pneumatics for featherweight

[Liftoff]

http://www.ebay.com/itm/New-Paintbal...item5b035321c4

There you go, at 19$ if that ain't cheap then I don't know what is!
I prefer a Co2 fire extinguisher as a supply tank, once it empty I give it back to the supplier and he just refills it.

[Rahulvyas]

Yup ok
I will get the things then will update this thread, thanks

[Rahulvyas]

Okay, i bought the tank( it weights 1300g non filled and 1700g filled), made of steel, and has testing pressure rated at 250bar, bought from a soda machine vender for 5$(pretty cheap)
so 400g of co2.
Now any modifications i need to do?

[Liftoff]

Wow! So you're building a 6kg robot and get yourself a 1.7kg tank! As I previously explained, you don't need a tank that big/heavy, a 1/2 kg of liq co2 will last a lifetime for the size of ram you plan to use. Also as I have already told you, the thread on a soda bottle is unusable, you need an adaptor like this:
http://www.ebay.com/itm/Sodastream-B...-/161034825292
which will cost you more...in the end, it would have been cheaper, better, lighter, smaller to get a 9oz paintball tank!

[Rahulvyas]

haha no i dont have to buy that, I think I will get some welding done for the fitting I need...
In india we have to make the stuff ourselves, not everything is available here

[Rahulvyas]

if i change the valve of the soda cylinder, will it be fine?
maybe i would replace it with the fire extinguisher one, or maybe the paintball one?

[Liftoff]

I dont know, never used or disassembled a soda bottle, maybe someone else who did could give you some advice. But I strongly advice you against:

get some welding done for the fitting I need

[Rahulvyas]

ohk, i will get some fitting then ( if you dont recommend me getting it welded)

[Niels - Team K.a.L.M.]

I have one of those soda cylinders and the thread on the bottle differs from manufacturer to manufacturer.
So it's not simply a matter of screwing a different valve into it (Which was my wish).

Perhaps to person who sold it to you can help you out with your questions and parts.

[Rahulvyas]

the threading in mine one dosnt seem any special, its normal .. i also have some fitting for it, which cud help? also the pin valve is very difficult to press with fingers(impossible) , so will it be any trouble?
i will upload a pic