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Posted: Fri Sep 16, 2011 6:15 am
by Petitlu
For a ball of 40 grams and 120 bar:
Speed: 231m/s
Energy : 1070 J
results obtained with GGDT
Posted: Fri Sep 16, 2011 6:22 am
by MrCrowley
jackssmirkingrevenge wrote:...says the guy with the hand-held hybrid that generates higher pressures of hot gas
If only it were half as nice looking, I'd get all the french girls
Posted: Fri Sep 16, 2011 9:10 am
by Petitlu
I'm glad you like my PAC, it's good
Posted: Fri Sep 16, 2011 1:08 pm
by POLAND_SPUD
Another proof that europe rocks
Posted: Fri Sep 16, 2011 1:29 pm
by Petitlu
Yes in France we make of the powerful!
I am making a BBMG under 200 bar !
Posted: Fri Sep 16, 2011 2:33 pm
by Moonbogg
Thats a nice piece of kit, as the europeans say.
Posted: Fri Sep 16, 2011 2:41 pm
by Petitlu
Thank you your realizations are really magnificent!
I am impressed, bravo
EDIT: kit? The conception and the plans are of me...
Posted: Fri Sep 16, 2011 7:39 pm
by Zeus
Petitlu wrote:Thank you your realizations are really magnificent!
I am impressed, bravo
EDIT: kit? The conception and the plans are of me...
"A nice piece of kit" is a proverbial statement. Like "a nice piece of equipment".
Excellent work too, I like seeing high pressures used.
Posted: Fri Sep 16, 2011 7:46 pm
by warhead052
Nice job! Any chance of a diagram? I don't understand the burst disk part, but other wise everything else looks great!
Posted: Sat Sep 17, 2011 1:34 am
by Technician1002
Am I the only one who thinks adding the projectile after the air is a bad idea?
Safety for my launchers is to add the projectile when it can't possibly fire, then add air and shoot.
Posted: Sat Sep 17, 2011 1:48 am
by jackssmirkingrevenge
Technician1002 wrote:Am I the only one who thinks adding the projectile after the air is a bad idea?
Both options have their risks, what if you have a misfire while filling? In this case the burst disk is backed up by a ball valve so it's not so critical in my opinion.
Saw the videos in the meantime, that thing kicks like a shotgun! Good stuff
Posted: Sat Sep 17, 2011 2:53 am
by Petitlu
The day of the shooting I was incited enough and I badly reloaded I recognize it.
Now I am like that going to make: to put the disk of break then the bullet and the pressure. I thank you for your encouragements
Posted: Sat Sep 17, 2011 4:43 am
by POLAND_SPUD
For a ball of 40 grams and 120 bar:
Speed: 231m/s
Energy : 1070 J
results obtained with GGDT
I think that the real performance is slightly lower than this as the burst disk bursts before the ball valve completelly opens
Not that I think it isn't a cool gun -
It's great
I am just trying to make a point why there aren't too many high pressure guns (1000+ psi)
The performance of this gun could be achieved with a 7-9X hybrid and ~800-1000 psi max chamber pressure
It simply is not practical to build high pressure pneumatic guns - the increase in the price of materials & difficulty to get them is a lot higher than the performace increase you get
Posted: Sat Sep 17, 2011 5:27 am
by jackssmirkingrevenge
POLAND_SPUD wrote:Not that I think it isn't a cool gun - It's great
I am just trying to make a point why there aren't too many high pressure guns (1000+ psi)
I couldn't agree more, this is a great creation but if you want a high performance single shot launcher hybrids are definitely the way to go.
Posted: Sat Sep 17, 2011 7:01 am
by Petitlu
I think that you should not mix everything and that it is necessary to compare the weapons of the same category: PAC with PAC, hybrid with hybrid
If I change the reservoir I can fire in 300 bar (4500psi) but at the moment I am going to put in it a standard lined in calibre 45