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Iteresting new QDV variant on youtube
Posted: Sat May 14, 2011 11:35 am
by Technician1002
I was checking my youtube channel and noted another QDV animation in the related videos. It is a bolt action QDV with a spring to pull it open (the spring isn't shown). It lacks a bumper though.
I like the animation. It shows the action of the piston and projectile as the valve cracks open.
With a little variation this could be adapted to make a breech loading bolt action cannon.
[youtube][/youtube]
Posted: Sat May 14, 2011 11:47 am
by LovableAirGuns
Thats a pretty good idea I think you should make it.
It would be alot more realistic and it would have great performance
Posted: Sat May 14, 2011 4:24 pm
by POLAND_SPUD
not new... wrote about it a few month ago and that one is breech loaded
EDIT
sry I meant mine is breech loaded
Posted: Sat May 14, 2011 4:42 pm
by Lockednloaded
How is the QDV opened if it is a balanced valve?
Posted: Sat May 14, 2011 5:41 pm
by Technician1002
It is pulled open. The spring between the bolt and spool is not shown.
Posted: Sat May 14, 2011 7:54 pm
by shardbearer
Eh. Seems complicated with not much benefit.
To those confused, it is an extension spring not compression behind the piston.
Posted: Sat May 14, 2011 8:51 pm
by High-PSI
How about making the projectile the piston (obviously reversed direction). That would be even simpler.
Matt
Posted: Sat May 14, 2011 9:28 pm
by Technician1002
I accidently did that once with my ABS cannon. It was leaking. I tried to move the piston just a little to try to get a better seal and pushed it too far in.. The pressure was low, but the piston still made good distance.
Posted: Sat May 14, 2011 10:17 pm
by shardbearer
The problem with that is the difficulty of making a piston. Would be solved by putting the o rings on the gun instead of the piston. Then could use something like a piece of PVC pipe as the piston.
Posted: Sun May 15, 2011 1:27 am
by jackssmirkingrevenge
High-PSI wrote:How about making the projectile the piston (obviously reversed direction). That would be even simpler.
I've been
banging on about that for years
On another note, I hear rumours of a spring-loaded QDV concept that might be published soon
Posted: Sun May 15, 2011 5:22 am
by al-xg
"We fire the WHOLE bullet !"
Posted: Sun May 15, 2011 5:50 am
by Zeus
Taken from the
launcher design thread.
And yes, this post was pointless.
Edit: note 6 cases already ejected, yet the
magazine is still more or less full?
Posted: Sun May 15, 2011 6:37 am
by jackssmirkingrevenge
al-xg wrote:"We fire the WHOLE bullet"
That's 65% more bullet PER BULLET
Zeus, I don't think even the caseless G11 had that cyclic rate
maybe the Metal Storm stuff might come close.
Posted: Sun May 15, 2011 7:34 am
by High-PSI
jackssmirkingrevenge wrote:High-PSI wrote:How about making the projectile the piston (obviously reversed direction). That would be even simpler.
I've been
banging on about that for years
On another note, I hear rumours of a spring-loaded QDV concept that might be published soon
Cool. I have wondered why no-one has done that as of yet.
Hmm, it must be that since I can machine my own parts, making custom projectiles is no big deal.........
I like the O-rings in the barrel idea.
Matt