SPARC Forum

Events => North America => SCRC (Saskatoon Combat Robotics Club) => Topic started by: FingerTech on June 01, 2015, 04:42:07 pm

Title: Flamethrowers?
Post by: FingerTech on June 01, 2015, 04:42:07 pm
If we want to be more entertaining to an audience, fire is the way to do it.
Thoughts on allowing it at Kilobots events?
Title: Re: Flamethrowers?
Post by: ACME on June 02, 2015, 07:21:08 pm
I think it would be sweet. We'd just need to figure out details: amount of fuel allowed, safety shutoff, safety in case of explosion, make sure the arena was fireproof (I'm thinking of the small space between doors and the plywood pushout floors). Anything else we'd need to do before this could be a reality?
Title: Re: Flamethrowers?
Post by: FingerTech on June 02, 2015, 11:27:43 pm
From the SPARC docs:
16.2.1. Fuel must exit the robot and be ignited as a gas. It cannot leave the robot in a liquid or gelled form or use oxidizers.
16.2.2. Fuel types allowed are propane and butane, the maximum quantity allowed is 4 fl oz in robots up to 30 lbs, 8 fl oz for robots 60 lbs and above.
16.2.3. The fuel tank must be as far from the outer armor of the robot as practicable and be protected from heat sources within the robot.
16.2.4. The ignition system must have a remotely operated shut-off that allows the operator to disable it using the radio control system.

We could just go with that and see what happens.
For the arena, I've got some angle aluminum we can mount in front of the door slides.
Title: Re: Flamethrowers?
Post by: Travis7s on June 04, 2015, 02:51:20 am
I'd be fine with it.. Cover the plywood area with alum flashing, be ready on the draw with extinguisher. The biggest issue is probably venting smoke into indoor venues. Also the flamer builder would be responsible for cleaning residue if applicable, similar to ICE bots that nobody has.
Title: Re: Flamethrowers?
Post by: thesaxmachine on June 04, 2015, 11:00:17 am
FIYAHHHHHH
Title: Re: Flamethrowers?
Post by: FingerTech on June 04, 2015, 01:36:02 pm
Can we add smoke scrubbers/filters over the exhaust fans?  Does that exist?
Title: Re: Flamethrowers?
Post by: thesaxmachine on June 04, 2015, 05:46:21 pm
There is such things as air scrubbers.  I have made one for the laser cutter.  Depending on what you have moving the air around it can be pretty noisy.  But be careful doing google searches for DIY air scrubbers you get directed to certain hydroponic forums.
Title: Re: Flamethrowers?
Post by: Travis7s on June 05, 2015, 06:52:22 pm
Kurtis, you have one of those soldering fume extractors? If we just mounted the same style of filter over our fans would that be sufficient?
Title: Re: Flamethrowers?
Post by: FingerTech on June 06, 2015, 12:45:44 pm
Yeah I do have a solder fume extractor, and you can buy replacement filters (B&E or Digikey maybe?).  It's loud because the fan has to suck all the air sideways before it wafts up above it.  Since our arena is a closed system with two fans in and two fans out it should be easier.

How can we easily fill the arena with (clean) smoke to see how fast it evacuates?
Title: Re: Flamethrowers?
Post by: Travis7s on June 06, 2015, 04:09:48 pm
Stabbing a li-poly would be the most accurate simulation. :P
Title: Re: Flamethrowers?
Post by: Travis7s on June 06, 2015, 04:16:11 pm
Also, other ways to be more entertaining:

- build more robots

-build robots with weapons *coughkitbotandzimcough*

- have dedicated demo bots to fill in when we've had a block of wedge fights. One thing I want to do is build a beetle/mantis bot that is just for smashing electronics and whatnot. vertical sawblade, big battery, simple and reliable. Its not for fighting other robots so weight or armour don't really matter.
Title: Re: Flamethrowers?
Post by: needmorercs on June 06, 2015, 07:32:32 pm
paint ball smoke grenade would work for testing
Title: Re: Flamethrowers?
Post by: FingerTech on June 08, 2015, 06:23:37 pm
I say we try the paintball smoke grenade then, unless Travis really wants to do a lipo.  I've got some unusable ones to stab here.

Regarding more robots, that belongs in that other thread where I posted a list of ideas that no one responded to.
Title: Re: Flamethrowers?
Post by: thesaxmachine on June 09, 2015, 11:10:17 am
Don't you have a fog machine Kurtis?  That would work too.
Title: Re: Flamethrowers?
Post by: FingerTech on June 09, 2015, 12:10:03 pm
The glycerine coats everything.  I made the mistake of running it in my house and everything was slippery the next day.
Title: Re: Flamethrowers?
Post by: GuavaMoment on September 01, 2015, 12:39:43 am
Didn't notice this thread until now or I would have posted in it. I was originally planning on talking to you guys at the next event about this. So! I can remake the frame of Limblifter and save a couple of ounces. I bought a micro torch and took it apart to figure out how it works. I think I can make a flamethrower in only a couple of ounces. I know it's not allowed currently, but I'd love to be able to make a flamethrower for future events. I know it's not really an effective weapon, but I'll trade a few ounces of armor for making the crowd happy.
Title: Re: Flamethrowers?
Post by: Travis7s on September 02, 2015, 09:39:26 pm
Unfortunately I think we decided against flames again. We did some actual flame testing and its tough to keep the lexan from getting scorched. We are getting fresh lexan installed (for the first time ever?) so we want to keep it in prime shape.
Title: Re: Flamethrowers?
Post by: GuavaMoment on September 02, 2015, 10:14:13 pm
That's fine then. I can imagine how much of a hassle and risk it could be to allow.
Title: Re: Flamethrowers?
Post by: TDS on September 03, 2015, 03:35:31 pm
I would add one additional rule that there can't be a line of sight from the nozzle to an uncovered motor can to prevent motor sparks from igniting a theoretical spill, or something with that sort of idea.
Title: Re: Flamethrowers?
Post by: Travis7s on September 04, 2015, 12:16:26 pm
The nozzle is going to have the igniter right next to it, so a motor sparking is going to be the least of your worries.

The arena and the fuel limit should be sufficient to keep things from getting out of hand if your robot blows itself up. Also the safety inspection should not allow any shoddy flame designs through...