Iteresting new QDV variant on youtube

[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]

[LovableAirGuns]

Thats a pretty good idea I think you should make it.
It would be alot more realistic and it would have great performance

[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

[Lockednloaded]

How is the QDV opened if it is a balanced valve?

[Technician1002]

It is pulled open. The spring between the bolt and spool is not shown.

[shardbearer]

Eh. Seems complicated with not much benefit.

To those confused, it is an extension spring not compression behind the piston.

[High-PSI]

How about making the projectile the piston (obviously reversed direction). That would be even simpler.

Matt

[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.

[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.

[jackssmirkingrevenge]

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

[al-xg]

"We fire the WHOLE bullet !"

[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?

[jackssmirkingrevenge]

"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.

[High-PSI]

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