DS Flamegun Logan's Run, Functional or not ? I need Help of specialists

See there! Good job. Congrats on getting a good one. Like I said, sometimes you can find one that's never been messed with. I'd continue to load small to protect the valve.

-Rylo

I made it ! And it's working perfectly !
I was tryed without glow plug with Calcium carbide. I was saw that the trigger control the gaz pressure. So, I'm not hesitated, just after I was loaded with a little quantity of Calcium Carbide and with protection I was shoot ! Great work ! :thumbsup
If I can, I put somes pictures or video soon... Thanks for all for yours tips and answers ! :)


If it's not a big work for you, I say Yes ! Beforehand, Thank you very much !
 
Love it!!! It's all good man. If that thing isn't shooting flame out of the back of the gun (towards you) you're in good shape....for now. :confused

I keed, I keed. Just be cool with it and treat it like an old car. It's an antique! But, a working one which makes it all good.

By the way. Should that glowplug crap out on you, a FOX 1.5 long is what you'll need. I 'd also change the felt in the filter tank every 9 or 10 loads.

-Rylo

A little picture, I'm waiting that the video where I take this picture will be load on vimeo. I'm not very cool here, because after to read all the answers here, I'm a little nervous for trying the gun ! :lol

photogunfleur.jpg
 
That, too!

I owned one that wasn't sealed up and it looked like the entire vlave had been covered in quick steel. It was just a ball! It looked like one his his later pieces. The machine work had gotten better, much tighter than the others I'd seen. It worked fine.

Actually, JJ told me back in the day that he had found a way to make a valve last. I think the reason he spot welded the guns was to keep the secret as it were.
I traded mine to a friend and it shot with no problems other than a small leak in the back cap due to an old 0-ring.
 
Since we're on the topic, here's an older build-out session of one of my runs. I'm getting a newer video together now since I'm smack dab in the middle of getting a few more pieces together. I plan to do a new cleaning & handling video, too.

This video shows the Film and a shot or two of a TV version:

Sandman Flamegun (working) DS Gun - YouTube

You'd also asked about the felt. This is a pic of one of my builds so the set-up is a little different, but the concept is the same. Spent Calcium Carbide creates a fine powder (see pic) that can and will clog a valve if not properly filtered. I simply roll craft felt (billiard felt) up super tight and cut to fit. I then seat it below the threads:

9170-picture-2238.jpg
 
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Alexis, that valve is starving for oxygen. The flame pattern shoud be tight, crisp and concentrated. Be careful with that. Try running a little wire in the front of the flame tube and at the back of the filter tank. Check for clogs.

You can tell that the air-flow is restricted; I hate to keep harping about that valve, but it's clearly choking. I'd clean it up and let it retire on the shelf knowing it fired (to some degree) last time you juiced it up.

It's just old, man. Enjoy it for what it is though. Like I said, it's an important piece and deserves a great deal of respect in the prop world for being one of the first pieces offered. I would never have done my runs if it weren't for JJ. Just knowing the piece had been completed by someone else made it more approachable for me. After that, it wasn't long before a few of us dug in and ran our own. Good times!

-Rylo

Thanks for all tips Rylo : Your Functional Flamegun is my next goal ! When I have the money, I'll buy you one of your gun ! :thumbsup
Well, here is my little video, I'm not a cool man inside ! :lol

Functional Sandman DS Flamegun (JJ Lastelick Model) on Vimeo

Thank you very much at all members on this post for your help ! :)
 
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Rylo,
Important information : I was used a little quantity of Calcium Carbide and of bad quality (outside since few days). I will retrying in few days with a better calcium carbide and more bullets and water. Don't worry, I love very much this props : I'll take good care ! :thumbsup
Again, Rylo, thank you very much for all your advise, I'll apply !
 
No problemo. If you can find it, the old Calcium Carbide is the best. The older the better; it's got a higher gas yield. The older cans tend to turn to powder on the top leaving the pebbles a couple inches down in the can. That's the good stuff! The newer Carbide works just fine too, though. (provided it's reasonably fresh) You can find it on Ebay w/ no problem at all.

Sure, a larger charge may do the trick. Sounds like you're headed in the right direction and building up. Have fun! Let us know how it goes. :thumbsup


Rylo,
Important information : I was used a little quantity of Calcium Carbide and of bad quality (outside since few days). I will retrying in few days with a better calcium carbide and more bullets and water. Don't worry, I love very much this props : I'll take good care ! :thumbsup
Again, Rylo, thank you very much for all your advise, I'll apply !
 
Glad to see you got her up and running! ;)

Since you have an Aussie one I would retire the JJ as Rylo says it deserves a place of honor in your collection
 
Since you have an Aussie one I would retire the JJ as Rylo says it deserves a place of honor in your collection
Apollo can you know the date of build from the Aussie replica ? If you can find with the date of JJ Replica, thanks !
 
Don't know about the Aussie I think it was early 2001-04 maybe what do you say Rylo?

I just dug out my letters from JJ one dated Sept,9 1992 saying the gun will be $ 1, 625.00

On Sept 29 he stated the price would be going up to $ 2,000.00.
 
Retrying to shoot today : very good working. I'm very happy of this replica : great work. :)

It's a momentary switch. It's not intended to stay on
I want to change this switch by a same but with two positions (on - off). For when you push one time, the glow plug in on. And when you push again, the glow plug is off. Because I think that is not convenient the switch where you must push all time the switch for to keep the glow plug on ! But I don't find on the web...
 
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Agreed. The switch in this configuration is very tricky. You need to find an on/off momentary switch. AT present you have a norm. 'open' switch.

Not a very tight flame pattern on that JJ, but it's working! I prefer a tight, defined 'star-burst' which burns a little more gas but the end result is great!

-Rylo

Retrying to shoot today : very good working. I'm very happy of this replica : great work. :)


I want to change this switch by a same but with two positions (on - off). For when you push one time, the glow plug in on. And when you push again, the glow plug is off. Because I think that is not convenient the switch where you must push all time the switch for to keep the glow plug on ! But I don't find on the web...
 
I recently rehabilitated my JJ Lastelick 'Logans Run Deep Sleep Flame Gun' that I'd purchased from a dealer-friend of mine back in the early 90's. It's built almost to the original movie prop specs, since my friend had 'procured' one of the movie originals and had it duplicated assumabley by JJ.
The unit I own was in perfect working order back then, and the flame it produced was exactly how it appeared and sounded in the film, magnificent!
But like a dumb kid, I had removed the cotton wading to clean it one time and didn't immediately replace it. Some of the calcium carbide had blow into the valve and basically seized it. No more flame, no more awe at the bright light it would make, a sad day indeed. I stored it away, finished school, moved out west, and forgot about it. Then recently I bought the Logan's Run blu-ray and watched it with the wife. Afterwards, I decided to look for that gun and try to get it working again. When I found it in storage several weeks ago, I started working on it.

*That attached image is for reference and is not the JJ Lastelick version
.

The following is for anyone who owns a non-working JJ Lastelick's DS flame gun. Don't give up, it might still be made functional again.

FYI: JJ built these by welding the barrel directly to the frame (to prevent acetylene leaks), which makes servicing the valve difficult. Also its my understanding that these valves can be rather fragile and are obsolete or not available anymore.

1) The 2.5v cyclone battery is built/formed directly into the handle and is not removable, to do so would destroy the guns handle requiring it to be rebuilt. I used a simple variable power supply as a charger, and set it to 3v per the original instructions from my dealer friend. Luckily it took a full charge and the glow plug burned that happy orange glow again. Amazing 20+ years and the battery still works!

2) Just as when I had stored it, no air could get through that valve. I decided to soak just the top portion of the barrel in a shallow tray filled with CLR for a couple of days. I made sure to only submerge the barrel enough to flood the barrel and valve and not touch the glow plug or handle. That freed up the valve a bit and allowed gas to pass through it again. Then I shot s decent amount of WD40 into the tank port of the barrel and actuated the trigger until the WD40 start dripped through the front of the barrel. I finished by blowing canned air through the barrel since it was of a reasonably low pressure and I didn't want to damage the valve.

3) I bought some craft felt and rolled it as a filter (as I had seen in another recent replica), instead of using the original cotton wading. I slide it into the felt chamber (middle of gun), then screwed on the rear acetylene tank.

+ For my first test firing, I loaded the chamber with 5 calcium carbide pebbles, water, connected the battery, and fired the gun. It produced a decent flame effect result. But it was not at the full intensity that I remembered it did when it was new or at that same high intensity of the movie. When it was new and fully charged, I could get a couple of really large good high intensity flames, and then several smaller short shots. Now it was at least firing with a dozen shorter smaller flames. Subsequent firings seemed to clear out the valve more and more.

4) I decided that the gaskets probably were allowing to much gas to leak out, so I went to the local hardware store and got a few plumbing #48 rubber gaskets to replace both the cap and tank joint gaskets.

5) Success! The new gaskets worked well (for a few times then leaked) and the next series of test firings produced that larger screen correct flame effect and sounded spot on! But the gaskets are not the correct ones as it seems that they can not handle the warm gas reaction in the tank.

Next steps;
A) I need to get a better set of gasket and test fire again.
B) Also the switch that turns on the glow plug isn't working reliably. It's activated with the applied pressure from the purlicue of my hand. I'll research a potential replacement with the same version or another variation.
C) And I'll update with new pictures from the test results.
Logans Run Blueprint.jpg
 
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