Logan's Run DS Gun - TV version

[Rylo]

By nature, all gas is volatile and can explode; ergo 'combustion in 'combustible.'

Not to marginalize acetylene in any way, but miners have worn it on their heads for over 100 years. That said, of course anyone and everyone should exercise extreme caution working with any gas. NOTE: Calcium carbide yield fluctuates wildly from manufactures and one should exercise extreme caution when working with new brands. Remember, the reaction (creation of acetylene) is instantaneous once H20 is introduced.

The difference with regard to this prop is the quantity and control...The genius of Cramer's design is how much we're talking about with regard to yield per tank. Small amounts are placed under extreme pressure providing the desired result. Oxygen flow within the prop via venturi-holes is what allows the gas to properly arc over the glowplug. Without the proper environment within the prop, you'll just have black clouds of smoke after the initial ignition. This is a primary hurdle for many an individual who've attempted to manufacture these pieces themselves.

However, I digress. Not my intent to give a chemistry class or anything. Just figured since I know a little bit about this piece I'd share. My main intent was to simply suggest, 'butane' really makes for a poor effect.

I make it a point not to discuss this props 'particulars' any further with regard to manufacturing.

Keep it safe!

I've always been a little cautious around Acetylene. I actually went to school for welding back in my teens and Oxy-Acetylene is where everyone starts, gas welding. Like everything else, we had one or more idiots in class. One student decided to fill a Coca-cola can with Acetylene and put it inside a booth where another student was stick welding. Being that Acetylene is denser than air, it stayed in the can. Long story short, some molten slag dropped into the can while the the guy was welding. The result was a nice size fireball and loud BOOM similar to an M80 going off. The instructor was not amused and all the students involved in the prank were never seen in the class again after that.

I have both MiG and TiG rigs in the garage. I sold my Oxy-Acetylene rig and got a plasma cutter for cutting metal.

So use caution when messing around with any flammable gas, especially gas that can explode violently.

 

[Rylo]

Richard has a screen used one taken apart on his site with a ruler laying next to it. Racprops.com
What more do ya want? :confused

I doubt you'll get anyone with a working replica prop to share their measurements with you. You're talking about a tremendous amount of effort and reverse engineering is frowned upon around here...why not do your own homework like everyone else had to do if you're concerned about numerous 'contours?' Just saying you're request for info is exceeding basic measurements and getting into the, pretty damned precise category. If you're not finding what you need by way of what's already been suggested, it's time to dig in and do a little research, my man!

Good luck just the same.

NOTE: I've handled a few screen used flameguns over the years and measurements do in fact very a little from piece to piece. Regardless, go with what's on Rich's site; I'm sure you'll be just fine.

I have one of those bluprints. I tryed to serch for more blueprints but all I could find is one frame on a now deleated file.
View attachment 275716

The best thing I can think of, in geting mesurement bluprints, is to ask somone here who has a working prop & messure it's many contours.

 

[Apollo]

Amazing how the same old "quack" info gets posted over and over about this prop. :lol

Anyone who thinks this can be done with butane or is an easy prop to do have no understanding of the nature of this beast.

Never hurts to dream though!

 

[Delmustator]

I wouldn't say that it cannot be done with another flammable gas, it can if engineered correctly.

But I agree with Rylo, why bother with butane as the resulting effects would probably be underwhelming at most. You want the same effects of the originals.

If you really want a working flame version, get with Rylo before there all gone forever.

 

[Wheatbee]

Good advice!,I'm following it myself! Looking forward to being amongst the owners of the finest Flame Gun prop out there. Rylo is wonderfully talented and a real straight shooter. Love this forum, I've learned a lot!