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Greeting Doug, No more slacking for you. You've got your work cut out for ya. Send me some models so I can see where your at. You make a good point about the plunger sealing properly. I plan to use a soft large O-ring to help with minor issues, and even have a double O-ring configuration, as one might expect from me. But I have been thinking that the upper attachment point should be double adjustable ( up/down and forward/back) so I can more easily a line the plunger. A SS cam insert that I can lock down some how might also do the trick. I currently am using three nylon washers per connection point for the arm to move on, and a lockable castle nut. It would be easier for me to not use the castle nut, and just use a SS nut with the nylon locking means instead. I think it would take ages for the SS bolts and the parts they hold on to wear out, when considering the small amount of rotation they will have. But one could drill a over sized hole in both SS plate parts and insert a nylon tube spacer for the bolt shaft to ride on, and if that got worn out it would be a easy fix to just replace it. Regards, Szybowski To: personal_submersibles@psubs.org Subject: Re: [PSUBS-MAILIST] Mushroom Vent CAD Assembly Options Date: Fri, 9 Jan 2009 22:33:28 -0500 From: djackson99@aol.com Hey Brent
Nice usage of Solidworks. I may be missing something in the use or material but it seems to me that if the hinge point on the hull were to wear or not be accurately fit then the side of the hatch toward the hull might open. On the other hand if the actuator were fixed to the center of the hatch and the hatch had a slightly flexable mount to the hinge, then the actuator would exert even presure on all edges of the hatch. Now that I'm inspired I need to go practice more SW. Best of Luck Doug www.SubmarineBoat.com From: Brent Hartwig <brenthartwig@hotmail.com> To: PSUBSorg <personal_submersibles@psubs.org> Sent: Fri, 9 Jan 2009 7:35 pm Subject: [PSUBS-MAILIST] Mushroom Vent CAD Assembly Options Greetings SMMOMs, I've been working on a number of different ways to configure my version of a Mushroom vent for the front and rear MBT's on my K-250. This is the one I like the best so far. http://cid-5085d10eb6afe47c.skydrive.live.com/browse.aspx/Plunger%20Assembly http://cid-5085d10eb6afe47c.skydrive.live.com/browse.aspx/Mushroom%20Vent%20Concept%20Main%20Assembly It's mostly made up of 1/4" X 1" 316 SS bar stock, and 1" thick black UHMW. So the goal is for it to be easy and affordable to make and assemble. I made a mock up of the single line, spring loaded pneumatic cylinder Vance was talking about, which I would like to use in this assembly. I will need to trim away some material on the plunger land, and the piece cut out when I made the whole in the FRP MBT, that meets the bottom of the FRP MBT, and then attach them with Seka flex and SS screws. This way I can have a clean look on the top area of the MBT's, and the angle I have to mount the vent on aids in letting almost all the air out. The very small air pockets left I'm thinking will not be an issue. I thought mounting the vent this way would be better for my application, since the knuckle curvature of the heads and the high point of the MBT's are in the same area. I'm interested in your guys thoughts on this concept design. I've uploaded three screen capture clips of the assembly animated on Youtube. The quality is not that great on Youtube, so if anyone would like better quality versions of these clips, let me know off list and I'll send them to you. http://www.youtube.com/watch?v=YvIc3qRRgv8&feature=channel_page http://www.youtube.com/watch?v=S6D0iMgqgzk&feature=channel http://www.youtube.com/watch?v=tdBap4iVoGQ&feature=channel Regards, Szybowski = |