1CC = 1fpe plenum to bullet energy "rule"

[Chickenthief]

Hello Sir.
So how "firm" is this rule of yours?

Thing is that i'm having an Airforce Texan .45 TX2 and i thought that i "thought" of a neat addon.
In short replacing the bottle with a tube/plenum and have the shoulderstock include 2 90deg bends + an underlying carbon bottle. But since the AF has a 480cc bottle for a 700fpe gun i'm SOL for an upgrade and i think i just might go thethered like all the rest ;-)

Like Peter Sellers said in the film: Murder By Death. Angry man arguing with cow on wall, is like train without wheels, soon gowing nowhere. https   ://youtu.be/ne9hTr5jwB4?t=44
Noob = no external links so omit the space between https and :// and you should be good!

[Motorhead]

This common base line of 1cc per ft-lb of power is spoken of in REGULATED PCP's and not those PCP's that take / use the entirety of the tanks volume to supply the shot.
As stated many times you can get away with 1/2 cc per ft-lb and still make high power, it just takes a higher set point pressure to extract the same power using just the air within a regulated guns plenum.

[rsterne]

If the reservoir is only 1/2 cc per FPE, you will produce a bit less power from the same pressure than if the reservoir was 1 cc per FPE.... Consider this chart....



As you can see, the smaller the reservoir, the less power.... but it doesn't become a serious problem until you go below about 1/2 cc per FPE.... The drop from 1 cc per FPE down to 1/2 cc per FPE is about 8%....

Bob