A question/idea for pcp manufactures, or perhaps others???

[Willie14228]

Okay so Benjamin opened the door with the np2 what has surprised me is that no one has taken this concept the next step and used a nitro piston to replace the hammer spring in the PCP.
Instead of using nitrogen use the air from the PCP tank to adjust the "spring" pressure allowing it to be easily regulated to whatever the shooter is looking for.
In hunting application is would reduce the sound profile because there wouldn't be any spring twang 

 

[Brian10956]

I think it may be difficult to precisely regulate the air pressure as accurately as a spring to move the hammer. I’m not saying it can’t be down inrhink it would add more the the cost of a gun

 

[Willie14228]

In the long run the cost would be cheaper Nitro Rams are more precise than springs that is the reason it is being used in the np2 

 

[LDP]

You cant compare a gas ram for a break barrel to a hammer of a pcp. Theres a huge difference in the amount of pressure needed from a gas ram to compress the air used for the shot in a break barrel compared to the hammer energy needed to open the valve on a pcp. I could be wrong but I think it would take such a small amount of compressed air to generate the needed energy for the hammer that it might be hard to keep consistent. Hammer springs run as soft as 5 lbs maybe less for some pcp applications and most dont go over about 15 pounds. It takes very little difference in hammer spring tension and we are talking 1 ounce and less to change the hammers energy enough to change the velocity. I doubt you could consistently achieve air pressure to less than an ounce and under 20 lbs to be successfully used to drive the hammer to open the valve. Its much easier to just regulate the output of the high pressure air to consistently give the desired velocity. 

 

[Glem.Chally]

Does the nitro piston dominate the springer world? I don't even think it does that.

 

[fe7565]

In theory it makes sense to me. A small pilot air from the PCP's main air tank would "recock" the hammer which is the NP piston assembly. The rifle's trigger would release the pilot air holding the NP piston compressed or unlock the cocked piston itself so it can open the PCP air valve. According to Crossman's website the np2 "eliminates metal to metal contact" ...which reduces or eliminates hammer bounce. It should also reduce noise and increase air-use efficiency.


Here is an ancient post from Tom Gaylord on replacing a spring piston with a gas one (older version):

I’ve got gas! Part 1[/QUOTE]https://www.pyramydair.com/blog/2013/01/ive-got-gas-part-1/embed/

I’ve got gas: Part 2[/QUOTE]https://www.pyramydair.com/blog/2013/01/ive-got-gas-part-2/embed/

 

[Guest]

It's and interesting concept. If it could save space, increase lock time and be as reliable/repeatable as the current tech i'd try it.

 

[Willie14228]

Actually Fe I wasn't even talking about a live system just a gas ram, but yes you could use a pilot system that has an air regulator setting your pressure. Doesn't even need to be auto, when the user cocks the hammer the system then applies the amount of pressure called for into the ram housing