insane springer air rifle
i just want to put it out there for consideration. i'm thinking about building a springer someday but with a pop-off. the air will burst quicker than it would with the spring alone. if it is successful i hope to integrate this into an airsoft gun. the way i see it the resistance of the pop-off would be adjust as easily as the hop-up if it was built right. it'll be pretty sweet if one of you guys did it first. i'm pretty sure that a simple pop-off will make springers way better especially airsoft sniper rifles.
WHY PAY FOR IT WHEN U CAN MAKE IT?
I'm sure you don't take me as an idiot... (Well, perhaps as far as electronics are concerned, maybe.)Technician1002 wrote:As a physics nut and general science junkie lets get on the same page for the terms used.
While we're here, can we only quote the parts of posts we're actually referring to? (Except where it's essential I don't, I always cut down quotes to simply keep myself in the habit of it)
Assuming it's happening in the same time (and obviously, neglecting air resistance).Accelerating from 0-50MPH requires the same force as accelerating from 50-100MPH.
But either way, I'm assuming no change in barrel length (as I believe our OP was), and under those circumstances, 1000 fps takes 4 times the force that 500 fps does.
As you say, force times distance. Same distance for four times the energy, must mean four times the force. (And assuming that calibre is the same, consequently, four times the pressure)
Hence, nothing I said was in error, apart perhaps from not stating the "for the same barrel" part, but I assumed that could be taken as read. Obviously not.
Does that thing kinda look like a big cat to you?
- Technician1002
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Force = Mass X AccelerationRagnarok wrote:
But either way, I'm assuming no change in barrel length (as I believe our OP was), and under those circumstances, 1000 fps takes 4 times the force that 500 fps does.
To accelerate in the same distance something that is already moving will require applying 4 times the force in 1/2 the time for the same distance and twice the speed.
In reverse, this is the way the springers get high force on a small projectile. The end of the piston stroke is short but the force is high.
Yes, as I have been aware for half my life. But still, force times distance is the more useful here.Technician1002 wrote:Force = Mass X Acceleration
Then again... perhaps v<sup>2</sup> = u<sup>2</sup> + 2as would be an even better choice.
Does that thing kinda look like a big cat to you?
@ I-will:
I believe the popoff will destroy your efficiency rating. Think of pump action pneumatic guns. Their efficiency is very low because you are pumping air by hand. Most of the energy transfer in a springer is due to air flowing from the chamber cylinder to the barrel. Having the wall of a popoff there will effectively suck up the energy so to speak.
My design uses an o-ring sealed piston. The whole rear part of the gun is a big air chamber. The cylinder is pulled back by a cocking handle out the side, and the air cylinder seals against the main chamber wall behind the hole where the handle comes out. At full rear stroke, the rear of the piston is caught by a hook (Well its a little more complicated but suffice to say the piston catches) Then the chamber's air pressure pushes the cylinder forward into firing position. When the hook is released by the trigger, the piston is thrust forward by the air pressure. The good thing is I can up the pressure as far as the strength of my arm and comfort's sake will allow.
I believe the popoff will destroy your efficiency rating. Think of pump action pneumatic guns. Their efficiency is very low because you are pumping air by hand. Most of the energy transfer in a springer is due to air flowing from the chamber cylinder to the barrel. Having the wall of a popoff there will effectively suck up the energy so to speak.
My design uses an o-ring sealed piston. The whole rear part of the gun is a big air chamber. The cylinder is pulled back by a cocking handle out the side, and the air cylinder seals against the main chamber wall behind the hole where the handle comes out. At full rear stroke, the rear of the piston is caught by a hook (Well its a little more complicated but suffice to say the piston catches) Then the chamber's air pressure pushes the cylinder forward into firing position. When the hook is released by the trigger, the piston is thrust forward by the air pressure. The good thing is I can up the pressure as far as the strength of my arm and comfort's sake will allow.
- Brian the brain
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Been thinking about this..( to bypass local laws)
How about using combustion ( metered or otherwise) to power the piston.
A little like a light gas gun...but reusable and slightly slower..
Since propane is cheaper than bottled CO2 for instance..it might be a good choice.
As I am no combustion guy myself and know little about the subject..but it seems like a large ( combustion side) surface piston driving a smaller one ( pneumatic side) could very well pack a punch...without too much effort.
And of course shock heating might get us over SOS.
How about using combustion ( metered or otherwise) to power the piston.
A little like a light gas gun...but reusable and slightly slower..
Since propane is cheaper than bottled CO2 for instance..it might be a good choice.
As I am no combustion guy myself and know little about the subject..but it seems like a large ( combustion side) surface piston driving a smaller one ( pneumatic side) could very well pack a punch...without too much effort.
And of course shock heating might get us over SOS.
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!!
yeah I know what you mean, there are plenty of ways to do it, but they would all be very hard to do, and posibly dangerouse if you don't know what your doing lol.Ragnarok wrote:...or a hybrid. There are two I can think of that have recorded 2000 fps+ velocities.Marco321 wrote:To get 2000fps+ you would need like solid propellant...
Possibly one or two others as well.
I would also note that one of the fastest projectiles I know of at 110,000 fps (not a typo) didn't use a combustible propellant.
Similarly, at a more leisurely 8,000 fps, the US Navy railgun doesn't use solid propellant.
Failure to plan is planning to fail.
The 7 P's - Proper Prior Preparation Prevents Piss Poor Performance
The 7 P's - Proper Prior Preparation Prevents Piss Poor Performance
take a look at this page.
http://www.boltsniper.com/BS-8/BS8.htm
95% PVC construction. springer powerfull air gun.
http://www.boltsniper.com/BS-8/BS8.htm
95% PVC construction. springer powerfull air gun.
- Mr.Sandman
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Well hes getting around 100-200 fps so thats not very useful. I dont thats really what i would call powerful i could make something more powerful with a ball valve.
Yeah, it's that important.
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Heavier than what? I can outdo that with a ball valve, 1 inch pipe, some superballs and ten minutes. Sure, he could neck it down to 6mm and shoot a BB out of it at a decent speed, but then you have one freaking huge piston in relation to the rest of everything.
Completed projects:
CA1 SMSS Basic Inline
CA3 PDAB Airburst Cannon
Current Project: Bolt action rifle (25x140mm + 1in shot)
CA1 SMSS Basic Inline
CA3 PDAB Airburst Cannon
Current Project: Bolt action rifle (25x140mm + 1in shot)
True.SEAKING9006 wrote:Heavier than what? I can outdo that with a ball valve, 1 inch pipe, some superballs and ten minutes. Sure, he could neck it down to 6mm and shoot a BB out of it at a decent speed, but then you have one freaking huge piston in relation to the rest of everything.
All i meant to to was to show a design that was similar to what to OP was talking about. Not to showcase the design's "Raw power" ahhhahaa
Any ways, springs and pistons simply are out of the question of the AVERAGE builder on these forums who is looking for power.
Now, for pure coolness factor.... you must admit... that is one kick *insert other word for butt* nerf gun. lol
I have tried, and failed many times to make a springer than can even begin to compare to something as basic as a simple pop-bottle/ball valve cannon.
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It would be interesting to see a combustion powered piston gun where the spring is replaced by a fuel/air mixture. That would certainly ease the problem of having to hold back a powerful spring and make the concept more accessible to home builders.
hectmarr wrote:You have to make many weapons, because this field is long and short life