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Jaxom · Senior Member

This morning while drinking a cup of coffee I was adding some additional notes to my AG notebook. Then dummy me knocked over my cup of coffee ruining the note book!

I've spent most of the day re-entering all the different notes and such. But are a few tid bits I'm missing.

For example, in general, pistol and rifle forums we've had serval conversations about which is the best or most powerful hammer spring to be used on the 22xx ag's. Correct me if I'm wrong but I believe it was Fritz that bought several different model's hammers springs and then tested them. The end result being that the discover hammer spring was the most powerful. My question then was, if replacing the hammer spring, since this works in sync with the valve spring and how much Co2/hpa flows through the valve, should this be replaced as well. I can no longer read my coffee flavored answer on that page, can someone clarify please?

The only other question I have, is one that I had written down by never got around to asking in any of the forums. This has to do with that youtube video of the "mechanized" hand pump posted a bout a month ago. While I have come up with my own unique design, the question I didn't ask is about the foot pump it's self. Having looked over many ag related websites that there are a few different brands of foot pumps. All seem to be around the same retail price of $200. But what I'm wanting to know is any brand better then the next? Or is this a case of one company building these pumps and then putting different brand names on them and each ag company selling them as an accessory?

Anyways, I think that should do it for now. Now I have to go back and re-draw all my "concept" items I've been thinking of. One of these days I swear I'm going to find simple to use cad program so I don't have to hand draw everything!

Thanks!

Jax

Crosman140 · Senior Member

I might suggest you invest in a digital notebook...er...some call it a Notebook Computer. Smile

You could then type the notes and if you want a printed copy...print. This is how I catalog all of my airgun info and everything else I do for hobbying and business.

Of course, if you spill your coffee on it, your out $500 instead of $1.50 lol Laughing

fritz · Silver Status Member

Wasn't me who bought any hammers or hammer springs.

Hill pumps. They are said to be the best as if they should break you can easily fix them yourself. Hill pumps are also able to get up to 3200psi IIRC, at least 3000.

Alstone · Moderator & Site Supporter

Hey Jaxom why not keep your notes on the computer you use to access this site, all you need to do is copy and paste, then save it to a memory stick?

Al

rsterne · Moderator

I made the post about the hammer springs.... Disco> 2200> 2289> 2240

You don't have to change the spring inside the valve as well.... The two work together but in opposite directions.... A weaker valve spring makes a pumper (13XX / XX89) a bit easier to pump for the first few pumps, and in both 22XX and 13XX guns it makes it dump a bit more gas / air and again on a pumper, it therefore retains a bit less.... I find a weaker valve spring allows the valve to open quicker/further, and so it boosts velocity a bit in the "mid-range" on a pumper.... ie same number of pumps gives a bit more velocity.... Cool

The hammer spring is much more effective in controlling the maximum output of the gun.... In a pumper it allows more pressure (ie more pumps) before the valve retains air, and therefore a higher maximum velocity (at more pumps).... If your hammer spring is too strong, you won't be able to pump the gun at all without pre-cocking it, because the strong hammer spring (particularly if coupled with a weaker valve spring) holds the valve open with no air in the valve.... Shocked

On a 22XX gun, they waste CO2 at such a horrific rate in stock form, I tend to use a stock 2240 hammer spring and adjust the tension DOWN.... This results in a flatter shot string and more shots per cartridge.... along with a quieter report.... You can gain velocity much more efficiently by increasing the transfer and barrel port size and rounding the corner of the exhaust port in the valve.... but only in .22 and larger calibers.... I find that .177 works better without major port modifications.... YMMV of course.... Wink

Bob

AirGunEric · Site Admin

There is a "search" function here! So for a man with broken fingers, he won't have to take notes...

Jaxom · Senior Member

Thanks guys for all the help!

Fritz, bob, sorry about the confusion.

re: computer note booking. While it's true most of the written ideas, suggestions, comments could be c/p'd to wordpad or even word it self, the majority of my notebook was diagrams I'd free hand drawn for certain things I wanted to build. I have yet to find a simple cad program that is realitivly easy to learn, or I'd save those on my computer as well.

Eric, I'm well aware of the search feature, I used that to complete many of the stuff that I'd lost before asking those two questions. Of course I couldn't search the second one, I had only made note to ask that in my notebook and had forgotten to ask around here.

Crosman140 · Senior Member

scroller99 · Veteran Member

Google sketchup is a free download and really easy to use it comes with tutorials, I use it at work all the time to sketch out my renovatons that I am doing, you really should try it.

Jaxom · Senior Member

Being that I'm into welding and such, I should really sit myself down and learn something like turbo cad or something simlar.