;'><span style="font-size: 14pt; background-color: transparent;">Alan</span></div>
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