Flamethrower Gets Update, Retains Some Sketchiness

Part of what makes flamethrowers fun is their inherent danger. This is what makes a lot of things fun, though, from snowboarding to skydiving to motorcycle riding. As with all of these sensible hobbies, though, it’s important to take as much unnecessary risk out of the activity as possible to make sure you’re around as long as possible to enjoy your chosen activity. With that in mind, [Stephen] decided to make some improvements on his classic wrist-mounted flamethrower.

To start, he ditched the heavy lead-acid battery that powered the contraption in favor of a smaller 5 V battery. In fact, the entire build is much more compact and efficient. He was also able to use the same battery to run a tiny taser that acts as an ignition source for the flamethrower’s fuel. The fuel itself is butane, and the modified flamethrower is able to launch flames much further than the original due to improvements in the fuel delivery system. These improvements also include “Finding a way to prevent butane droplets from lighting and landing on [his] hand” which seems like a necessary feature as well.

The entire build now is very well refined and professional-looking, which is also a major improvement from the first version. It’s also worth watching the video after the break as well, which includes a minor run-in with the New York City fire marshal. And, it still retains some of the danger and all of the fun of the original builds which is something we always like to see.

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Let No Eyebrow Go Unsinged With A Wrist-Mounted Flamethrower

We’ll say it just once, and right up front: wrist-mounted flamethrowers are a bad idea. An itchy nose and a brief moment of forgetfulness while sporting one of these would make for a Really Bad Day. That said, this flaming gauntlet of doom looks like a lot of fun.

We’ve got to hand it to [Steve Hernandez] – he put a lot of work into the Flame-O-Tron 9000. Building on his prior art in the field, [Steve] went a bit further with this design. The principle is the same – butane plus spark equals fun – but the guts of this flamethrower are entirely new. A pipe bomb custom fuel tank is used rather than the stock butane can, and a solenoid valve controls fuel flow. Everything lives in a snazzy acrylic case that rides on a handmade leather bracer, and controls in the hand grip plus an Arduino allow the user to fire short bursts of flame or charge up for a real fireball. See what you think of the final product in the short video after the break; it sounds as though even if the fuel runs out, the high-voltage would make a dandy stun gun.

Maybe we should lay off the safety nagging on these wrist rockets. After all, we’ve seen many, many, many of them, with nary a report of injury.

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3D Print A Remote Control Flame Thrower

We all have a weakness for a good flamethrower project, but sometimes they can look a little hairy, even if losing hairs to them seems to be the order of the day. [Hyper_Ion] has a ‘thrower that might satisfy the need for fire among the cautious though, because he’s created a remote control flamethrower.

Fuel for the flames is provided from a butane canister held within a 3D-printed frame, and is delivered via a piece of copper tube to a welding nozzle. A plunger beneath the can is connected to a rack-and-pinion driven by a servo, connected to a straightforward radio control receiver. The position of the can is adjusted until there is just enough gas to sustain a pilot flame at the nozzle, and a command to the servo releases a burst of gas that results in a satisfying puff of fire.

This is more of a static stage effect than the wearable flamethrowers or flamethrower guitar projects we’ve seen in the past, but it is no less a neat project. And unlike many other flamethrowers, it’s simple to build. We have to deliver the usual exhortation though: take care with your fire, we’d prefer not to be writing either obituaries of Fail Of The Week posts about smoking ruins.

Fire. Vortex. Cannon. Need We Say More?

Tornadoes are a rightfully feared natural disaster. Fire tornadoes are an especially odious event to contend with — on top of whatever else is burning. But, a fire vortex cannon? That’s some awesome eye candy.

The madman behind this cannon belching huge gouts of fire is none other than Youtuber [JAIRUS OF ALL]. This build is actually an upgrade to one of his previous projects — a fire tornado gun that burned itself out and is now twice-revived — and is arguably better at creating a proper vortex to direct the flames. Built around a modified NERF gun, a pair of 60mm electric ducted fans with some additional venting — and tunable via a speed controller — direct the airflow through slits in a vortex chamber. A backpack of liquid propane literally fuels this phoenix of a flamethrower, so [JAIRUS] had plenty of time to put together some great footage. Check it out!

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3D Print Yourself A Flame Thrower

For a large proportion of the world’s population, it’s now winter, which means there’s plenty of rain and snow to go around. With the surrounding environment generally cooler and wetter than usual, it’s a great time to experiment with dangerous flame based projects, like this wrist mounted flame thrower.

It’s a build that does things in both a simple and complicated way, all at once. Fuel is provided by a butane canister with a nozzle that needs to be pressed to release the gas.  A servo is used to push the canister into a 3D printed housing, releasing the gas into a pipe to guide the fuel towards the end of the user’s wrist. The fuel is then ignited by a heated coil of wire. The heated wire and the servo are both controlled by standard radio control gear typically seen on RC cars or buggies. Using the brushed speed controller to run the heated coil is particularly off-beat, but it does the job admirably.

Overall, it goes without saying that this build presents some serious risks of burns and other injuries. However, the fundamental premise is sound, and it does what it says on the tin with parts that could be readily found in the average junk box.

For another take on a wrist-mounted flame thrower, check out this version using a scavenged solenoid valve.

Flame Throwing Drone is Actually Useful

A team in Xiangyang, China is using a flame-throwing drone to clear debris from high voltage power lines. These lines are made of metal of course, and are impervious to the high heat of the flames. Any type debris that gets on the lines will be charred to a cinder in just a few seconds. This is all is quite a bit safer than sending a human with some type stick up there near the high voltage lines.

Over the years here at Hackaday, we’ve seen people attach some strange things to drones. We can all recall the drone with a real firing pistol. And how about that drone with the huge flamethrower trying to cook a turkey. And let’s not forget the drone that fires bottle rockets.  [Caleb Kraft] did a write-up about hacking the AR drone years ago and mentioned that someone put an Estes-rocket on a drone.  While all of these are incredibly dangerous, ill-advised and for the most part useless, this new power line clearing drone may be the first exception we’ve seen.

What’s the strangest thing you’ve seen someone put on a drone?

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Cheap Flamethrower Is Predictably Worrying

We’d never criticize somebody for coming up with a creative way to save a few bucks. In truth, pickings would be pretty slim around here if we deleted every project or hack where cost savings was a prime motivator. That being said, there’s still some things you should probably spend a few extra dollars on. You know, the essential things in life that you need to know will be safe and reliable, like your car and…your flamethrower.

While we don’t have any information about what kind of car [Steve Hernandez] is driving, but over on Hackaday.io, he’s posted some info about his 3D printed wrist-mounted flamethrower. The final result does look pretty impressive, but given the subject matter and the lack of any safety gear, we would firmly plant it in the “Don’t try this at home” category.

At the heart of this flamethrower is a solenoid valve recovered from a Glade air freshener. Rather than spraying out the smell of lilacs, this valve has found a new purpose in life by squirting out butane from a pressurized can. The butane is then ignited by a spark gap made up two nails connected to a 300 kV boost coil.

[Steve] designed the frame of this creation in OpenSCAD, and printed it out in a single piece. It holds the butane can and solenoid in position, as well as keeping the nails in the proper orientation for the spark gap to function. Admittedly the head of his printed flamethrower does look very cool, but if there was ever a situation where you should be suspect of the heat tolerance of 3D printed plastic, a flamethrower is probably it.

What’s noticeably lacking of course is any method to keep the flame from potentially traveling back up through the valve and into the butane can. The high-speed flow coming out of the nozzle is probably enough to keep that from happening, but we still wouldn’t feel comfortable strapping his device to our wrist as-is.

You may be surprised to find that wrist-mounted flamethrowers are a relatively popular project here at Hackaday. We’ve covered quite a few over the years, but still aren’t convinced this is something we personally need to add to our collection of gear.