<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:14pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">Jon,</SPAN></div>
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<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; COLOR: rgb(0,0,0); FONT-SIZE: 19px; RIGHT: auto"><SPAN style="RIGHT: auto">The geometry is not in question if one uses the 3d printer (or some other machine process) to form the nozzle, it will be a perfect foil for that $760. I still need those dimensions to finalize a kort design for anyone who wants one. When thats done, I'll forward you the CAD files needed so members can download from the PSUB site to submit to a vendor of choice.</SPAN></div>
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<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; COLOR: rgb(0,0,0); FONT-SIZE: 19px; RIGHT: auto"><SPAN style="RIGHT: auto">The kort nozzle itself is simple to do CAD wise, its a revolve command of the foil section around the axis. Im working on the supports today.</SPAN></div>
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<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; COLOR: rgb(0,0,0); FONT-SIZE: 19px; RIGHT: auto"><SPAN style="RIGHT: auto">As for other projects for me, Ill look and see where, what, and when I can contribute depending on what ideas are thrown about and viable. All of this helps me when it comes time to do my own build.</SPAN></div>
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<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; COLOR: rgb(0,0,0); FONT-SIZE: 19px; RIGHT: auto"><SPAN style="RIGHT: auto">Joe</SPAN></div>
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<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><FONT size=2 face=Arial><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Jon Wallace <jonw@psubs.org><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> Monday, October 28, 2013 11:16 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [PSUBS-MAILIST] Kort Nozzle<BR></FONT></DIV>
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<DIV class=yiv6561143798moz-cite-prefix><BR clear=none>Hi Joe,<BR clear=none><BR clear=none>There are a number of enhancements that have been discussed by members building K-350's. We'd have to collect those and see what you were comfortable with committing to. Scott Waters had a list of enhancements/changes that he recommended as part of his presentation in Islamorada. He can probably communicate those or I can look them up from his slides. James Frankland is another person whom had suggestions for vessel improvements. I'll see if I can get a list together and then you can decide if you want to invest time in them. <BR clear=none><BR clear=none>In regards to the kort nozzle, I believe the design geometry required to produce the thrust enhancement that has been discussed in this thread will not survive a hand lapped FRP approach. Like an airfoil, any deviation from the design will
reduce efficiency. Enough deviation and you've spent a lot of time and money on nothing more than a glorified prop guard. It would make sense to include as part of the kort project some means of testing the efficiency of the actual product so we could determine the effectiveness of various production methods.<BR clear=none><BR clear=none>Jon<BR clear=none><BR clear=none>
<DIV id=yiv6561143798yqtfd07631 class=yiv6561143798yqt1873552110><BR clear=none>On 10/27/2013 9:33 PM, Joe Perkel wrote:<BR clear=none></DIV></DIV>
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<DIV>Jon,<BR clear=none><BR clear=none>The short answer is I dont know. But look at that Dutchman and his simplistic ingenuity. Thats what Im hoping for out of this group as far as materials and processes. Im ready to draw up whatever the result. Consider that there are intrepid builders of all sorts of things worldwide. Hovercrafters build large scale ducts for thier craft as a example. I'll take a look there tomorrow.</DIV>
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<DIV>How about half a kort??? A plug of some kind (<I>construction grade foam perhaps</I>?) to build up a FRP shell over then mate two halves Revelle model style??? Can this shape be hot wired?? What to use as a guide? I have ideas and questions, but I need the shop wizards of the world to come up with the process.</DIV>
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<DIV>As for The other things, Im ready and willing. I like the thruster because with my family and work time constraints, its not too much to chew on. I can commit to small projects for now, bigger later as time goes on.</DIV>
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<DIV>What would you like to see done apart from the thrusters?</DIV>
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<DIV>Joe</DIV></TD></TR></TBODY></TABLE>
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