My Dumb Projects
Monday, April 11, 2005
  Logan's Run Sandman DS (Deep Sleep) Gun

This gun is from the 1976 sci-fi film "Logan's Run". I was able to find some very detailed plans online, including WORKING acetylene blasting models (as in the film)! I used plans from the original prop maker, Richard Coyle. It's rare when you can find any sort of detailed specs, so this was a joy to work on.

First, I cut out the grip halves and trigger according to the plans. I used .08 sheet styrene laminated to build the right thickness. The muzzle was cut out of PVC and beveled on the end by attaching it to a drill, turning it into a makeshift lathe.

I wanted to be able to pull the trigger so I took a spring from a crappy ball point pen and inserted it under the trigger (deviating from specs).

The Receiver tube and gas cannister are stock PVC parts cut to size. There is a small barrel hidden within the muzzle shroud...for that I used the barrel of an old dried up marker. The knob at the end of the gas cannister is laminated styrene. The stage came together pretty fast, so I don't have photos of the assembly.

I then airbrushed the interior of the muzzle. For final painting with spray paint, I didn't want to miss or overpaint any of these confined areas. The receiver tube was epoxied to the grip and puttied to hide the seam. I cut out the grip plates from sheet styrene and sanded them to shape.

I masked off the trigger and the interior of the muzzle and gave all the parts 5 coats of primer, sanding where needed.

I made the ignition plug (below the muzzle) according to the plans but it just looked like a spark plug. Since mine didn't have to work, I scrapped the part and rebuilt it using a plastic wall anchor and a metal dowel. It is the same size as the original part, retains the spirit of the original but looks more futuristic.

Same situation on the arming switch in front of the trigger. The original plans call for a toggle switch. I adapted a bolt for a decorative substitution.

The final paint for the grip plates was Krylon gloss black (many coats). The rest of the gun was painted with semi-gloss black (Also many coats). Krylon suggests that spray paint be given 5 to 7 days to cure, so I waited to epoxy on the grips. The grip plates look strange only coming up halfway, but I was surprised how comfortable they were when assembled! Very solid hold and a ambidextrous thumb rest.

How many layers of .080 did you use to build up the gip frame?
I believe it was 6 or 7. I was matching the .5" thickness that was specified in the plans.
This is great!

I'm going to try and make one now!
Wow, I have wanted to do the same thing, and now I have seen your gun, I know that I can give it a go.
Wow!! Would love to see the progress on the life clock mount that you made for this. Will you do a tutorial on that as well?
That's nice. I'm really keen on making a working gas powered one. The valve in the original has me stumped - so I was thinking of using a Schraeder style valve instead.
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These are all the dumb things I find myself obsessed with building when I SHOULD be doing something more productive.

As a kid I built lots of plastic model kits, never knowing that one day those skills would actually be of use.

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Location: Phoenix, Arizona, United States
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