Flippers are great

[simon]

Sealy now do a refillable mig bottle
http://www.justoffbase.co.uk/s.nl/c.317638/sc.9/it.A/id.7170/.fhttp://www.justoffbase.co.uk/s.nl/c....t.A/id.7170/.f
Dont know if its of use for bots though.

[jeremy_cuss]

Ive bought two 0.8 litre (20 fluid oz.) CO2 buffer tanks on Ebay - just search on CO2. You will find a range of bottle sizes, and quite a lot of choice. Those up to 20 fluid oz are for paintball applications, and the larger ones are usually fire extinguishers.

[beast]

ok would like to ask can i use a 5kg bottle ?

making a new robot as mines scap now
i am not building to gain extra co2
building its easyier to swap 1 bottle than 2
if its a weight problem it will be under 102kg so no cheating etc etc ??

thanx in advance

[woody]

John,
You can I believe use whatever size bottle you want ... BUT ... your only allowed 2 kg of free co2 ....the other 3 kgs will be considered part of your total bots weight at the weigh in.
This means that your bot must weigh in at 3 kg under the MAX weight limit.

BTW .... I have some 3.5 kg fire extinguisher bottles should you wish something a little smaller.

[maddox]

Marco in Hades used a 3.5 kg bottle (5L volume) during the championship 2006.
But with a filled bottle the robot cannot be heavier than 102 kg (+ the 2% messuring error allowance)

Bottlesize in the FRA rules isnt an issue, only the suitability of the pressure vessel.

Commercialy available, certified for the used medium and a pressure limit imposed bij the rules of 70 bar/1000psi.

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The disadvantage of sodastream bottles is the fact they dont have an on/off valve, but a pin valve. Other problem is the kind of connector on the head of the bottle.


Paintball bottles can be bought with an on/off valve. Are available in handier formats and have an easier available connector and filling system.