Some Queensland roboteers would have heard me talk about my new robot. It is designed to completely destroy any robot that it faces. The weapon system is completely different to any other that I have heard of. It uses liquid nitrogen to freeze the opposing bot.

I accidentally came across this new weapon idea while trying to overcome the cryogenic properties of CO2 in Marauder. Those present at the House of Carnage may remember the CO2 bottle freezing when the gas was dumped.

Mike from Australian Cryogenics helped me find a suitable pipe after my first one failed. Mike took an interest in robots and was prepared to help me when I asked him how you could freeze a robot at long range. The CryoCannon could not have been made without his generous donations of time and equipment.

AF, Absolutely Freezing, shoots a stream of liquid nitrogen up to 1.5 m, or until it hits a robot. The liquid nitrogen quickly expands into 700 times the volume of gas taking the opposing robot down towards -200 C.

Many metals, polymers and rubber become as brittle as glass as they cool. Some readers may be familiar with glass transition. The wheels an drill gearboxes will become as brittle as glass and shatter due to their own momentum. The bushes in motors will shrink and seize motors. Polycarbonate robots will die, sorry Daniel. Saw blades should shatter with spectacular results as will other high carbon steels.

AF will also freeze batteries and stop them working. Batteries may recover as they warm or they may need to be replaced.

Rapidly chilled Fets from drill triggers have cracked in tests. The IBC might survive due to it’s higher thermal mass. I don’t want to spend $315 just to see it being destroyed in a test. We will find out in the next event.

The only downside is that, due to weight considerations, AF will has no armour. This should not matter as no robots will reach AF.

Many roboteers have stated that they love destruction in robot battles. I hope that my little AF creation will make them happy.
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So even the rain that falls isn't actually going to fill our dams and our river systems

extremely interesting idea there phillip but i swear theres something in the rules abuot that sorta weopon i think.
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Andrew Welch, Team Unconventional Robotics

There are several rules about free liquids; I don't think squirting liquid nitrogen would be allowed in any bot competition in the world...
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Your pushing it a bit Philip.
You said you read the rules at the last event but what abot this from the RFL rules?

12.2. Weapons that require significant cleanup, or in some way damages the arena to require repair for further matches. This includes but is not limited to:

12.4.1. Heat or fire weapons not specifically allowed in the Special Weapons section 13.6 (would freezing a robot be described as a "heat" weapon?)

12.2.2. Foams and liquefied gasses


but I suppose it is all up to the event organiser anyway.

Hmm. I will have to look into thermal shielding.
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Get Some!!!

Secretary of the Queensland Robotics Sports Club inc.

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Originally posted by Philip Taylor:
Polycarbonate robots will die, sorry Daniel.

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Liquid will never touch the floor.

Spinning saw blades will shatter. That will be spectacular.

We will have to seal the bottom of the arena as there is a real possibility of freezing a limb.

I will see if Mike can set up for a photo tonight to show the spectacular cloud as the liquid nitrogen stream hits warmth. We might be able to set up a display out in the padock, away from people, on Sunday with the Big Guns.

Would you kkeerroos be interested in destroying one of your saw blades for thre demo?
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So even the rain that falls isn't actually going to fill our dams and our river systems

Sounds real dangerous, and something more suited to american comps, where you do't care if you completely trash someones bot. Keep in mind that not many people would see this type of destruction, so it's kinda similer to weapons like tazers (banned).
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I'm not sure how

quote:

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Liquid will never touch the floor.

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quote:

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We will have to seal the bottom of the arena as there is a real possibility of freezing a limb

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Hmm, its a very interesting concept.. absolutely skirting the edge of a few of the rules, but I cant see anything that is a blatant violation of them..

quote:

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12.2. Weapons that require significant cleanup, or in some way damages the arena to require repair for further matches. This includes but is not limited to:

12.2.1. Liquid weapons not specifically allowed in the Special Weapons section 13.3. (Also, a bot may not have liquid that can spill out when the robot is superficially damaged.)

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quote:

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12.6. Hazardous or dangerous materials are forbidden from use anywhere on a robot where they may contact humans, or by way of the robot being damaged (within reason) contact humans.

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I seem to remember that at a science demonstration, liquid nitrogen could be thrown (in small quantities) at a person, and it would turn back into a gas due to the body heat of the person, this gas stopped further liquid from reaching the person. Similer to the fact that you can cover your hand with water, and quickly dip it into molten lead without it burning you. the vapour of the water makes an exelent insulator.

However because you claim it would cause significant damage to peoples robots, ESPECIALY polycarb ones, it seems it would cause the same damage to the arena... Also keep in mind that most arenas have lots of sensitive accessories like lights and (in the possible future), active obstical mechanisms.

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Last edited by dyrodium on Fri Apr 07, 2006 11:38 pm; edited 1 time in total

im not a qualified chemist by any means, but heres my input.

the reason why gas engines arent allowed in our arenas is lack of positive ventilation... if you go in the arena after a fight you will probably be asphyxiated by the CO gas from the exhaust.

i wouldnt mind betting if you go into the arena after a fight with this thing spughing N gas around youll be choking to death.. but as i said im not a chemist so god only knows if thatll happen... but one would assume it would.

12.2.1. Liquid weapons not specifically allowed in the Special Weapons section 13.3. (Also, a bot may not have liquid that can spill out when the robot is superficially damaged

^^ would not that instantly disqualify the weapon, as the N2 comes out of the robot as a liquid..

check 12.2.2 as well, im not sure how to copy and paste from the rfl rules thingy.

i guess if it does what you said to steel and polycarb robowars and marayong arenas are totally out of the question for it to fight (blasting the wood sides at the OC arena wouldnt be conductive to its well being either).
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www.demon50s.com - Minimoto parts
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I've got something that might stand a change.... One good thing though, your weapon will be it's own greatest weakness, when firing liquid NO2, your barrel will also become very brittle
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https://www.halfdonethings.com/

not if he kept it inside something to protect it from hits.
i agree with dyrodum i've acutally had liqued nitrogen drip on my hand at a science demo and i just jumps around like crazy and feels like cold water.
you would probably have to pin/hold a bot still enought to be able to hold the spray on long enough to cause enought damage.
consider an injecter so insted of spraying the bot a needle like spike goes in and sprays the insideswith the liquid (nitrogen,petrol,water?) .
that's what was going to be my idea in the latter parts of my bot building
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For West ausies interested in robotics email me at: theoneshrug@hotmail.com
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best quote ever:: "Those Gas-Turbine style warehouse heaters arent illegal, and neither is remote controlling one as far as I know."

That's banned too, you can't have liquid weapons, all rules disallow them! Just stick with a flamethrower!!!
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Mmm ive had this strange idea of putting an umbrela on my next bot lol must have been intution .....