Picture of Moose/Bear Repellent aka FLAME THROWER

The idea for this project was born from trying to get our campfires started with kindling and wood so wet we couldn't get them to burn with dry paper. Sure charcoal lighter would work but where's the fun in that?

Please don't be misled by the term Moose/Bear Repellent, I only used it to create more interest. It probably wouldn't deter a bear that was intent on inflicting harm. If anyone wishes to visit Alaska to enjoy the great outdoors, I would recommend some sort of bear deterrent. Be advised a big ol' can of pepper spray isn't always effective, they have even been seen licking it from the ground. Making plenty of noise or an occasional blast on a portable air horn while you're hiking will keep surprise encounters to a minimum. As for the moose, beware, they usually aren't afraid of anything and would love a chance to bully you for your snacks, or for no reason at all.    

Some words of caution: Be safe, have a fire extinguisher or bucket of water nearby and someone else there in case whats burning is you. Never operate indoors. You wouldn't pee up a rope or spit into the wind, it'll get ya if you do, so don't use it when the wind is blowing.

Materials: All materials are available at Lowes or Home Depot except the butane refills and birch plywood, which can be found at tobacco shops and craft stores respectively. Total estimated cost $50-$60 US.
8 in. of 1-1/2 in. type "L" copper tubing
1-1/2 in. copper end cap
1-1/4 in. copper end cap
1 in. length of 3/4 in. soft copper tubing
1/4 in. x 1-3/4 in. hitch pin
4 in. x 4 in. x 5MM extruded acrylic
24 in. x 12 in. x 1/8 in. birch plywood
1-1/4 in. length of 1/4 in. oak dowel
1-1/2 in. x 1-1/8 in. x 1/2 in. long aluminum angle
4 pcs. 1/8 in. tension pins 5/8 in. long
12 pcs. #8 x 3/4 flat head wood screws
3 pcs. #6-32 x 1/4 in. flat head machine screws
1 pc. #8-32 x 1 in. flat head machine screw
2 pcs. #6 x 1/2 in. flat head wood screws
1 pc. #8-32 x 1/4 in. flat head machine screw and lock nut
1 pc. #10-24 x 3/8 in. pan head machine screw, flat washer, lock washer and nut
pulse ignition for gas grill with wiring harness ( Lowes or Home Depot )
1 pc. AA battery
2.1 oz. can butane
1 paper clip
1 pc. 3/4 in nylon pipe cap
Titebond wood glue
super glue
a bit of solder

Tools used:

Laser cutter
Pipe cutter
Hand drill and assorted bits
Dremel with cut-off wheel and drum sander
Wire crimper
Sand paper
Propane torch
Router table
Phillips screwdriver

Below are the drawing files for the grip frame.
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DeeC410 days ago

Thank you for showing us all the steps to make this cool thing. Now the truth is that most of us actually can't really take advantage of these plans other than trying to find someone capable of actually making it. Please SOMEONE step up to the plate and start making these so we can pay you for making us one. The question I have is the back up cartridges of fuel.--contact me at "costaricariver@yahoo.com" and allow me to pay someone for a finished, working example--thanks.

DawsonD6 months ago

would you build and sell one because I don't have the tools, skill, and time to make one. Also how do you reload the flamethrower

DeeC4 DawsonD10 days ago

Let me know if anyone has contacted you with an offer to make one for you. What would you be willing to pay for one? Actually if I could get detailed plans I could possibly look into getting these produced-it all depends upon what price point we all will be willing to pay and also to have access to fuel cell back up loads. This could be a perfect hand held unit to be at the ready beside your car door or your door at home--or bedside table.

so wish I had time to make this thing would you be interested in selling one?

If anyone contacts you about making and selling this product -please contact me as I want to buy one myself. What would you be willing to pay for one? Also I don't see the fuel supply so I would want to be able to have a somewhat larger supply or at least back up cannisters or whatever is used for fuel so that I could rapidly re-load. Thanks--

DCComicsFan083 months ago
It looks like a Heat Gun from the new CW Flash series. I LOVE it!
CordellM5 months ago

dude i would so want to this myself for reason one i can learn alot and i can improve on this pus my guy u are a genius and a level100 prodigy good luck in your future indevors

American Ruin11 months ago

This is something out of my childhood dreams. Nice work.

Hi, nice instructable!.

I have one of these (http://www.alibaba.com/product-gs/200505011/Pulse_Igniter_JP_02A.html) instead of the igniter you used.
do you think it'll work?, I'm worried about the input voltage.

ps: i have the cable with the electrode and the push button switch on their own ..............
thanks in advance
flytye1 year ago
how can I get the PDF file.
Edgar2 years ago
If this is not Fun Time Stuff, I don't know what is! :D
Went to my Blog:
dman7892 years ago
have you thought about selling these?
madmanu19992 years ago
CONGRATULATIONS!!! you did a really well project.At this moment I haven´t got a laser cutter (isn´t a bit weird a 13 years old boy with a laser cutter?) so I cannot do it but it´s a really amazing instructable.Allso, here in spain it´s a bit difficult to find butane, but with deodorant and matches you can do a really cool flamethrower
Is butane not allowed in Spain?
No, it's just difficult to find.In Spain the lighters and all the stuff that uses butane is so cheap that you just buy a new one.
xSmok3y3 years ago
Just finished mine
mamajr963 years ago
About how much did everything cost?
xSmok3y3 years ago
what is the scale for the pdf file? I need it for my lazer cutter. Thanks!
Very nice work. Very Steam Punk looking. The copper tubing probably gives it some weight whereas I might consider using PVC. Do you think that that would be a melting hazard? Anyway, I read all the way through your Instructable and found it very thorough except I ended up becoming a bit lost with the soldered fuel chamber with the nylon end-cap. If I may be so bold as to ask, what is that chamber for again? And, do you have any photos of that chamber taken from a 3/4 view so we can get a visual perspective of it? As it stands though, I love it and it seems like a fun enough project to take on. Be safe and responsible folks. :-)
antoon3 years ago
really cool but i have no way of making it :(
creddits to the maker
Great job! I've been looking around for instructions to a flamethrower. This is really great but I might need to simplify it.
All I can say is... WOWZA!!!!
Very well thought out and I do believe it could be a formidable deterrent for lots of situations. Gob well done. I like it.
Severan_Mal3 years ago
Lol love the title and vid!
its all good until it blows up in your face...
PDRWLSN (author)  archieburden3 years ago
Blowing up is highly unlikely. The fuel can't even burn until it is discharged into the atmosphere. Also the valve on the butane cartridge is shielded from heat so the possibility of melting the valve and discharging all the fuel contents at once is eliminated.
This is amazing.........
PDRWLSN (author)  hossweightlifter3 years ago
Thank you, appreciate the comment.
Wow! That's a great instructable.
You have created a thing of beauty.

? sad
PDRWLSN (author)  FriendOfHumanity3 years ago
Thank you, glad you like it. Copper is going to be used in more of my projects.
Sergei-3 years ago

Thats awsome

I have some similar plans that i baught at an online book shop that use to be in australia about 15 years ago

Turns out these plans are from the information unlimited people and this book shop was selling a cd's worth full of things like this

That looks great can't wait to look more closely at it

PDRWLSN (author)  Sergei-3 years ago
Thank you.
Can you supply the website? I'd like to check it out.
Sergei- PDRWLSN3 years ago

The place i got the cd from has closed down but i can give you the site that origonaly had the plans for sale but they sell them at different prices and it's full of things like kits for things not just the plans/schematics


They have all sorts of cool stuff there

PDRWLSN (author)  Sergei-3 years ago

Thanks for the info, it's a cool site. Going to spend more time checking out their stuff later.
ilpug3 years ago
This is amazing, if a bit complicated for me.

If you put this in your pocket, it might be considered a concealed weapon, as this is probably extremely illegal.

Does this have a safety?
PDRWLSN (author)  ilpug3 years ago
Anything one could fit in a pocket that could cause harm to another could be considered a concealed weapon, it would depend on the intent of the one in possesion and what the one in possesion were doing at the time.

As for legality, it's legal where I live but there may be locations it may not be.

No there is no mechanical interlock, I wouldn't transport this, or my camp stove for that matter, with a butane cylinder installed.
ilpug PDRWLSN3 years ago
Yeah, true. Anyway, great design and build!
PDRWLSN (author)  ilpug3 years ago
Thank you. Happy you like it.
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