Mist / Fire Extinguisher Test

Well I’m back working on R2. It’s been a while since I’ve done anything on him and I’ve still got a long list of big to-do’s. Sadly, instead of working on the small things I’ve been avoiding everything.

Inspired by reading Victors success with the Mist/Fire Extinguisher effect this week I decided I’d give it a go this weekend, hoping it would kick start me going back to work on more difficult things like the skins.

The mist is created by an inverted can of compress air normally used to dust PC’s and office equipment. When it’s inverted rather than spray air, a watery/icy mist comes out.

I decided to put the air cannister and output in the dome instead of the body. I really liked the idea of popping open a dome hatch/side panel and having something come out, and I thought this would be perfect.

I’d already bought a cheap solenoid which was part of a trunk release kit I found on eBay. I had looked locally, but eBay seemed to be cheaper. Wiring it in was a snap and it’s only a few wires. It’s triggered with a spare channel on my RF remote.

I cut a 1 1/2″ acrylic strip and bent it into an L shape. I bolted it to the Dome Mounting Ring and then used clamps to hold the cannister and solenoid to it.

I drilled a small hole in the trigger of the air cannister and connected it to the solenoid with a bend paper clip.

Here’s a rough diagram of how it’s wired

Space in the dome is tight and I’m sure I’ll need to move things around or lower/angle the cannister more to accommodate the periscope lift mech.

Here a short movie clip of the first test with the dome off

Then with the dome on

I still need to add a hinge to the hatch and power it with a servo. I did tinker a bit with the Robart hinges but decided to leave this for tomorrow.

Posted by Chris on August 4th, 2007 in Dome, Electronics | 1 Comment

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One Response

  1. Bob Ross remarks on


    Really neat !!! That’s a great effect.

    Can’t wait to stop screwing around with the 2-3-2 stuff so I can do some more fun things like what you did.


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