GTA
All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Big Bore AirGun Gate => Topic started by: rsterne on October 22, 2011, 04:51:38 PM
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http://www.youtube.com/watch?v=dQHulGmO0xU&feature=BFa&list=ULnikp6oFrglc&index=2#ws (http://www.youtube.com/watch?v=dQHulGmO0xU&feature=BFa&list=ULnikp6oFrglc&index=2#ws)
Quote from the builder....
Hello,
This Dynosaur is my creation. It shoots a 1000 grain bullet at, and little over 800 ft/sec.
It is capable of doing much more, only with this setting it stays in one piece for 1000 shots.
I have one shot per fill and the filling pressure is 240 bar. After one shot the pressure is 190 bar.
Because the neck of the bottle is to small I was forced to make the valve outside the bottle.
The rest is simple. 85 cm barrel from Lothar Walther and big holes....
The striker is almost 1 Kg and the spring inside makes the magnum springers jealous....
Next time I have it appart I'll will make some pictures.
BiB
No idea of the caliber, but it sure packs a whallop!!!
Bob
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wow!
thats one powerful airgun
did you notice the cocking effort put into charging the gun?
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Seems more like a small artillery piece. Also looks like a whole bunch of effort just to get it on the table to shoot it!
pv
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Thats one powerful airgun bet it is a air hog.
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Jeez, when he was getting a bullet out of the plastic bucket, it looked to be at least .50 cal and over 1-1/2" long. A 1000 gn .50cal is over 1-3/4" long, but its hard to tell. Serious knock-down power...... and fun for the sake of fun!
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I ran the numbers in the spreadsheet.... Looks like it's possible with a .58 cal 1000 gr. in a 33" (85cm) barrel to get ~800 fps without using a dump shot (but nearly, the valve closes at 30" travel).... Muzzle pressure was 2500 psi, so it would be LOUD.... (L5=0.73 for Lloyd).... I used 500cc tank, 3500 psi (240 bar) fill, 725 psi (50 bar) used for the shot....
Bob
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sounded pretty loud in the video
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I'm a bit ify on it but seams pretty hardcore
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Never saw this before this post.
That would be TWICE as powerful as the 600fpe w-500grainers AirForce I shot a few years ago. At the time (actually, up until now), it was the most powerful AirForce rifle known to exist.
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Whats there to cock on a pcp? Looks like a good effort involved?
Sorry I know nothing of pcps.
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Whats there to cock on a pcp? Looks like a good effort involved?
Sorry I know nothing of pcps.
A big mah-moo spring to drive the hammer to hit the valve to release the HPA. That gun has a BIG valve head to dump mega air.
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aznboi.....you cock the hammer. When you pull the bolt handle back on a PCP you lock the striking hammer behind the trigger sear. The hammer is a metal weight that basically hits a valve stem to open it to fire the gun.
Same principle as in a springer, or powderburner. When you cock them, you are basically locking back a striker of some sort to fire the gun when you pull the trigger.