New hpa gun in the pipeline

[proffrink]

Also those airstocks are useless for pneumatic blow-back or HPA GBBR taps as they hold about enough air for <400 shots and replacing them is a PITA when playing (nevermind carrying a spare 13ci bottle about).

I use a MASS on a DMR but would never dream of it on anything else where blow-back is involved (which - if you ask me - is some of the most fun with HPA).

 

[ImTriggerHappy]

Also those airstocks are useless for pneumatic blow-back or HPA GBBR taps as they hold about enough air for <400 shots and replacing them is a PITA when playing (nevermind carrying a spare 13ci bottle about).

I use a MASS on a DMR but would never dream of it on anything else where blow-back is involved (which - if you ask me - is some of the most fun with HPA).

I was thinking more of a UBR style with small pressure vessels on a quick release fitting. Everything us built in and then it is just a case of pop the back.

Needs a lot of looking at but is entirely possible.

 

[Adolf Hamster]

I was thinking more of a UBR style with small pressure vessels on a quick release fitting. Everything us built in and then it is just a case of pop the back.

Needs a lot of looking at but is entirely possible.

hasn't a smaller air tank already been done? i remember hearing about it but then the next sentence was "it has about 2 mid caps full of gas" at which point i immediately lost interest.

i dont think there's any practical way of storing enough gas in a gun without messing up it's looks/balance to make any meaningful volume.

 

[ImTriggerHappy]

hasn't a smaller air tank already been done? i remember hearing about it but then the next sentence was "it has about 2 mid caps full of gas" at which point i immediately lost interest.

i dont think there's any practical way of storing enough gas in a gun without messing up it's looks/balance to make any meaningful volume.

Different concept. 

When manufacturers look at it they work on the basis of can it be done cheap enough. This means that things like cylinders are just generic off the shelf ones. 

I was thinking more on the lines of none cylindrical pressure vessels that are part of the actual stock frame. Pull the back off then quick release for line then then lift three quarters of stock away from bottom half as that is your tank. 

Would only work with ubr or solid stock style as they are pretty chunky designs.

Would be expensive and not feasible for anything like mass production but as an engineering challenge would be fun. And sellable to those with deep pockets.

 

[Adolf Hamster]

Different concept. 

When manufacturers look at it they work on the basis of can it be done cheap enough. This means that things like cylinders are just generic off the shelf ones. 

I was thinking more on the lines of none cylindrical pressure vessels that are part of the actual stock frame. Pull the back off then quick release for line then then lift three quarters of stock away from bottom half as that is your tank. 

Would only work with ubr or solid stock style as they are pretty chunky designs.

Would be expensive and not feasible for anything like mass production but as an engineering challenge would be fun. And sellable to those with deep pockets.

whilst i get what you're saying, i doubt it'd go anywhere, pressure vessels are cylindrical for good reasons, especially when we're talking the kind of pressures involved in hpa, there's a big difference between keeping 800psi of co2 stored and 3000+psi of air.

plus you'd still have the problem of a lack of capacity, and you'd be carrying a bunch of spare butt stock sections which tbh sounds less practical to me than an airline.

the only other sensible place to put gas is in the magazine, needless to say that's been done already and the benefits/drawbacks are well known.

 

[proffrink]

CO2 is fine but requires a decent expansion chamber. If this could somehow be done inside the receiver then having all that stock space for a CO2 bulb could make it viable again. I agree that HPA is out on anything smaller than a 13ci bottle.

 

[Adolf Hamster]

CO2 is fine but requires a decent expansion chamber. If this could somehow be done inside the receiver then having all that stock space for a CO2 bulb could make it viable again. I agree that HPA is out on anything smaller than a 13ci bottle.

thing is if your using co2 then why not just stick it in the magazine? seems the most logical place for it given it'll get swapped out anyway.

perhaps maybe a market for a green gas/co2 line of guns that use a solenoid hpa style system rather than good ol' blowback to give greater gas effeciency. sure it won't go bang like a gbb would but you'd be free of a tether.

see using gas is a tricky proposition, thats why i hedged my bets into looking at purely electro mechanical systems for my project.

 

[ImTriggerHappy]

whilst i get what you're saying, i doubt it'd go anywhere, pressure vessels are cylindrical for good reasons, especially when we're talking the kind of pressures involved in hpa, there's a big difference between keeping 800psi of co2 stored and 3000+psi of air.

No shit, being an engineer with lots of experience of pressure vessel manufacture and air systems think I have it covered though ?. As I stated it is not a feasible thing for manufacture but an a personal project so not expecting it to go anywhere other than personal use as costs would be very high.

Made vessels in all sort of shapes because sometimes cylindrical is not feasible. It would not have the capacity of a average tank and last all day but enough to play a game or two and swap between.

 

[Adolf Hamster]

No shit, being an engineer with lots of experience of pressure vessel manufacture and air systems think I have it covered though ? 

Made vessels in all sort of shapes because sometimes cylindrical is not feasible. It would not have the capacity of a average tank and last all day but enough to play a game or two and swap between.

Maybe if it was something like a full m16 stock's worth of volume but if your doing it enough to last a game it'd be better to have it refillable than quick change.

Its not impossible but as you pointed out at the start it'll be expensive and i dont see how it offers much over an air line, most folks run slings anyway and if you're that dead set against being tethered then youre either after realism (which puts non gbb's off the table) or youre probably going to settle for an aeg like the rest of us.

 

[ImTriggerHappy]

Maybe if it was something like a full m16 stock's worth of volume but if your doing it enough to last a game it'd be better to have it refillable than quick change.

Its not impossible but as you pointed out at the start it'll be expensive and i dont see how it offers much over an air line, most folks run slings anyway and if you're that dead set against being tethered then youre either after realism (which puts non gbb's off the table) or youre probably going to settle for an aeg like the rest of us.

Because air lines snag and break and tanks have to be carried on belt or back. Started out as an idea with a speedsofter because they are always looking at removing anything that encumbers them. 

Realism is never my concern and I have already pushed an aeg as far as possible so always looking for something new.

 

[clumpyedge]

I saw one where the line was running with the sling and it worked really well.

Stock tanks are the way forward. Might try and make one that looks like a normal stock.

Have you seen the most recent incarnation of the (i think) tippman? Might not be tippman but I know a Rif has just been released that incorporates a small buddy bottle as the stock.

No that is fucking horrible.

This is apparently the redline version although a quick google also showed a G&P one.

 

[proffrink]

G&P don't do an airstock. Redline don't make guns. What do you mean? :S

 

[clumpyedge]

G&P don't do an airstock. Redline don't make guns. What do you mean? :S

Just the info that came up when I googled HPA stock...

http://www.highpressureairsoft.co.uk/store/c37/Red_Line_Airstock.html

http://www.redwolfairsoft.com/redwolf/airsoft/HPA_G_P_G_P_M4_Jack_12_inch.htm

 

[proffrink]

That's a Polarstar stock. I see what you mean though

 

[clumpyedge]

That's a Polarstar stock. I see what you mean though

Ah fair enough, look interesting either way but I cant see a buddy bottle lasting that long?

 

[proffrink]

Yeh, this is what I said earlier in the post - on solenoid engines they can last up to ~1000 shots, but on anything interesting they're nearly useless. I use one with a Mancraft fully pneumatic engine for a DMR and it lasts maybe 600 shots (which is fine for a DMR), but there's just no reasonable way to store that much power in a stock without using CO2

 

[Prisce]

No shit, being an engineer with lots of experience of pressure vessel manufacture and air systems think I have it covered though ?. As I stated it is not a feasible thing for manufacture but an a personal project so not expecting it to go anywhere other than personal use as costs would be very high.

Made vessels in all sort of shapes because sometimes cylindrical is not feasible. It would not have the capacity of a average tank and last all day but enough to play a game or two and swap between.

Sounds like we could be in similar industries... if you find a hole in stock items, let me know, I can probably get ahold of whatever your after.

 

[clumpyedge]

Yeh, this is what I said earlier in the post - on solenoid engines they can last up to ~1000 shots, but on anything interesting they're nearly useless. I use one with a Mancraft fully pneumatic engine for a DMR and it lasts maybe 600 shots (which is fine for a DMR), but there's just no reasonable way to store that much power in a stock without using CO2

Sorry mate, skim read majority of it

 

[proffrink]

I don't blame you

 

[Seth_Erebor]

I saw one where the line was running with the sling and it worked really well.

Stock tanks are the way forward. Might try and make one that looks like a normal stock.

Will you be using Solidworks or something similar?