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WARPIG Tech Talk - Autococker / Minicocker
Beg to disagree......Some....

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Posted by Dale "Head_Hunters" DuPont on October 31, 2002 at 16:27:15:

In Reply to: Heard of one. posted by Vampyr on October 30, 2002 at 23:37:13:

: The mass of the hammer has very little to do with it. All of the energy is contained in the compressed mainspring. A lighter hammer is actually a better choice than a heavy hammer.

If you take that logic to an extreme, then a washer in front of the spring would work? Not likely. Too light a hammer obviously wouldn't work. Conversely too heavy a hammer wouldn't either. There is an optimal weight for the hammer and spring combination.

The spring IS stored energy but it has to be converted into kinetic energy by accelerating the hammer. Too heavy a hammer relative to the spring or vice versa, too heavy a spring for too light of hammer compromises the amount of kinetic energy that can be generated.

OK now we have a hammer moving with kinetic energy that now strikes the valve stem. Several things happen and timing is everything.

The first thing is that the valve starts to open. The more kinetic energy, the farther it can open the valve. Then the combination of the valve spring AND the internal operating pressure behind the valve trys to close the valve, slows the hammer down, stops it, and then pushes it backwards. By then your paintball is long gone.

That is called the valve open duration.
In most markers, there is excess air available that can't accelerate the ball because it has already left the barrel. That is a seperate discussion of low pressure, sweetspotting regs etc. to maximize efficiency etc.

But the heavier the hammer mass, the longer TIME it takes for the valve to reverse direction and accellerate backwards. A lighter hammer would reverse and accelerate at a higher rate.

And the beast could still fire at 300 fps because the ball is long gone out of the barrel.

If we are going to tweak our markers, it has to be something that would be effective while the valve is open and supplying air into the chamber while the ball is still in the barrel.

WE could all be splitting hairs here...

EXCEPT I hope we convinced him NOT to spend the money on a Derlin bolt....

Don't polish the receiver. It is soft aluminum. That is wearing it out prematurely. Polish the Steel Hammer. That mirror finnish on the steel hammer will put a mirror finnish on where it rubs the receiver. The rest will clear and not wear at all. A little regular cleaning and lubing will make it out last your interest in the sport. I'm at about 500,000 rounds of paint and my cocker was used when I bought it. Not worried about wear.... Looks real polished in the hammer and bolt tubes or real broken in. Whichever.....
It still performs well.



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