TargetTalk

Which pistols have recoil damping with the assistance of pneumatics?
Any good explanations of these systems on the web?

Thanks
KWW

I am only aware of one that will fall into that category; Walther SSP
Kent

I am only aware of one that will fall into that category; Walther SSP
Kent

Is there a good technical description of the ssp on the web?
Thanks

keithwwalker wrote:Which pistols have recoil damping with the assistance of pneumatics?
Any good explanations of these systems on the web?

Thanks
KWW

If you ask for recoil damping stricto sensu, only the SSP. But pneumatics is also used to lock the breech in some big bore pistols like the H&K P7 (or PSP)

jipe wrote: If you ask for recoil damping stricto sensu, only the SSP. But pneumatics is also used to lock the breech in some big bore pistols like the H&K P7 (or PSP)

Do we still call it pneumatics in the P7 when its burnt powder gasses?
And the P7 slide is never locked, its a delayed blowback arrangement.

wiki has a nice graphic of the P7 delayed blowback, would be nice if there was a graphic on the SSP like that

Makris D. G. wrote:

jipe wrote: If you ask for recoil damping stricto sensu, only the SSP. But pneumatics is also used to lock the breech in some big bore pistols like the H&K P7 (or PSP)

Do we still call it pneumatics in the P7 when its burnt powder gasses?
And the P7 slide is never locked, its a delayed blowback arrangement.

Makris D. G. wrote:

jipe wrote: If you ask for recoil damping stricto sensu, only the SSP. But pneumatics is also used to lock the breech in some big bore pistols like the H&K P7 (or PSP)

Do we still call it pneumatics in the P7 when its burnt powder gasses?
And the P7 slide is never locked, its a delayed blowback arrangement.

Pneumatic is by action of a gaz, not necessarily pure air !

You are right, the exact name is delayed blowback and the breech is indeed not mechanically locked but remains closed until the bullet leaves the barrel and the pressure drops. By the way, even with a mechanically locked breech, it is also a delayed breech opening since after the small initial down+rearward movement of the barrel+breech assembly, the breech is unlocked.

When the breech opening starts, there is some pneumatic damping since the hole between the barrel and the reservoir is small just like in the SSP where there is a calibrated hole that allows the air to escape.

jipe wrote: When the breech opening starts, there is some pneumatic damping since the hole between the barrel and the reservoir is small just like in the SSP where there is a calibrated hole that allows the air to escape.

Hadn't considered that, seems logical :)

In technical terms, the recoil caused by the gun exactly balances the forward momentum of the projectile and exhaust gasses according to Newton's third law. A recoil piston is slidably disposed in the recoil cylinder and is operatively connected via a piston rod to the gun barrel.

Pneumatic cylinders