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  #11  
Old 11-28-2006, 03:13 PM
Hob Hayward's Avatar
Hob Hayward Hob Hayward is offline
not a nublet, sheesh.
 
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Default Re: 1385+ shots = 68/4500

And you didn't factor in that dryfires use more gas a real shot.
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  #12  
Old 11-28-2006, 05:41 PM
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Default Re: 1385+ shots = 68/4500

on the stock spyder, i doubt it. its not a linear equation, and 500 psi isnt enough, for me anyway, to estimate. if this was a linear equation, sure, 1300 sounds reasonable. but no.

on drago's, the fact that he had shot most of his tank already means that he can get a much better estimate on his remaining shots with linear reasoning (if thats the right way to say it). 1385 is unlikely, but possible.

hob's right, too. but i dont think they would make much of a difference unless you're talking 200 or 300 dry fires. not real sure about that.
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  #13  
Old 11-29-2006, 07:52 AM
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Default Re: 1385+ shots = 68/4500

pics of striker exhaust port blocker thingy?
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  #14  
Old 11-29-2006, 10:57 AM
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Default Re: 1385+ shots = 68/4500

Hob's not entirely right... The valve will let out however much you allow it to, so if you chronograph it to shoot, say, 275fps, then it will use EXACTLY the same amount of air to fire real balls and dryfires as well. 1385 is decent, but I still got better from my LP Spyder... heh... 700-750 (depending on leaks and such) from a 48/3k. By math, that would mean.... 1487.5 shots from a 68/45? Lord knows how many Druid was getting from the Esprit, either. I'm just waiting for him to post up his numbers.

EDIT: Forgot to say I parted out the marker long ago (about a year and a half ago, now), and can't remember all I had on it. So no specs, unfortunately. If I find the thread I posted them in, I'll post them up.
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  #15  
Old 11-29-2006, 05:05 PM
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DRAGON DRAGON is offline
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Cool Re: 1385+ shots = 68/4500

Quote:
Originally Posted by Spinal
any pics of this blocked striker exhaust port?
Wasn't going to take it apart specifically to get a pic for you but I was tinkering tonight and took a pic for ya -



Just tap it to 6-32(no need to drill because the hole is relative for the 6-32 tap), clear the burrs w/a pin file on the inside(lower tube) and using your fingers, just use a slightly larger drill bit on the outside to lightly chamfer the hole, then blue Loctite a 6-32 X 1/16" set screw in the freshly tapped hole making sure it's not protruding past the inside surface of the bottom tube. Using any other valve outside of the Rocket valve and all it'll do is cause recocking probs -
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  #16  
Old 11-30-2006, 05:44 PM
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Default Re: 1385+ shots = 68/4500

wait so, if i don't have a rocket valve, that mod is basically useless? how about with a tornado?
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Last edited by Spinal : 11-30-2006 at 05:55 PM.
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  #17  
Old 11-30-2006, 06:10 PM
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Default Re: 1385+ shots = 68/4500

Quote:
Originally Posted by bigred76
Hob's not entirely right... The valve will let out however much you allow it to, so if you chronograph it to shoot, say, 275fps, then it will use EXACTLY the same amount of air to fire real balls and dryfires as well.
you sure? theres no backpressure from the ball to keep air from escaping on its own, and on a blowback at least, that pressure helps close the valve and recock the marker. when i was tuning my lp spyder, there was one point when it would not recock without a ball in there, suggesting that more air IS used when dryfiring... maybe with an electropneumatic the air used is the same, but im very doubtful about blowbacks...
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  #18  
Old 11-30-2006, 07:39 PM
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Default Re: 1385+ shots = 68/4500

Quote:
Originally Posted by calebh
you sure? theres no backpressure from the ball to keep air from escaping on its own, and on a blowback at least, that pressure helps close the valve and recock the marker. when i was tuning my lp spyder, there was one point when it would not recock without a ball in there, suggesting that more air IS used when dryfiring... maybe with an electropneumatic the air used is the same, but im very doubtful about blowbacks...
More air isn't being used, there's just no backpressure. The valve is still open the same amount of time as with the ball, so the same amount of air is being used.
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  #19  
Old 11-30-2006, 07:59 PM
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Default Re: 1385+ shots = 68/4500

then explain my marker not recocking when theres not a ball in it, but working fine with one... im afraid im gonna go with the logical conclusions from my own experiences on this one. given that, even if you post some super technical study someone performed proving that the amount of air is the same, i might still go with my own experience.
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  #20  
Old 12-01-2006, 03:43 PM
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Default Re: 1385+ shots = 68/4500

Your valve is still open the same time, but it routes the air out the barrel more because of no backpressure (as you pointed out) when there is no ball. If there's a ball in the breech, then the air is encouraged to go out the back of the valve slightly more as that's the only other place it can go (if the ball's snug in your barrel). It don't make much sense... but that's what happens.
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