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| maverik94 |
 Posted: 11/10/2009 17:54 PM Post subject: New Hammer for PCP Guns |
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Mandolin Man
Joined: 21 Jan 2009
Posts: 560
55.88 Spud Bux
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Ok, so I have been fiddling around with some ideas for a good hammer for my pcp gun. I have tried the normal cylindrical hammer design, and it worked.....about 10% of the time. Anyway, I have had the idea of using a hammer like a hammer in a Flintlock and Percussion-Cap Guns. So here is what I have come up with. It is pretty simple, I built it in about 30 minutes, but it is functional and reliable, especially considering the time spent and the fact that it's just a prototype. Well, here is the hammer/trigger setup:
Here is the hammer cocked:
Here are the parts of the setup labeled:
Here is a picture of the internals of a real flintlock for comparison:
Anyway, I thought I'd show this to y'all. If you have any questions, just ask!
-Maverik94
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| jackssmirkingrevenge |
| Posted: 11/11/2009 0:09 AM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18058
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Looks good, now pull off the trigger from a blowgun and mount it so the hammer strikes the stem et voila, you've got yourself a hammer valve 
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| inonickname |
| Posted: 11/11/2009 2:43 AM Post subject: |
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Major General
Joined: 07 Dec 2008
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I tried something similar, though my pivot points were set up poorly so it didn't work well.
Nice work
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| psycix |
| Posted: 11/11/2009 4:54 AM Post subject: |
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Donating Member
Joined: 25 Jun 2007
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| Looks like a good start. Don't forget you can add weight to the hammer.
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| Demon |
| Posted: 11/11/2009 6:21 AM Post subject: |
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Colonel
Joined: 13 Apr 2008
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Here is a hammer that i will be using for my own pcp
but im not sure it suits your needs as it is for use with an inline barrel(for an airforce condor)
Even, is this design ok or it wont work for some reason?
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| boyntonstu |
| Posted: 11/11/2009 7:37 AM Post subject: |
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Brigadier General
Joined: 28 Jun 2009
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My thought concerns the hammer force.
If the trigger spring and hammer spring were reversed and the hammer spring pulled from a point further away from the pivot, you would have a stronger hammer.
Is the force of the hammer the major criteria?
BoyntonStu
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| jackssmirkingrevenge |
| Posted: 11/11/2009 8:45 AM Post subject: |
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aspiring machinist
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| boyntonstu wrote: | | Is the force of the hammer the major criteria |
Stronger hammer force = faster opening time and longer dwell time = more power but less shots per pressurised reservoir.
You can vary it by changing the spring strength and travel, as well as the actual weight of the hammer. It pays to do some tuning to make sure you're not letting out too much air per shot.
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| maverik94 |
| Posted: 11/11/2009 15:07 PM Post subject: |
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Mandolin Man
Joined: 21 Jan 2009
Posts: 560
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| Thanks for all the comments!, well, as far as weight, I think this with a longer mainspring will work fine, I used the same spring in an inline (like demon's) hammer, and it opened my gun, and this hammer is more than twice as heavy than that one, so I'm not too worried. I will post more pics and results as I do more work!
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| Brian the brain |
| Posted: 11/11/2009 16:09 PM Post subject: |
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Dutch Spud Clan Leader
Joined: 05 Dec 2005
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| Quote: | | Is the force of the hammer the major criteria? |
Yes.
or maybe no.. 
If you meant " the springforce" than no...
The force the hammer exserts on the valve depends a lot on the weight of the hammer too.
Simply think of it this way.The valve needs a lot of force to open it.
What would work better to move a brick? firing a 6mm airsoft bb at it , or a 30 pound dumbell at 100 miles an hour?
Both weight and springforce make up the energy to move it.
You need a little of both.A weak spring can't accelerate a heavy hammer.
Good job at showing the inner workings of my B2TB...and of course Shatterhand.  
You could do what I did and curl a spring around the axle of the trigger and support one side of it against the sear axle.
The other end is curled around the back of the trigger.
This makes it all much smaller.
Some doorhandles are equipped with a flat coilspring.I used two on Shatterhands hammer.
Again, this makes it more compact.
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| maverik94 |
| Posted: 11/11/2009 18:14 PM Post subject: |
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Mandolin Man
Joined: 21 Jan 2009
Posts: 560
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| Oh, BTB, I didn't realize this was how your hammer on Old Shatterhand worked! Cool, I wasn't trying to steal you idea, In fact i didn't know if anyone had used this type of hammer on SF yet. I just came up with this while studying the internals of flintlocks/Percussion cap guns. I didn't have time to work on it at all today, and I probobly won't have time either tomorrow, but come the weekend I'll be able to work on this more and then I'll post my progress. Again, thanks for the comments, and BTB, is there any way you can post a picture or drawing of what you are talking about? I don't quite undertand what you are describing above. Thanks!
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| psycix |
| Posted: 11/12/2009 2:32 AM Post subject: |
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Donating Member
Joined: 25 Jun 2007
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| Quote: | | What would work better to move a brick? firing a 6mm airsoft bb at it , or a 30 pound dumbell at 100 miles an hour? |
Unless you fire the BB at just about 1% of the light speed or more.
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| VH_man |
| Posted: 11/12/2009 5:59 AM Post subject: |
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Swimmaman
Joined: 09 Dec 2006
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Funny.... I just drew up something similar to pilot my .177 stick gun.... mine is a bit more complex, however. I might steal your idea
Good idea to construct it on a board first. Helps you design your complex mechanisms without worrying about where to put stuff at that moment....
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| maverik94 |
| Posted: 11/12/2009 20:32 PM Post subject: |
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Mandolin Man
Joined: 21 Jan 2009
Posts: 560
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| Ok, thats fine VH_man, As you can see, I'm not the first to come up with the idea, actually it's been around for a few centuries, so feel free to, as you said, "steal it".
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| Major Collins |
| Posted: 11/22/2009 4:29 AM Post subject: |
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2nd Lieutenant
Joined: 18 Nov 2009
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| hrmmm it looks as if it would work just on the idea of semi auto if you use the bleed in valve idea of havering 2 ball valves one to fire ,one to release air from a primary chamber into a secondary chamber .. ive head people use regulators for more shots... how would this work ? does the air get into the forced into the secondary chamber through a regulator? eg have a primary chamber that can hold 400 psi but when you bleed air into the secondary chamber you have the pressure of 125 psi but you can still take 5 shots.. (dosent add up lol 5 shots of 125 psi = 525 psi ) can someone please explain?
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| Brian the brain |
| Posted: 11/22/2009 6:42 AM Post subject: |
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Dutch Spud Clan Leader
Joined: 05 Dec 2005
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| Quote: | | Oh, BTB, I didn't realize this was how your hammer on Old Shatterhand worked! Cool, I wasn't trying to steal you idea, |
I have recently invented something called "the wheel"
Also I would like to patent the idea of rubbing two sticks to get fire..
There is nothing about any of my guns you can't copy.If I would want to keep it to myself I wouldn't be posting it here ,would I?
The only trick I added is a square axle to bring the hammer out to the right side of the body..
| Quote: | | hrmmm it looks as if it would work just on the idea of semi auto if you use the bleed in valve idea of havering 2 ball valves one to fire ,one to release air from a primary chamber into a secondary chamber .. ive head people use regulators for more shots... how would this work ? does the air get into the forced into the secondary chamber through a regulator? eg have a primary chamber that can hold 400 psi but when you bleed air into the secondary chamber you have the pressure of 125 psi but you can still take 5 shots.. (dosent add up lol 5 shots of 125 psi = 525 psi ) can someone please explain? |
indeed..This is about hammervalves and hammers....
For the twin BV idea you might wanna check this:
Topic found here:
*click but don't kick*
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