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Gas Ram conversions
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nunga View Drop Down
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    Posted: 08 Nov 2013 at 8:14pm
Will be taking it out tonight for field testing :) Will keep you posted

Poorshot, When you get the bug, you are never happy and will keep trying to refining it :)
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Posts: 31 		Post Options Post Options   Thanks (0) Thanks(0)   Quote poorshot Quote  Post ReplyReply Direct Link To This Post Posted: 04 Nov 2013 at 1:23pm
And I am hesitating taking my gun to bits to check lube and assembly!
 
Very impressive I would say.
 
What kind of end result will make you happy or are you just going to keep refining it?
It's all fun and games and then somebody looses an eye.
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Posts: 465 		Post Options Post Options   Thanks (0) Thanks(0)   Quote (pink)MIST Quote  Post ReplyReply Direct Link To This Post Posted: 03 Nov 2013 at 7:31pm
thats all good then, bloody reflections on photos :)
Think that'd definately fall into the "open" or "high power" class, would make for a flatter trajectpry as well
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Originally posted by (pink)MIST (pink)MIST wrote:

944 from a .22 is bloody good! The second photo at 365...... Not so much :)


thats a 9 not a 3 :)
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944 from a .22 is bloody good! The second photo at 365...... Not so much :)
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ha ha yea :)

Update. Finished testing and i managed to get just over 350psi into the ram using an old fridge compressor. Fitted it back into the gun and fired a few rounds to see how it did.

I used the same tin of .22 RWS super dome that i used before.

Here is the results through the chrony.  I got around 20fps difference between shots. I will have to look at the  main shaft seal in the ram because i think the friction is causing the changes in the FPS. But all in all i am happy with the way the ram is sealing. It will need some tweaking but it is well on the way.


 
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Posts: 465 		Post Options Post Options   Thanks (0) Thanks(0)   Quote (pink)MIST Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct 2013 at 12:21pm
Nice work bud, if you'd had it together earlier it might have helped with your dragon problem :)
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Well i finished the new the end plug with the valve, sorry didnt take photos this time. Will do some pressure testing tomorrow and if all goes well i will put in the gun and see how it goes. But it is looking good so far.
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This is my test tube with the inner tube valve  :) I have just figured out a cool little one way valve that wont take up space inside the tube so the piston shouldnt hit it.

I will try to get it done tonight because i have just been told that we are going away for the long weekend..... and the dragon-inlaw ops... my mother in law will be joining us.

Edited by Nunga - 25 Oct 2013 at 3:59pm
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Did some quick testing last night. machined up a test tube with a bike  inner tube valve  on one end to put some pressure in. I managed to get it to hold 90PSI with out any leaks. Then did a compression of the shaft and watched the pressure rise to 150 before the valve gave way. The seal its self it sweet i just need to work on the filling part. :)
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