<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>Sean, When I started this project I did a bit of research on how sand goes thru an hour glass. I managed to find a fairly detailed study on the physics of the whole thing. One priority is that the balls are in fact round and assuming they are then as it turns out you need to have a ratio of 5 to 1 , 1, being the diameter of the balls and 5 being the diameter of the hole that they will be going thru. So my hole is in fact 5" in diameter and with it open there is absolutely no way the balls can get lodged some how and not come out. To be sure I couldn't explain physics behind it but I think it has to do with the coefficient of friction between the balls encompassing the open 5" hole. I will keep testing as I make more lead balls. The hopper can holed a lot more than what I just tested.</DIV><DIV> </DIV><DIV>Brian <BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: "Sean T. Stevenson via Personal_Submersibles" <personal_submersibles@psubs.org><BR>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><BR>Subject: Re: [PSUBS-MAILIST] Pin Ball Wizard<BR>Date: Sun, 04 Dec 2016 15:21:50 -0700<BR><BR></DIV><P dir="ltr">Brian - is there any concern about the balls packing in tight due to vibration over time and not releasing?</P></DIV>
<P dir="ltr">Sean<BR>
<BR><BR><DIV>On December 4, 2016 1:52:27 PM MST, Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<BLOCKQUOTE style="margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;">
<DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Hi All,</DIV><DIV> My drop hopper works like a charm ! I just successfully dropped about 130 lbs of lead balls. One nice thing about it is that the disk stopper, that prevents the balls from falling out, doesn't really see the total weight of the balls that are in the hopper. Most of the weight get distributed to the spherical hopper wall, so there is not the stress on the turning screw. The turning screw is Acme stainless thread ( 3/4") , actually what turns is the screw and the short piece of thread is what is attached to the disk holding plate which falls out. It was a trip pouring all these balls into the hopper ! I need to have somebody inside releasing so I can observe next
time! </DIV><DIV> </DIV><DIV> </DIV><DIV>Cheers, </DIV><DIV> </DIV><DIV>Brian</DIV></DIV></BLOCKQUOTE></DIV></P><P style="margin-top: 2.5em; margin-bottom: 1em; border-bottom-color: rgb(0, 0, 0); border-bottom-width: 1px; border-bottom-style: solid;"><PRE></PRE></P><HR><BR>Personal_Submersibles mailing list<BR>Personal_Submersibles@psubs.org<BR><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A><BR>_______________________________________________
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