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I have a feeling the air-hose idea would work much better if it wasn't coiled so tightly- it's literally the same concept as how Nerf Rival blasters are fed through a hose with a fan at the opposite end- investigate that idea for certain.

@pb.projectbox

6 ай бұрын

Yeah I didn't really give the air tube a fair shot cause I really just wanted to build an insane spinning contraption haha

@ericlotze7724

6 ай бұрын

@@pb.projectboxHelical Magazine is pretty sick ngl! (Also only needs the motors (in theory) ), no compressed gas.

@RighteousFondue

6 ай бұрын

Yeah I agree, I think it has some legs, you would probably just want some sort of piston or ball in the tube behind the darts which captures air better, and actually pushes all the darts forward when air pressure is applied

@barrygillis

6 ай бұрын

Yeah, a straight hose would be so much better than a coiled one,and only thing you need is air to push them out all at once, giving 1000s of darts per second. Then if you need more darts per second just add straight hoses.in a hexagonal pattern, no waste parts, all you need is an air reservoir and a valve. I think i came up with an awesome and boring build video, but add enough heavy rock music and it will be brilliant, million darts per second nerf blaster!

@SuicideNeil

6 ай бұрын

@@pb.projectbox For sure, the crazy drum-mag contraption is a work of art in & of itself- much more of a challenge compared to a hose pipe and a fan at one end. Worth exploring both- with the 'easy' option as a backup.

I love the way you broke down the problem to a fundamental level. A lot of engineers have a bad habit of trying the same thing as others but with more resources. You noticed that the firing time was a small portion compared to the loading time and found the true limit for a single "barrel". Good job. Also, you could potentially add more mass to the drum so that once it is spun up, the kinetic energy of the flywheel does all the work of feeding the darts. You wouldn't need a big motor, just a large angular momentum for the drum.

As you dont need sustained torque, but only a short burst, a flywheel could solve your stalling problem somewhat. It would increase the spinup time, but mabe give the drum just enough stored inertia to keep it from stalling.

@pb.projectbox

6 ай бұрын

Dang, that's a good idea. I'll definitely experiment with that once I fix the drum threading issue.

@pherretofdoom

6 ай бұрын

could you potentially use the drum itself as the flywheel? build up the drum to be chunkier and stronger, while adding the rotational mass to it? can't wait to see what you come up with. some really neat outside the box problem solving @@pb.projectbox

@Turbowagon

6 ай бұрын

Came here to say this

@Turbowagon

6 ай бұрын

I actually thought the roller drums for the bike setup were going to just be weight for the drum

@JMMC1005

6 ай бұрын

Better to put the flywheel on the motor. That way it's running at a higher speed and will hold significantly more energy (though taking even longer to spin up).

Always remember to water your dogs.

Another point on the pneumatic hose idea: a follower with a tighter fit behind the darts in the tube could help it feed. Like a sabot or shotgun wadding. With the rest of the darts loose you wouldn't need to worry about coiling it as much and you wouldn't have as much of a change in resistance when you put more and more darts in.

I think my favorite part of all these 100+ Dart per Second concepts is they all use different ways to achieve it, the only thing they have in common is they use flywheels but thats it.

If you increase the drum diameter you'll increase not only the surface speed but also torque. I suspect that the drum diameter was chosen by the print bed size, if you use a tube liner on your drum you can create a smooth dart track without a bunch of post processing. I really liked the angling servo for once the drum was up to spoed.

@dolovo_gaming3081

6 ай бұрын

With increasing the surface speed you also need a lower RPM to achieve the same darts a second

To deal with the thread engagement issue, why not use a permanently engaged thread with the rollers being attached to a 'ring' that surrounds and rotates with the drum. You could then use a clutch to grab the ring, causing the drum to feed. Another option could be to remove the lead-in section and just have the roller held clear of the drum until firing time. You could design it so that it drops in at a specific point in the rotation in order to capture the thread. You could even design the shape of the thread so it does half a rotation with zero pitch, helping the roller drop in cleanly.

you could place ribbon strips above and below the darts throughout the entire chain....as it goes through the hole, the ribbons can wrap around a secondary winding and out of the way, this will prevent the darts from slamming against the sides and causing a stop. Think of it similar to a railgun where they pack the slug in a breakaway to keep it aligned.

@pb.projectbox

6 ай бұрын

That's an interesting idea, but I'm guessing it could be pretty difficult to get that working. I might experiment with that.

The way the darts spew out is immensely satisfying, it's such an absurd way to fire them, I love it. Also, I was pretty shocked when I went to subscribe and saw that you hadn't even hit 1k, how are your videos already this good? Edit: 20 minutes later and it seems you have already hit 1k, congratulations

You might want to try replacing the path the darts take out with some brass tube, they seem to catch a lot on the print lines there so a smoother path should reduce a lot of friction

Recommendation. Push the roller. Have the exit adjust. Less mass that moves

I mean your problem with the drum is pretty much the same as getting the power of a car engine to the wheels. Some sort of clutch system would probably work well with this. And for later you still need a trigger system. Maybe a spring that pushes the drum towards the clutch? Just some food for thought. I am very impressed what you have made here and can't understand how you only have so little subscribers. Cant wait for part 2!

There have been several times where I have started to type out a suggestion for your process but then your next iteration was a mile ahead of whatever I was going to say. Really enjoying this build. Looking forward to the next one!

"Wanna see this thing shoot 200 darts per second?" Immediately liked and subscribed. I'm all in for this journey!

Excellent video! I love watching projects like these, It's especially fun seeing everyone's approach to solving the bottlenecks and other problems. Keep it up! (Also your workshop looks like a lot of fun to be in.)

I think the guise of a super fast Nerf blaster is an excuse to channel his desire for building nefarious contraptions, into something generally smiled upon

You would be a fantastic teacher! The way you explain The mechanisms in more simple breakdowns is really nice

awesome video! 1. i suggest making the outlet for darts more of a longer sweep around the exterior of the drum creating a chute for the darts to engage with for a few inches before reaching the hole dramatically reducing the angle at which the darts flee the center of rotation. (i recommend a teflon interface) 2. roller could interface with drum deeper in my opinion hopefully reducing overall wear and improving reliability. that servo actuated roller idea was genius btw. this whole project is incredibly cool and cant wait for part 2. i kinda wanna make one

Really cool project and design. Awesome video. This channel is going places.

Dude this is the most underrated I've ever seen, like around 5k subs rn, but has extreme quality content, nice editing, insane engineering skills, how you not a mil subs yet? Sometimes the world isn't fair and that includes the algorithm, im sorry

Definitely enjoying seeing you all pushing the limits

i love this video! I love watching any series that aims to get insane dps like this. once you can reach 200 dps reliably you should do an episode where you try make it into a proper blaster

@pb.projectbox

6 ай бұрын

It'll have to be backpack mounted. This thing is way too heavy haha

Awesome video! Cant wait for part 2!

great video! Honestly my favorite part was the overly hardcore montage of being all geared up riding around a class 2 folding ebike at like 12 mph

Brilliant! Loved the sequence where you were building up speed to over 700rpm 😄

Ethan this is incredible. Love the result and how you break it down for us.

@pb.projectbox

6 ай бұрын

Glad you liked it!

Well showcased skill set. Impressive!

Perhaps instead of a second, shallower thread, you could just extend the groove for the darts farther, and run the roller in that. Just have it completely disengaged until you're ready to fire. You get lots of options for roller geometry that way (and pretty extreme engagement) too.

@pb.projectbox

6 ай бұрын

That's a good idea, especially different roller geometries. The tiny roller and single point of contact is by far the weakest link.

@No_Way_NO_WAY

6 ай бұрын

@@pb.projectbox i would try to get away from using a 3d printed part for that movement. Maybe you can use the center axis (the metal one) to implement the movement. (or a clutch and screw that moves the drum forward once the clutch is engaged.)

@legoenginemechanic101

6 ай бұрын

@@pb.projectboxthe problem is the darts are to close together and you will need at least one inch between the darts. Therefore to compensate for the lose you will have to make another one of these machines and combine them together

Excellent engineering, great skills!

Such a cool project! Great idea to eliminate most of the load time! Fun workshop with Laser, Cnc, 3Plasma too!

@pb.projectbox

6 ай бұрын

Thanks! Glad you liked the project!

cant wait to see part 2

One thing I notice is that the rollers on the transition piece are not moving until the darts make contact with them. This could be contributing to higher frictional forces. What if you add a flange to the end of the dart drum on the inside to get those rollers moving before their engagement is needed? Otherwise, I think the darts are having to accelerate the rollers themselves and that's potentially a lot of force at the start.

@pb.projectbox

6 ай бұрын

Good catch! I'll have to look into that for my next video. I'm currently designing a torque meter of sorts to measure the forces the drum experiences. I'll definitely experiment with pre-accelerating those rollers and see if that makes any difference.

Great job, have a gold star yourself 🌟 Also your dog is so cute!

nice work! subbed 👍🏼

Cool project and great dedication! You deserve way more views. I saw the Open Sauce exhibitor badge at 7:56, hope to see something like this nerf gun there this year!

@pb.projectbox

6 ай бұрын

I hope I can bring it! Just gotta make it functional and apply for the exhibitor spot again.

so glad to see the legend starting up another banger project, keep up the great work.

That was great!

You sir earned a subscriber! Amazing video! It was informative, entertaining, and showcased the engineering process well

@pb.projectbox

6 ай бұрын

Thanks for the input! I'll make sure the audio is better for the next one.

When I'm prototyping things where the geometry is likely to change, but making one large, singular part over and over again is impractical, I try to design a test bench version. Instead of having one big roller with integrated grooves and features, make a drum and points for fastening new geometries (with helicoils to reduce wear and tear). Any part that needs to have low friction or a lubracious surface, using plastics like nylon, acetal resin (delrin), or PTFE (Teflon) work well. You could also try driving a pair of wheels at the exit with the overall drive chain. You could get some extra oomph on the darts, and possibly alleviate some good jamming issues at the end. Tapering both ends of the barrel will also help. The taper on the way in helps with feeding, and the taper at the end helps the darts stay straight. This was super fun to watch. I enjoyed the addition of the thought process.

I love problem-solving like this!!!

Great breakdown! Love the video.

@pb.projectbox

6 ай бұрын

Glad you enjoyed it!

this video is so well edited

Awesome project!

All the engineering involved just for a nerf blaster. Now think about the guy who brainstormed the 'Hellfire R9X'... "Lets shoot swords at someone"

i work at the place that nema34 motor was produced, always super cool to see people using them in the wild

Nice job! I'm hoping for some more stunts from Malachi in the next one

@pb.projectbox

6 ай бұрын

That's the plan haha

Boy, you fought a LOT of mischievous problems!

this is awesome

That’s an amazing prototype

Damn, 100% worth subscribing

@pb.projectbox

6 ай бұрын

Glad you liked it!

This is really an amazing idea. My brain started thinking of other areas this technology could be deployed. I wonder if a similar drum magazine could be used in caseless amunition firearms.

This is intense!

This is insane!

Cool project! A multi-start ballscrew engaged by a friction clutch attached to a flywheel-enhanced drum might be a good option. Commercial ballscrews are a bit spendy, but maybe a chonky printed multi-start thread could do the same job. Looking forward to updates!

Your idea to decrease the loding time is just like my curtain rod magazine fed flywheller that could hold 32 1/2 length darts.

Faster than my monitor evolution

this is how i always imagined the Maliwan SMGs from Borderlands would function

Three things: 1. Get a more appropriate motor. Gear down a big brushless or brushed motor. 2. Make the drum spin externally. You're rubbing the darts against the outside drum for lots of friction. 3. Bigger mag, more funner.

''Thats it!'' - metal storms your dart blaster

Guess I'll race ya to 200 ;D This design is really awesome though well done, if anyone can hit these ludicrous speeds I think it'll be you.

@pb.projectbox

6 ай бұрын

I'd be very interested to see how you'd approach it. Let the race begin!

I'm almost imagining a hose-like structure made of repeated flywheel modules which fling the darts into the next set of flywheels to ultimately come out wherever the final 'nozzle' set is pointed. At this point all you need to develop is some sort of back mounted funnel hopper which gravity feeds a steady line of darts downwards into the module hose. Assuming you got even 9 of the 9.8 m/s of a gravity drop then that should take you through the 25 feet of darts. You might even be able to rig a compressed airflow to give the darts leaving the hopper an initial boost into the flywheel array. This would solve the problem of the spiraling angular momentum in exchange for friction losses and directional instabilities as the dart chain passed from flywheel to flywheel from the hopper.

Pretty sure you'll want to reverse the pulley set up. The way you had it essentially increased the friction that the motor had to overcome

I love how this is actual military tech. It’s called the metal storm

I would look into tighter tolerances, additional guides into the barrel, longer barrel, lubrication (graphite and ceramic coating), and maybe change the tips of the darts to a less abrasive texture.

Dassasub right there!

second flywheel, second dart path on the drum: if you stack the flywheels one path will feel slightly after the other. B will fire while A is setting up the next shot.move the flywheels as close as possible to the drum and layer the darts, the bottom layer will act like the threads for the top layer. You wouldn't even need to add another motor. maybe just tilt the pulley shafts to line up with the second dart feed path.

I clicked on this video and after watching assumed you had at least 50,000 subs.

So interested by this ive almost forgot to eat lmao

I'm sure someone mentioned it but a thin layer of silicone lubricant will make a world of difference for friction. It's been a game changer on my 3d prints that have moving parts.

Thats basically the iron storm, a technological demonstrator that managed to fire like 1 million bullets per minute

I don't know how much you know about the Nerf modding hobby but there's a lot of work that has been done already. You should look at what Luke at Out of Darts has done with his HIRacane and Proton Pack. They use Nerf Rival balls. Using omnidirectional ammo really helps in a lot of ways.

love that goofy sound

The multiple lines method would work if you thought about it differently. The US military experimented with a gun nicknamed “metalstorm” which was basically a whole bunch of tubes stacked in a grid pattern with spooling ammunition. They where able to get up to *Technically* one million rounds a minute. (It was basically just a shotgun at that point.)

Maybe just add a flywheel to the spinning barrel to help with the torque issues

Its a hard filament to print but delrin/POM/acetal is a self lubricating tough low friction plastic. Might be worth making the drum out of it.

Could you use powdered friction modifiers on the outer wall of the drum to try and prevent the grabbing?

Alternative to the roller screw is a ram with a wheel/roller on the end pushing the drum across. Gives less timing/sync control though but insensitive to lateral loading a roller/screw thread

Something which might help with stalling due to friction during feeding would be to increase the mass and moment arm of the drum. Use it as a flywheel to store energy to overcome the load spike.

The air hose, seems like a really good method for me, like in this tube post systems. You should probably try it with a vacuum, since the dart has the highest friction coefficient at the tip, or a combination of both. For the drum version I would get rid of the thread and use a spindle instead combined with a clutch. Similar like a gearbox works in a car. By engaging the clutch the spindle will move and push the drum downwards

Would you consider having a longer start up area and use a metal wire to pull it or maybe? Maybe 10-20 threads that you can lay wire around with a minimal vertical change before it hits the darts

Make a double threaded drum where one of the threads guides the drum and the other holds the darts. That way you can cover the thread holding the darts, eliminating friction.

the air hose idea sounds like you messed with a gaggle of geese

You could try a metal overlay on your track to help with the derability and maby add a flywheel to help with momentum to keepit from stalling

im picturing 20 barrels gatling style holding 10 darts each and as it rotates it grabs a dart out of the next barrel, giving it a full revolution to reload each barrel

I think the air hose idea will work if you have a piston in the end of the hose with the compressed air behind it. That should push all of the following darts. Also, you could make the thread in the drum deeper so it can't jump as easily.

You might it wanna get your flywheels on it sooner rather then later, might find that it adds issues that would suck to have to fix later in the project. It also might help prevent some jamming when the darts are leaving the magazine

This might not be relevant, but I feel like putting the flywheels on would help since the darts would disengage with the drum as soon as possible, eliminating excess friction at the end of the run.

I do have one question. Are you restricting yourself to only one barrel / shooting system? I don’t know exactly how much that would help but I do wonder if it could have more dps’s.

@pb.projectbox

6 ай бұрын

Yep! Having 200 nerf guns fire at the same time would certainly get 200 darts a second but I liked the extra challenge of just using a single barrel.

Schneider electric motor, nice, I used to work for Schneider haha

you are damn right your dog is so darn cute!

Thinking about the friction on the tracks - when electricians are pushing wire through conduit, the corrugated tubing makes it easier than solid wall (contrary to what we may think). What if you redesigned the magazine to minimize the surface contact with the projectile?

For the hose you *could* make a hose that has rollers on either side or at the cardinals to reduce friction. Or maybe even fluted to reduce surface area touching the dart.

Another interesting idea would be multiple rotating barrels like a gattling gun

Once again a clear case of "anything but metric"

I really think using some lubrication in general would help, however, I also think making the drum out of metal would solve a lot of problems too

You could try to champfer the exit, could reduce friction. Additional: find the friction Surface and blow out air there. (Gyroid infill+Holes drilled where needed) This principle is also used in air bearings. Second: use a Metal roller and a bigger drum thread. Also: lower runout allows you to stiffen up the roller bearing.

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You may add teflon tape strips on the dart holder helix, it may decrease the friction without needing to print it again.