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| ALIHISGREAT |
 Posted: 01/04/2008 6:58 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
Posts: 1123
668.86 Spud Bux
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| jackssmirkingrevenge wrote: | nothing wrong with being careful  |
well i can see this is going nowhere and we will never agree 
and now for some slightly more on topic discussion, would you be able to reinforce epoxy pycrete style and would it make a big difference to strength?
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| SPG |
| Posted: 01/04/2008 6:58 AM Post subject: |
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2nd Lieutenant
Joined: 09 Feb 2006
Posts: 236
500.93 Spud Bux
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| us sniper wrote: | | Why did you put the magazine in the valve? Why not just do it like the gun JSR just made. That would make it much less complicated to build . |
Cos his didn't work?
Although actually it's to try something different.
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| jackssmirkingrevenge |
| Posted: 01/04/2008 7:40 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 6523
9946.55 Spud Bux
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| ALIHISGREAT wrote: | | would you be able to reinforce epoxy pycrete style and would it make a big difference to strength? |
I have done this in the past by mixing wood shavings or similar filler in with the epoxy, it tends to reduce strength but if you're using it as a filler as in SPG's case you can save on a bit of epoxy.
| Quote: | | Cos his didn't work? |
Well, in the light of recent ideas and developments, perhaps it would have worked if it looked something like this?
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| ALIHISGREAT |
| Posted: 01/04/2008 7:48 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
Posts: 1123
668.86 Spud Bux
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| Quote: | I have done this in the past by mixing wood shavings or similar filler in with the epoxy, it tends to reduce strength but if you're using it as a filler as in SPG's case you can save on a bit of epoxy.
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reduces strength? thats wierd  i wonder why?
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| jackssmirkingrevenge |
| Posted: 01/04/2008 7:49 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 6523
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| It depends what tyou're using as a filler, if you use steel mesh for example then the result is stronger
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| ALIHISGREAT |
| Posted: 01/04/2008 7:52 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
Posts: 1123
668.86 Spud Bux
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| jackssmirkingrevenge wrote: | | It depends what tyou're using as a filler, if you use steel mesh for example then the result is stronger |
i was planning on using something fiberous although steel mesh is a good idea...
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| Hotwired |
| Posted: 01/04/2008 8:38 AM Post subject: |
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UK Spudgunner
Joined: 13 Oct 2006
Posts: 1693
3582.33 Spud Bux
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It needs to be a material that is fibrous and tougher than the matrix you're putting it in.
Small flakes don't work. Pykrete is a special case.
If you mixed epoxy with steel wool you'd have a godawfully tough substance.
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| ALIHISGREAT |
| Posted: 01/04/2008 9:05 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
Posts: 1123
668.86 Spud Bux
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| Quote: | If you mixed epoxy with steel wool you'd have a godawfully tough substance.
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thats one of the things i was thning abot using, do you think epoxy combined with something like steel wool or mesh would make a strong enough piston for use i a qev at 400psi or will there be a risk of chipping or cracking?
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| jackssmirkingrevenge |
| Posted: 01/04/2008 9:18 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 6523
9946.55 Spud Bux
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| assuming it has a rubber bumper it should hold up, how thick would it be though?
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| POLAND_SPUD |
| Posted: 01/04/2008 10:43 AM Post subject: |
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Brigadier General
Joined: 13 Oct 2007
Posts: 876
2174.38 Spud Bux
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ALIHISGREAT so you are actually building this....? plizz post your results as soon as it's ready...
wouldn't a solid disc made from rubber work better? you could add something to make it more stiff, like glueing it with a smaller steel disc... but it would be better if JSR commented on this...
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| ALIHISGREAT |
| Posted: 01/04/2008 20:10 PM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
Posts: 1123
668.86 Spud Bux
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| POLAND_SPUD wrote: | ALIHISGREAT so you are actually building this....? plizz post your results as soon as it's ready...
wouldn't a solid disc made from rubber work better? you could add something to make it more stiff, like glueing it with a smaller steel disc... but it would be better if JSR commented on this... |
well i'm not making "this" i'm thinking about modding a qev for higher pressures and i kind of highjacked the topic  and for that a solid rubber disc would work very well (thats why they already have them in  ) but it would be hard making a perfect disc  so i am exploring other ideas like an epoxy piston which would need reinforcement or a plastic piston (teflon maybe) cut from a rod (which would solve the 'perfect disc' problem) but there are many things i need to think about first like the thickness of the piston already in the qev and if its worth increasing the thickness for use with higher pressures etc. maybe i will open up my qev tomorow and have a look but as i do not want to invade SPG's thread any longer if you wish to discuss this more can you please post in my '400psi ultra valve' thread
http://www.spudfiles.com/forums/400psi-ultra-valve-t12445,start,15.htm l
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| TwitchTheAussie |
| Posted: 01/04/2008 23:36 PM Post subject: |
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Brigadier General
Joined: 06 Feb 2007
Posts: 929
993.70 Spud Bux
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| jackssmirkingrevenge wrote: | | I don't really have any secrets here, forums are for sharing |
I do believe so far Ive uncovered two illegitimate children. And not knowing where ya live. Thats a bit weird
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