[BlackDogAirsoft]

The article discusses how altering piston weight and cylinder volumes can make an air rifle more efficient. Curiously, the cylinder volume is decreased, and the piston is lightened.

A Perfect Formula? Airgun Design Breakthrough - Airgun Magazine

After years of R&D, one airgun technician may have just made the biggest discovery ever in terms of spring-powered airgun design. Simon Everett meets him to find out more… There are many Weihrauch aficionados who’ll tell you the earlier HW77s – those with a 25mm diameter piston – are better than...

www.airgunmagazine.co.uk

 

[SiliconeSword]

Very interesting indeed!

I feel that a longer and thinner cylinder will definitely give more power and so will a larger exit hole.

 

[BlackDogAirsoft]

a larger exit hole.

Can confirm, this does work. You can drill out a vsr10 cylinder head to get more energy. You can also weaken an airsoft gun by making the opening smaller.

 

[SiliconeSword]

Yeah, this has been known for a while by most.
What this post proves(already proved) is that piston weighting is sometimes advantageous, and sometimes disadvantageous, which hopefully people will realize.

 

[wyz2285]

What isn't comparable is airgun pellet expands with pressure and has quite a bit of friction during the entire travel inside the barrel.
And the HW97 long barrel (competition model) is weaker than the HW97K (hunting model short barrel).