A 2021 thread discussed desirability of self contained PCP repeating pistol. An onboard pump adds weight. If you had a PCP rifle with or without onboard pump, could you recharge pistol from rifle's reservoir? I'm thinking a two barrel pistol,. Like a Remington derringer with each barrel separately charged. What would you need a pistol with more than two quick shots for?
I'm also thinking combination springer CO2. If springer hot compressed air joined up with the cold CO2, certainly greater pressure would result.
Thanks Breeze. PCP rifles hold enough pressure for dozens of shots. I suspect a couple shots shared with a pistol wouldn't be debilitating to the rifle performance. Hunting isn't spraying pellets. My use for a pistol along with the rifle is Coup de grâce head shot of a down but wounded prey. Of course the rifle can do the point blank head shot.
The difficulty you will need to over come....
If the rifle has 3,200psi in the reservoir, and the pistol has 1800 psi. How will you open the valve to fill the pistol? Sure you can attach a hose with foster fittings to each.
But you need to open the valve with 3200psi behind it!!
Can't a pistol be designed and constructed to hold and use 3200 psi? If each barrel had it's own small reservoir, it could be totally opened when fired. No reseal needed until recharged. The high pressure has velocity advantage in a short barrel.
- The Daisy 880 has a total dump pressure reservoir. Immune to pressure lock. I've pumped up the 880 to 50 pumps. Only stopped at 50 because the increase in fps negligible beyond 50 pumps. Working on increasing volume of 880's reservoir for greater fps and heavier pellets.
https://www.gatewaytoairguns.org/GTA/index.php?topic=77463.0
"I'm also thinking combination springer CO2. If springer hot compressed air joined up with the cold CO2, certainly greater pressure would result."
That would be a waste of time. The CO2 is denser than air, and flows more slowly. The compression chamber of the gun would almost instantly bring the CO2 to ambient temperature, so any miniscule gain from heating the CO2 would be more than offset by the slower gas flow of the CO2.
Well, the air in the springer is compressed and the heat generated to the point of ignition of oil in the tube resulting in dieseling. If the timing was right, so the two gasses could mix I think the CO2 would expand to a high pressure and the air already is high pressure. If a few hundred extra fps is gained, might be worth it. 12 gram co2 cartridge capsules cost less than many individual firearm shells
@yob The C02 in a 12 gram tube is about 800 psi at 70 deg the gas that comes out is 109deg. below zero there is no way that can "mix" with the hot highly compressed air in the gun that about 2500psi
If the co2 were fired into the compression tube which is outside ambient pressure and then the spring is pronto fired compressing all the gasses at once?
I'm not saying it would work. I'm puzzling HOW TO make it work. I'm surprised it hasn't been attempted and the fail reported. Makes me suspect not been tried.
I don't know what pressure springer guns achieve. The data posted above is for multi-pumper guns. Overpumped!
Well, the air in the springer is compressed and the heat generated to the point of ignition of oil in the tube resulting in dieseling. If the timing was right, so the two gasses could mix I think the CO2 would expand to a high pressure and the air already is high pressure. If a few hundred extra fps is gained, might be worth it. 12 gram co2 cartridge capsules cost less than many individual firearm shells
The air in the compression chamber is far higher than the 800 psi in a 12g CO2. I’ve been working with airguns for about 60 years, and have seen or heard of just about every scheme during that time. Trust me, this won’t work.
I'm not doubting your expertise. Has anyone tried it? I'm not inexperienced, 75 year old retired Master Mariner. Worked on my own firearms and airguns since my first Red Ryder at age 8. Use to shoot kitchen matches from that gun which exploded into flame when striking a hard surface. Used a hammer on an entire long roll of toy cap pistol roll caps. Only once! Almost scalped myself. I've always experimented. Lol
If it's horse power you're looking for by mixing a gas with the rapid compression of a springer......
Y'all need to buy a HW54EL! There is a injector tube on the side of the spring tube, holding Ether.
So upon injecting the ether and with the rapid compression generating enough heat to cause the ether to combust. Doubling your velocity!
Is this what you want to do? Forget co2!!!
BUT NEVER USE OXEGEN IN YOUR EXPERIMENTS!--
Read about the HW54EL after your post. Haven't been made for decades and the ether ampules it's designed to use haven't been available for decades. Apparently some courageous shooters use a shot of engine starter ether in their springer.
Thanks for all the replies. I'll continue to carry a .357 pistol when hunting. An air pistol isn't worth the hassle. I'm still planning on improving my 880s. I'd like to equip one with double pumps for faster fills.
Anyway, the only springer I own is my ancient Red Ryder. I've kept all these years. I have three co2 pistols only suitable for plinking.
Anyway, thanks again for all the comments.
Oh, as an explanation, aboard ship the master is only permitted one shotgun or a pistol to quell mutiny. With limited rounds and locked away with bonded stores when in port. So, I brought airguns to sea with me to modify and plink with. A good hobby for a seaman.during months at sea.
In my mind's eye, I see a way of adding two pumps to a Daisy 880. The pellet chamber could be sliced in half on two 880 internal units. A new barrel installed that completely fills the two half chambers which clamp each side of the barrel and secured with epoxy putty. New air ports drilled into barrel both sides. The rest is some brackets to join the two pump rails parallel and devise a mechanism for cocking and firing the two valves in unison. Don't yet envision that. I'm going to try it.
