That's how Brian did it I think. Use it.I'm thinking a hammer housed in a tube with a weak spring. When fully extended, the spring should not have enough force to open the valve, but with some momentum, it can open the valve for just a moment.
Easiest Hammer Valve
- Lockednloaded
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I'm coming back to this project after some frustration with other things, and now I have a 700psi regulator. I'm going to use a 1/2"x12" steel chamber at 700psi, and I hope to get 6 good shots with either .177pellets @ ~1000fps or .22pellets @ ~700. Does this sound possible?
- Gaderelguitarist
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It doesn't sound right. Most commercial pcp pellet guns require a couple thousand psi per fill to reach those velocities. I realize that it is also so that it can achieve more shots.
I'm sure someone will come at you with some math and prove me wrong.
I'm sure someone will come at you with some math and prove me wrong.
so many muchness
- Lockednloaded
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those numbers are probably pretty optimistic, I would be ok with 850/600, but I don't really know how I'll be able to make any calculations
If I had a 1/4" QEV piloted by this "hammer valve", would there be a huge increase in performance with out sacrificing shots per fill?
If I had a 1/4" QEV piloted by this "hammer valve", would there be a huge increase in performance with out sacrificing shots per fill?
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True, however their hammer valves tend to be quite low flow. Using a burst disk valve in this project I got 720 fps for a 0.22" pellet with "only" 400 psi.Gaderelguitarist wrote:It doesn't sound right. Most commercial pcp pellet guns require a couple thousand psi per fill to reach those velocities.
With a long enough barrel and a carefully constructed valve that keeps dead volume to a minimum I would say your ambitions are realistic in terms of performance, you will definitely get something in the 500-600 fps bracket for 0.22" pellets, and more than 6 shots per fill.
Have a look at some data for the Crosman 2240, a CO<sub>2</sub> 12 gram is very roughly analogous to your chamber size and pressure.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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I could fill the chamber with unregged CO2 for more shots and more power, but I can experiment with that once I get a new tank of CO2. All I can do is build, but not test at high pressures, so I'm wondering if the addition of a 1/4" QEV would hugely increase velocity?
EDIT:
also, what do you think of 1417A1 on McMaster-Carr as a hammer. I got the idea from a how to for a zip gun on youtube
EDIT:
also, what do you think of 1417A1 on McMaster-Carr as a hammer. I got the idea from a how to for a zip gun on youtube
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The QEV would certainly allow better performance, but you're also losing some air through the pilot so it might still even out in terms of shot count.
Looks like it could work, assuming the spring is strong enough, and it's fitted in such a way that it doesn't continue to press on the valve when in the "fired" position.
Looks like it could work, assuming the spring is strong enough, and it's fitted in such a way that it doesn't continue to press on the valve when in the "fired" position.
hectmarr wrote:You have to make many weapons, because this field is long and short life
- Brian the brain
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The spring in those is certainly strong enough.
We sell them at work.
But unfortunately they do push all the way, so the valve will remain open.
I did not use a tube and spring kind of hammer.
I used a hammer kind of hammer....
We sell them at work.
But unfortunately they do push all the way, so the valve will remain open.
I did not use a tube and spring kind of hammer.
I used a hammer kind of hammer....
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!
Can't ask for a better compliment!!
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!
Can't ask for a better compliment!!
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You mean there's a small person inside your launchersBrian the brain wrote:I used a hammer kind of hammer....
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Yes.
That is exactly what I mean.
You should see my new leprechaun powered blowback rifle.
It is way more compact than my Pigmee gun turret.
That is exactly what I mean.
You should see my new leprechaun powered blowback rifle.
It is way more compact than my Pigmee gun turret.
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!
Can't ask for a better compliment!!
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!
Can't ask for a better compliment!!
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That diagram totally reminds me of Hapland... lol... thats pretty funny.
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
- Lockednloaded
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I made a flintlock style hammer mech with some sheet PVC, but after a few shots it cracked. Do you think polymorph would handle the force better?
- jackssmirkingrevenge
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My generation had Lemmings on their Amiga 500 (512 kB of memory man )Gun Freak wrote:That diagram totally reminds me of Hapland... lol... thats pretty funny.
I doubt it, no sheet aluminium?Lockednloaded wrote:I made a flintlock style hammer mech with some sheet PVC, but after a few shots it cracked. Do you think polymorph would handle the force better?
hectmarr wrote:You have to make many weapons, because this field is long and short life
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I don't have the tools to make the curved cuts that I need, and I would have to order sheet aluminum as well
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I think you could manage with a dremel
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!