Penu question

[guy_with_a_gun]

i have a few pneumatic cannons atm, but i still cant answer this, does having the chamber not directly behind the valve make a noticible differnce in power? and wiht that, i also need to find a more sutible souce for air, the car tire compressors arent going past 60psi for me... and i dont really wana buy a 200 dollar compresor either...


plz help

[Tyro]

in australia you can buy a compressor for about 95 bux, which is us dollrs would be like 75 bux maybe, i'm not usre where your from, but if your australian go to bunnings!


And can someone tell me if there is a difference between PVC glue and Cement, because i went to the hardware store and only found PVC Cement?

[noname]

Dude, seriously, have you ever used a bike pump? I can get mine up to 160 psi with mine.

And Tyro, they're exactly the same, just a different name on them.

[tntlly]

the car tire compressors arent going past 60psi for me... and i dont really wana buy a 200 dollar compresor either...

how big is your chamber? i had a big chamber and couldn't seem to get past 60 psi either, so i made a smaller chamber and it fills up faster because there's less volume, and it doesn't stop at 60

[Tyro]

cool 160 with a bike pump that sounds pretty good!
And thx for the clearing up about cement and glue.
OHH even if it's the same thing, is the liquid still the same consistancy, or is the cement thicker?

[Hotwired]

If you're after 160psi look for track/floor pumps.

I'm uk and I can get http://www.wiggle.co.uk/Default.aspx?Ma ... &UberCat=0 for £15 delivered.

[Recruit]

I can get industrial compressors for 60 euros here

[joannaardway]

I also picked up a bike track pump for about £15 in the UK, which will do 160 psi at a pinch.

8 bar (112-120 psi depending on exact make) compressors can be bought for about £80.

A much meatier 10 bar one costs about £250, but it it provides air much faster, and does more pressure.

To answer the other question, Inline and Over-Under launchers (I'm sure you can work out which is which) display almost exactly the same power in pneumatics, if they use the same "conditions"

Most inline pneumatics are triggered by a ball valve or sprinkler valve, neither of which are hugely powerful, but both have their ports "inline"

Over-under launchers often use more powerful valves such as QEVs or piston valves, which yield a lot more power, but go through a 90 degree bend, so it makes sense to construct them in an over-under rather than inline set-up.

However, if they use an identical valve to an inline, then the difference is miniscule, and is more than made up for by the reduction in length.

However, the "average" over-under will out do the "average" inline, simply because of the more powerful valves used.

There is another launcher type known as co-axial, where the chamber is around the barrel, and these are almost exclusively used with piston valves. Comparing it to the other types, it's most like an over-under.