<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>Alan,</DIV><DIV> I was thinking get a small electric water heater ( 5 gal) fill it with glycol and circulate it though a large open reservoir that has an opening at the top. Make a special sealed container that the viewport could be housed in and dump it into the pot. Then regulate the temperature of the water/glycol fluid using a cooling radiator and flow valves to channel more or less water through the cooling fan. Have everything on variable solenoid valves. Hook it up to your computer and control everything from there.</DIV><DIV> </DIV><DIV>Brian <BR><BR>--- alanlindsayjames@yahoo.com wrote:<BR><BR>From: Alan <alanlindsayjames@yahoo.com><BR>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><BR>Subject: Re: [PSUBS-MAILIST] annealing acrylic<BR>Date: Wed, 2 Apr 2014 07:02:51 +1300<BR><BR></DIV><DIV>Brian,</DIV><DIV>I was going to suggest earlier that you build a larger oven next to your small</DIV><DIV>oven & use the small oven to heat it. That way the temperature fluctuations</DIV><DIV>would be less dramatic. Possibly make it out of insulation batts & aluminium foil.</DIV><DIV>you could still use the control unit I suggested. </DIV><DIV>Alan<BR><BR>Sent from my iPad</DIV><DIV><BR>On 2/04/2014, at 3:49 am, "Brian Cox" <<A href="mailto:brian@ojaivalleybeefarm.com">brian@ojaivalleybeefarm.com</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Epic Fail ! my attempt to anneal a viewport did not go well. The temps swings were so great that it was impossible to regulate. The mass in the oven that I had hoped would moderate the swings made it so the lag time between the heating cycle and when the thermometer sensor saw the temperature change uncontrollable. And the heat was not even though out the oven as well.</DIV><DIV> </DIV><DIV>Brian<BR><BR>--- <A href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</A> wrote:<BR><BR>From: hank pronk <<A href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</A>><BR>To: Personal Submersibles General Discussion <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR>Subject: Re: [PSUBS-MAILIST] annealing acrylic<BR>Date: Tue, 25 Mar 2014 05:35:51 -0700 (PDT)<BR><BR></DIV><DIV style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255);"><DIV><SPAN>Brian,</SPAN></DIV><DIV><SPAN>I say when in doubt, test. If your not building a test chamber , you can make your sample window to fit my chamber and I will test it for you.</SPAN></DIV><DIV><SPAN>Hank</SPAN></DIV><DIV 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 Monday, March 24, 2014 7:23:18 PM, Brian Cox <<A href="mailto:brian@ojaivalleybeefarm.com">brian@ojaivalleybeefarm.com</A>> wrote:<BR> </FONT> </DIV> <DIV><DIV><DIV><DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Hank,</DIV><DIV> I have the book, that's where the annealing schedules are, they vary quite a bit, there is an absolute minimum time and then there is the original recommended time. The recommended time comes out to be around 51 hours where as the shortened time is maybe half that. I'm just doing one test piece to start off with. I was also using the same oven ( a toaster oven I got from Sears for $75 bucks) to heat the welding rod to 250 degrees F before we used the rod ( it had been sitting out for a few days). I was able to keep the temperature fairly even for the welding rod at 250. </DIV><DIV> </DIV><DIV>Brian <BR><BR>--- <A href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</A> wrote:<BR><BR>From: hank pronk <<A href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</A>><BR>To: Personal Submersibles General Discussion
<<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR>Subject: Re: [PSUBS-MAILIST] annealing acrylic<BR>Date: Mon, 24 Mar 2014 17:39:27 -0700 (PDT)<BR><BR></DIV><DIV><DIV style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255);"><DIV><SPAN>Brian,</SPAN></DIV><DIV><SPAN>Do you have the Stachiw book of Acrylics, I can send you mine if you don't have a copy. There is some pretty important stuff in there.</SPAN></DIV><DIV><SPAN>Hank</SPAN></DIV><DIV 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 , hank pronk <<A href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</A>> wrote:<BR> </FONT> </DIV> <DIV><DIV><DIV><DIV style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255);"><DIV><SPAN>Brian,</SPAN></DIV><DIV><SPAN>How thick is your acrylic? should take more than a night?</SPAN></DIV><DIV><SPAN>Hank</SPAN></DIV><DIV 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><DIV dir="ltr"> <FONT face="Arial" size="2"> On Monday, March 24, 2014 6:33:09 PM, Brian Cox <<A href="mailto:brian@ojaivalleybeefarm.com">brian@ojaivalleybeefarm.com</A>> wrote:<BR> </FONT> </DIV>
<DIV><DIV><DIV><DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Yes, I have the annealing
schedules. I have an electric oven and two
digital thermometers, one I'm going to put in a piece of acrylic and the other one I'm going to use to monitor the oven temperature itself . I'm worried that the thermometer in the acrylic won't register until it gets heated throughout, and so then the oven temp might go higher than it should. So between the two readouts I can heat it gradually up. It'll be a long night.</DIV><DIV> </DIV><DIV>Brian<BR><BR>--- <A href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</A> wrote:<BR><BR>From: hank pronk <<A href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</A>><BR>To: Personal Submersibles General Discussion <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR>Subject: Re: [PSUBS-MAILIST] annealing acrylic<BR>Date: Mon, 24 Mar 2014 17:22:32 -0700 (PDT)<BR><BR></DIV><DIV><DIV style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255);"><DIV><SPAN>Brian,</SPAN></DIV><DIV><SPAN>Are you going to anneal your windows yourself? </SPAN></DIV><DIV><SPAN>Hank </SPAN></DIV><DIV 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 Monday, March 24, 2014 6:03:10 PM, Brian Cox <<A href="mailto:brian@ojaivalleybeefarm.com">brian@ojaivalleybeefarm.com</A>> wrote:<BR> </FONT> </DIV> <DIV><DIV><DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Used my polarized lenses on the newly cut piece and it appears clouded
throughout the whole piece. Where as another piece I have, you can clearly see a stress area around where it has been drilled. </DIV><DIV> </DIV><DIV>Brian</DIV><DIV> </DIV><DIV><BR>--- <A href="mailto:emile@airesearch.nl">emile@airesearch.nl</A> wrote:<BR><BR>From: "Emile van Essen" <<A href="mailto:emile@airesearch.nl">emile@airesearch.nl</A>><BR>To: "'Personal Submersibles General Discussion'" <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR>Subject: Re: [PSUBS-MAILIST] annealing acrylic<BR>Date: Mon, 24 Mar 2014 22:40:46 +0100<BR><BR>
</DIV><DIV>
<DIV><FONT color="navy" face="Arial" size="2"><SPAN lang="EN-GB" style="color: navy; font-family: Arial; font-size: 10pt;">As far as I know it is
only cast.</SPAN></FONT></DIV></DIV>
<DIV><FONT color="navy" face="Arial" size="2"><SPAN lang="EN-GB" style="color: navy; font-family: Arial; font-size: 10pt;"></SPAN></FONT> </DIV></DIV>
<DIV><FONT color="navy" face="Arial" size="2"><SPAN lang="EN-GB" style="color: navy; font-family: Arial; font-size: 10pt;">Regards, Emile</SPAN></FONT>
</DIV><DIV><FONT color="navy" face="Arial" size="2"><SPAN lang="EN-GB" style="color: navy; font-family: Arial; font-size: 10pt;"></SPAN></FONT>
<DIV>
<DIV align="center" style="text-align: center;"><FONT face="Times New Roman" size="3"><SPAN style="font-size: 12pt;">
</SPAN></FONT><DIV style="margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204, 204); height: 0px; line-height: 0; font-size: 0px; border-image: none;"></DIV>
</DIV>
</DIV><DIV><B><FONT face="Tahoma" size="2"><SPAN style="font-family: Tahoma; font-size: 10pt; font-weight: bold;">Van:</SPAN></FONT></B><FONT face="Tahoma" size="2"><SPAN style="font-family: Tahoma; font-size: 10pt;">
Personal_Submersibles [<A href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</A>] <B><SPAN style="font-weight: bold;">Namens </SPAN></B>Brian Cox<BR>
<B><SPAN style="font-weight: bold;">Verzonden:</SPAN></B> maandag 24 maart 2014
20:37<BR>
<B><SPAN style="font-weight: bold;">Aan:</SPAN></B> PSubs <BR>
<B><SPAN style="font-weight: bold;">Onderwerp:</SPAN></B> [PSUBS-MAILIST]
annealing acrylic</SPAN></FONT><DIV></DIV>
<DIV><FONT face="Times New Roman" size="3"><SPAN style="font-size: 12pt;"></SPAN></FONT>
<DIV>
<DIV>
</DIV></DIV><DIV><FONT face="Arial" size="2"><SPAN style="font-family: Arial; font-size: 10pt;">I'm planning on annealing my viewports, does anyone
know if the acrylic from the factory is pre-shrunk ?</SPAN></FONT>
<DIV>
</DIV><DIV><FONT face="Arial" size="2"><SPAN style="font-family: Arial; font-size: 10pt;"></SPAN></FONT>
<DIV>
</DIV><DIV><FONT face="Arial" size="2"><SPAN style="font-family: Arial; font-size: 10pt;">Brian</SPAN></FONT>
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