How to Load Baby Desert Eagle .177 Co2 Bb Air Pistol

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Topic: Umerax magnum inquiry infant desert eagle power modification  (Read 651 times))

So as a new fellow member I don't have motion picture posting privileges, I'll just have to be super descriptive.
The baby desert eagle is an inexpensive co2 powered repeating pistol with a 15 bb "mag"  along the acme of the barrel enclosure.
Stock it'southward rated for 420 fps. I recently had it apart and figured out a power mod.
It's held together past Phillips screws, a long one at the muzzle end (under leap pressure, conscientious) and a modest one on the hammer, one for the picatinny (don't lose the ballast for this one)  and the other half dozen are the same size.
The action goes like this, the trigger pushes the barrel forward past the bb feed and confronting the bound encircling the butt, when information technology breaks the butt slams dorsum loading the bb then pushing in the co2 valve, co2 released, bb flies, tin can dies.
The co2 valve has a nipple for the cartridge feeding a fairly large sleeping accommodation, a blast shaped pin is held by the valve spring sealing the hole on go out side, the shaft feeds through the pigsty and protrudes outside equally the pivot. The shaft of the pivot is hollow almost to the head where it connects to a hole through (perpendicular to) the shaft (I'll call this the leave port). Pushing the pin into the valve puts the exit port into the co2 chamber which flows through the exit port, down the pin through a collar into the barrel.
Some might try increasing the strength of the barrel spring thinking they could open the valve longer. Not so much, there is a collar, a hollow stepped cylinder that pushes the hollow valve stem on one side and gets pushed by the breech cease of barrel on the other. This collar only allows the valve to be pushed in about 1/2 a mm. Checking the inside of the valve I found that but about 1/three of the get out port was exposed with this picayune move. So no matter how stiff a butt jump you had the collar prevents information technology from opening the valve further.
If you reduce the length of the collar on the valve side (the larger diameter side) you tin can increase the co2 output. The valve stalk gets pushed further, exit port opened more than and valve open up longer. I figured taking off about 1 mm would fully betrayal the get out port on the inside of the valve.
I took it downwards about 0.half dozen mm and it seems actress punchy. Gonna run through co2 faster but I found this guy would still have tons of co2 subsequently I was washed shooting, commonly one cartridge would last 3-4 sessions.
I need to make a chronograph so I can give existent numbers.
One might also try enlarging the exit port and id of pivot and collar
I hope that'southward articulate enough, if non ask questions.
Thanks you

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Ive never had my Crosman PFM16 apart, merely I think it works the aforementioned way equally your Desert Eagle. I�ve ofttimes wondered why I�ve never read near these CO2 pistols existence modded. I might accept to take mine apart and look into enlarging the port that lets gas flow through the piercing pivot to the valve. I tin can�t imagine there is much plenum there, and then allowing more gas through the piercing pivot might have a considerable result on velocity.

Peradventure we tin can start a modding trend, who can become the almost FPS out of a semi-auto CO2 BB pistol.

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Crosman PFM16
QB78S
Gamo Urban
Beeman AR2079b
Daisy 853 from CMP
RWS 34 Meisterschutze Pro Compact

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• SE Pa.

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And so as a new member I don't have film posting privileges, I'll just have to exist super descriptive.
The baby desert eagle is an inexpensive co2 powered repeating pistol with a 15 bb "magazine"  along the top of the barrel enclosure.
Stock it's rated for 420 fps. I recently had it autonomously and figured out a power mod.
It's held together past Phillips screws, a long one at the muzzle finish (under spring pressure, careful) and a small-scale one on the hammer, one for the picatinny (don't lose the anchor for this one)  and the other one-half dozen are the aforementioned size.
The action goes like this, the trigger pushes the barrel frontward by the bb feed and confronting the spring encircling the barrel, when information technology breaks the barrel slams back loading the bb then pushing in the co2 valve, co2 released, bb flies, tin can dies.
The co2 valve has a nipple for the cartridge feeding a fairly big bedroom, a nail shaped pin is held by the valve leap sealing the hole on go out side, the shaft feeds through the hole and protrudes outside as the pivot. The shaft of the pin is hollow near to the head where it connects to a hole through (perpendicular to) the shaft (I'll phone call this the get out port). Pushing the pin into the valve puts the exit port into the co2 sleeping room which flows through the exit port, downward the pin through a collar into the barrel.
Some might effort increasing the strength of the barrel spring thinking they could open the valve longer. Non so much, in that location is a collar, a hollow stepped cylinder that pushes the hollow valve stem on one side and gets pushed by the breech end of barrel on the other. This collar just allows the valve to be pushed in about 1/2 a mm. Checking the inside of the valve I found that merely about 1/3 of the leave port was exposed with this little motion. So no thing how strong a barrel leap you lot had the collar prevents it from opening the valve further.
If y'all reduce the length of the collar on the valve side (the larger diameter side) you lot tin increase the co2 output. The valve stem gets pushed further, exit port opened more than and valve open longer. I figured taking off about 1 mm would fully expose the leave port on the inside of the valve.
I took it down about 0.6 mm and it seems actress punchy. Gonna run through co2 faster just I found this guy would yet have tons of co2 after I was done shooting, unremarkably one cartridge would last 3-four sessions.
I need to brand a chronograph and then I can give real numbers.
One might also endeavour enlarging the exit port and id of pin and collar
I promise that's clear enough, if non enquire questions.
Thanks you lot

This can aid?

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• Perugia middle Italy

Hammerli 850 PCP .177
Bottled regulated Prod .22 16,5" Barrell

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Yes, thanks for the parts diagram.
The role I modified is function 28 in the diagram, the larger diameter terminate.
I just chucked information technology in my drill printing and poor human being lathed it almost 0.5mm . It was a piddling rough but merely the id passes gas. I need improve files.
Not a lot of people wanna develop mods for the cheap co2s (at to the lowest degree not like the 13xxs). I suppose at that place's only so much you lot can practise. Each one is different too. I have 3 co2 pistols and each i has a dissimilar mechanism for doing the same thing.
On co2 passing, would a rough path not be better than polish. Counter intuitive every bit most of the time we smooth air paths. Just if co2 encounters friction it creates heat which assists in co2 expansion, dunno any thoughts?

Equally far as "make a chronograph" goes the theory is simple plenty, fast clock 2 triggers and I'g sure I've got most of the parts in my shop already. I've checked out some diy chronys and I'1000 kinda surprised I haven't found an open design project on hither for one... guess I need to make a new topic.

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Never tuned a co2 pistol this kind,but yous still increased valve lift,the only two things left are ensure a better menstruum and increase percussion spring rate a bit.Increase internal valve volume can help,just i don't come across how in this kind of small valves.

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• Perugia eye Italia

Hammerli 850 PCP .177
Bottled regulated Prod .22 16,5" Barrell

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I recollect you modding a co2 pistol is cool. Only a chronograph only costs as much equally your iii co2 pistols so only buy 1 and so yous and the people that read your posts can have faith in your velocity numbers.

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• United States, Pa, Mineral Point

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Frank,

I'm thinking that the fact that he wants to whip one upwardly seemingly like irresolute a CO2 cartridge, leads me to believe someones talents run deep.

Build away Asianshow!!!

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• SE Pa.

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Aslanshow,

I'm new to the airgun scene. (iv years or so) Particularly new to the internals.

Wondering if y'all could provide some guidance in regards to reassemble of the umarex babe desert eagle c02 postol. I performed the mod yous speak of in the beginning post. Upon disassembly, I didn't get a chance to view the orientation of the trigger spring as it came apart while splitting the halfs. Well, the pin came out with the upper half and now I have no idea how this leap fits in. Beloved the gun, it has been flawless so far and I've owned/used information technology for merely over iv years. Fifty-fifty an internal picture of the gun assembled would work. But need a birds middle view of the parts fitment.

Thanks in advance.

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• Canada, Ontario

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