Piston gliding

[ccdjg]

What the hell is "piston gliding"?

If it just means making the piston fit for purpose, why not say so?.

[Rob.R]

What the hell is "piston gliding"?

If it just means making the piston fit for purpose, why not say so?.

im in the same boat bud, dont have a clue . would be interesting to find out tho.

[joffy]

im in the same boat bud, dont have a clue . would be interesting to find out tho.

Oh another Dunstablian

[ccdjg]

Oh another Dunstablian

I think there may be a few more of us.
Nothing wrong with admitting ignorance, even about marketing gimmicks.

[Mach 1.5]

Friction is a wasteful by product of metal to metal contact. Instead of large expanses of piston, sliding against the inside walls of the rifle's chamber, actions run on nylatron etc bearings - in fact there's no metal to metal contact at all. Venom and Airmasters was doing this method back in the 80's. No marketing gimmick as owners of their fine rifles will tell you and the fact AA and Walther copied it for their production rifles. Mach 1.5

[ptdunk]

I found on my Britannia (slots on bottom of piston) if the piston isn’t consistently central it can affect sear engagement and result in an inconsistent trigger weight.

I considered buttoning the piston but found a snug piston sleeve and spring guide locked it all in centrally when cocked. Works well.

Matt

[ccdjg]

Friction is a wasteful by product of metal to metal contact. Instead of large expanses of piston, sliding against the inside walls of the rifle's chamber, actions run on nylatron etc bearings - in fact there's no metal to metal contact at all. Venom and Airmasters was doing this method back in the 80's. No marketing gimmick as owners of their fine rifles will tell you and the fact AA and Walther copied it for their production rifles. Mach 1.5

Common sense says that any surface to surface contact that reduces friction is going to improve piston efficiency, provided the air seal is not compromised. Which is why for more than 200 years air guns based on the spring piston have used oiled leather seals, thereby avoiding metal to metal contact. Synthetic seals are just a more recent variation on this. Modifying a piston to have minimal friction has been a given for many, many years, so why does a manufacturer have to introduce a new term like "gliding" , as though it is some new hi-tec approach that others have not considered? Smoke and mirrors to push sales, IMO.

[Geezer]

What Mach 1.5 said.

In addition, ensuring the rear of the piston is supported means that it moves in a straighter line as the spring unravels, and the tuner can tighten the tolerances between piston, liner, top hat/guides and spring, reducing frictional energy and torque effects, and smoothing the shot cycle.

Yes, terms like “Lazaglide” were good advertising, and, yes, the cost/benefit ratio of this sort of custom work was always questionable compared to a “spit and polish” service/tune, but it is hard to argue against Messrs Pope, Hancock, Welham, etc.

It’s also notable that the AA TX and “Walther” LGU/LGV do the same in factory form, and (setting aside some irrelevant issues around the durability of the “Walther’s” trigger group) are generally regarded as exceptionally nice-shooting out of the box.