High density Coil gun Multi-stage

[@inverse2k1]

6.2% efficiency may seem low, right? Most designs barely achieve 1% efficiency. My hat's off to the developer, much respect, Sir.

[@howtomakeacoilgunoffallout4096]

Oh sure. Maybe, maybe... See also: Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0 kzbin.info/www/bejne/j32yiqupptudrZI

[@gaussDANTIST]

good job!!! What total wight of the construction. my opinion - voltage must be increasing many times

[@tomtechtod9200]

Thanks. Higher voltage next time. Weight is 2.4kg, mainly due to the main cap and metal support

[@MEGAVOLT]

@@tomtechtod9200 hi buddy here is my Mega Gauss. kzbin.info/www/bejne/mWO5ZmCmo9qqers

[@tkts8782]

Getting some Doom and Half life vibes, and a heavy fallout 4 vibe for sure

[@ahmdabdallah5811]

What Is Islam? Islam is not just another religion. It is the same message preached by Moses, Jesus and Abraham. Islam literally means ‘submission to God’ and it teaches us to have a direct relationship with God. It reminds us that since God created us, no one should be worshipped except God alone. It also teaches that God is nothing like a human being or like anything that we can imagine. The concept of God is summarized in the Quran as: { “Say, He is God, the One. God, the Absolute. He does not give birth, nor was He born, and there is nothing like Him.”} (Quran 112:1-4) Becoming a Muslim is not turning your back to Jesus. Rather it’s going back to the original teachings of Jesus and obeying him

[@expandedsteam6985]

It’s literally the gauss rifle from fallout it’s crazy

[@notfunnnydude]

@@ahmdabdallah5811 I don't care

[@marcanthony3167]

@@ahmdabdallah5811 no it is literally making jesus into just another prophet!.. when in reality he was the word of God made flesh!

[@howtomakeacoilgunoffallout4096]

@@expandedsteam6985 Maybe, maybe... See also: Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0 kzbin.info/www/bejne/j32yiqupptudrZI

[@PavelChernov]

I believe adding a simple spring or using compressed air for initial acceleration of a bullet would increase overall efficiency without adding expensive coil stages.

[@CarinoGamingStudio]

the future sniper riffle.

[@chesterpayne9033]

Could you adapt this technique to make an air rifle coil operated air compressor type

[@Ezio-Auditore94]

Amazing engineering work. I wonder if the projectile is saturated, it could be possible to commutate magnetic field direction when it passes the middle of the coil, so it would add a repelling force to it, in a way that would be like adding more stages without using more space. I know it's too difficult to calibrate and even measure/comprehend the timings of magnetic field changes, not to mention the hard work of putting this devices together. This coilgun looks like years of work. Thanks for sharing this information. And again, amazing work.

[@tomtechtod9200]

Thanks. AFAIK the magnetic domains are nearly instantaneously reoriented, all of them at these field strengths. I can be wrong of course but I don't think it's worth the effort trying this. The design is also to simplistic to allow that amount of fine tuning. Thanks for the feedback

[@Ezio-Auditore94]

@@tomtechtod9200 You're right, this could be practical only with stronger magnetic fields or highly magnetic permeability projectile materials. May be can never be implemented on a handheld gun. Not my intention to suggest modifications to your design, just wanted your experienced though to clarify me a bit, and it did. (I know lots of people would say what you must do with your design, I personally don't like that a lot. Just a few people know how hard is to make a coilgun a fraction of complex as this one. If I sound too polite or something is bc of my bad english.)

[@louisroulston1462]

Put a pointed and weighted tip on the ammo so it flies straight and pierces thing easier

[@yaykruser]

Can you get it to break the sound barrier?

[@Octavio-mk5mv]

metal cilinder going at 205 fps, you have made a very deadly construction

[@antonellodigioia]

The efficency is very low. The problem is the method. You have maintain constant di magnetic field and switch perpendicular current for the thrust. In this way the thrust is continously.

[@howtomakeacoilgunoffallout4096]

Yed. See also New Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0

[@antonellodigioia]

@@howtomakeacoilgunoffallout4096 beware these experiments are very dangerouses for you, the people, the animals and every thing. Work in security condition.

[@howtomakeacoilgunoffallout4096]

@@antonellodigioia Yes of course. Ok

[@radioactiveboi842]

Ferb! I know what we're gonna do today

[@howtomakeacoilgunoffallout4096]

O yes. See also New Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0

[@RDCST]

I think it need to increase the field every 3 to 5 stages, maybe with more voltage or increasing wire gauge. Anyway, the result is impressive considering that you are using a projectile with no sharp tip.

[@howtomakeacoilgunoffallout4096]

O yes. See also New Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0

[@ВалерийТимофеев-г5т]

Реальная гаусс пушка! Круто..

[@Perkeletricksterservantofrher]

fruking killed the camera man 8:12 with that shot

[@JC-XL]

I thought the cameraman never dies 😂 😂

[@DAVIDGREGORYKERR]

You going to bump the voltage up to increase the velocity of each round by a factor of 20 if you rifle can take it without letting out the magic smoke.

[@joecitizen6755]

What is the amp draw and amp hour of your capacitors/batteries? In other words ... what are the chances of recharging to keep up with the discharge?

[@namernum5692]

Скорость наростания магнитного потока зависит только от напряжения

[@florentinvonfrankenberg7102]

are eddy currents in the projectile or delays between detecting the projectile and switching-time in the mosfet a significant factor?

[@tomtechtod9200]

Eddy currents yes, saturation if the projectile also. Detection to drive stage turn-on time is not a determining factor at these velocities

[@PawelSlab]

What does saturatipn of projectile means?

[@KoMaHu3aM]

keeping those algorithms happy...

[@simplecad7462]

How your coils are assembled? I think for core you should use soft magnetic materials that are easily magnetised and demagnetised. Coated layers for minimizing eddy currents just like in brushless motors use. And only few turns for coil to minimize inductance

[@tomtechtod9200]

Yes, few turns only. A core is useless unfortunately because at the magnetic field strength used it would be severely overmagnetized. The main limit here is the current capability of the mosfets

[@simplecad7462]

​@@tomtechtod9200 I see the current is so high that stator would start to saturate. Maybe air-core design works better for this application.. If you want to try high currents, i would suggest to explore how 18650 spot welders work. They work in 12-30v voltage range and use really robust mosfet stage to deliver high peak currents up to 2000 Amps. Example kweld from youtube

[@MrAj198]

I believe it would be termed mutual, rather than reluctance, if the projectile has no magnetic poles present.

[@modestorosado4128]

Can you say: "My name is Giovanni Giorgio, but everybody calls me Giorgio"? Nice video!

[@matthewferos]

I can’t believe he’s stopped making music now...

[@philippe-alexandrelabbe5270]

Nice work! Great integration. With such low voltage I hope you have low inductance hehe do you think the coil current shutoff too slow? Efficiency seems low

[@tomtechtod9200]

Yes I also expected higher efficiency. The coils are only a couple of uH, the current essentially looks like a square wave with very short on/off times. Efficiency could maybe be improved using powdered iron or laminated steel projectiles, distributing the main capacitance over the length of the first module and reducing Ampere/Turns (which makes the "barrel" longer for the same velocity). I'm done experimenting though with this

[@MEGAVOLT]

kzbin.info/www/bejne/e6q8pJZvatKSb9U

[@tomtechtod9200]

@@MEGAVOLT Great!

[@philippe-alexandrelabbe5270]

I saw that vid, very cool! I am using ferrite U-core in my coilgun design, it increases inductance but I am using higher voltage too.

[@howtomakeacoilgunoffallout4096]

Hey everyone. Oh yes of course... See also New Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0

[@64-bit63]

Electrical engineers be like: lets make the frame out of pcb it will probably hold up Mechanical engineers: JUST STOP THE TORTURE ALREADY😭

[@howtomakeacoilgunoffallout4096]

Oh sure. Maybe, maybe. See also: Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0 kzbin.info/www/bejne/j32yiqupptudrZI kzbin.info/www/bejne/rHbVoptmebSSiZI kzbin.info/www/bejne/hXesgmammKuNprc

[@sergiokneizl]

An idea, use a magnet and coil to give an initial hard kick and after that use the stages... Cheaper than a new stage

[@howtomakeacoilgunoffallout4096]

Yes. See also New Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0

[@mattstroker]

Are you Dutch? Or German? Basing myself on the accent 😁

[@howtomakeacoilgunoffallout4096]

Ja, ja, naturlich. Siehe auch: ! New: Apocalypse Coilgun, Fallout Coilgun kzbin.info/www/bejne/fWqQm36Nhd6AfNE See also: Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0 kzbin.info/www/bejne/j32yiqupptudrZI

[@RipperRzN]

I expected a fireball and a mini nuclear explosion on hitting the target )))

[@tomtechtod9200]

Me too . 😂

[@silentbloodyslayer98]

Thats a big ass capacitor

[@Polymerbob]

excellent work

[@doubleooh7337]

The only difference I'd make Is wind EVERY LAYER the same direction, so the magnetic fields of each layer would be n/s, n/s, n/s, n/s, n/s You've wound it back and forth, so you're magnetic field of each layer will be n/s, s/n, n/s, s/n, n/s Do you see how they'll give totally different results? It PUSHES the magnetic field outwards through repulsion, Winding back and forth PULLS the magnetic field inwards through attraction within the coil layers itself Hopefully you might try a side by side, for others to see as that's one comparison not done yet ;) definitely 2-3x stronger

[@tomtechtod9200]

Unfortunately not much gain can be obtained that way. The main limitation of these coilguns is saturation of the projectile. Once it's saturated the force on the projectile decreases substantially, with the same magnetic field strength. That's why all ferromagnetic projectile designs are still clunky. The best designs use a higher mass projectile and therefore have higher kinetic energy, still at very low velocities compared to firearms.

[@doubleooh7337]

@@tomtechtod9200 actually it can the coil you wind you think youre getting the magnetic field this other way actually gets

[@doubleooh7337]

@@tomtechtod9200 the video i just posted proves its over 2x as strong mas for mass.

[@doubleooh7337]

@@tomtechtod9200 the stronger field can handle a much bigger/denser material with ease, on my motor i can easily push n52 magnets super faster, the normal weaker coil needs much weaker magnets to push same principle with iron much strong pull

[@XxsniperxelitxomegaxlmaoxOwOxX]

the more exposed wires the better it looks

[@Mr_Asche]

OK! I recently got carried away with plasma accelerators. There are no steps, the speed is high.

[@TheKrimzonGhost]

Is it possible to put a first stage coil that induction heats the bolt?

[@NeutronStudios1]

Heating the bolt up will decrease the permeability, reducing the overall speed. Now chilling the bolt to below liquid nitrogen temperatures will be interesting to see.

[@TheKrimzonGhost]

@@NeutronStudios1 yeah but...blasters

[@banalMinuta]

This is amazing dude, incredible I was wondering if you could you use something like a mechanical spring or something to give it an initial kick? Would that allow the projectile to enter the 1st module at a higher efficiency? 🤔

[@tomtechtod9200]

Yes overall efficiency might increase but barely the muzzle velocity unfortunately

[@banalMinuta]

@@tomtechtod9200 I see, so are efficiency and the rate of acceleration related, is one a function of the other or are they totally separate?

[@howtomakeacoilgunoffallout4096]

@@banalMinuta o, yes. See also New Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0

[@eleccie]

Wow, nicely done.

[@MEGAVOLT]

kzbin.info/www/bejne/e6q8pJZvatKSb9U

[@tomtechtod9200]

Thanks

[@howtomakeacoilgunoffallout4096]

Hi! Oh yes of course... See also New Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0

[@sahil1307]

8:09fire

[@EugeniusMit]

Perfect gaussgun! But the efficiency is indeed low especially for half-bridge configuration ! Maybe because of the projectile form? Or the coils contain too little turns?

[@tomtechtod9200]

Thanks. Yeah, I was expecting at least 12% for this config. Increasing turns would make the current rise more slowly and the magnetic field would be generated too late. Higher voltage could help with that which increases part cost. I think the fast current rise time in the coil just in front of the projectile is actually counterproductive; I should turn on the coil some time before the projectile reaches that coil so it would only see a DC field. The position sensing is fixed though and not programmable.

[@EugeniusMit]

@@tomtechtod9200 , you could get much more efficiency,> 30 %. Here i got some calculations: coilgun.ucoz.com/publ/theoretical_papers/coilgun_calculations/efficiency_assessment_for_a_half_bridge_coilgun_in_real_operating_conditions/7-1-0-18 I think the problem in your case is that the circuits are in free-wheeling state for too long time after having reached a current limit, so the recuperation is inefficient...

[@tomtechtod9200]

@@EugeniusMit Interesting paper, but it's theoretical, I wish someone to build it - at low voltage. My current pulse looks similar to what is in that paper. At one point it states "Then the projectile must get no less than 4 m/s per stage supplied the velocirty gain is the same for all the coils (this assumption is plausible for multistage systems" which I think is incorrect. For a constant velocity gain you would need increasingly more energy for each stage, that would be very hard to achieve. Also, during the freewheeling time the coil regenerates back into the capacitors + there is current through the coil during that time which made me assume there is still a magnetic field and consequently a force applied to the projectile. What do you think

[@tomtechtod9200]

I really think one major contributor to efficiency is coil activation depending on projectile position, it might be suboptimal here.

[@EugeniusMit]

@@tomtechtod9200 , the identical velocity gain on all stages is of course an approximation, but it maybe close to reality because the acceleration is more efficient per unit energy spent when the speed is higher ( in my coilguns I clearly saw when the same capacitor placed in subsequent stages transferred different energy to a projectile).

[@treelonmusk5723]

if styropyro was working on coil guns instead of lasers

[@shadowwarriorgames3585]

Legit just came from his channel to hacksmith to this

[@andrewlans1145]

good job!

[@howardstark6707]

Ser gut arbeit! Sie auch: New Portable Super Coilgun: kzbin.info/www/bejne/qJTPfaaHbtOsm8k&feature=youtu.be kzbin.info/www/bejne/Y57NdaSmlNSKkM0

[@tomtechtod9200]

Спасибо

[@oozefang9120]

its probably a radiation gun that fires ionizing radiation at people

[@MKUltra-ti8ts]

Как то в пустую тратится такой объем материала

[@HashirEasa]

it scares me that the capacitor is 3x the size of the battery

[@tomtechtod9200]

:-D

[@howardstark6707]

Of course. Maybe, maybe. See also forgotten weapon Coilgun HS-47: kzbin.infoBPReIoZ-2Nw?feature=share kzbin.info/www/bejne/ZoipYnV9os6nbZo

[@RobertA-hq3vz]

Given that a bullet travels about 1000 meters/s it seems you're wasting your time here. The highest magnetic density occurs when you have a single turn coil. The more turns you add the weaker the field gets because all those added turns get pushed further away and just increase coil resistance and inductance. Try using just a few turns, but the in rush current will be huge so you'll need capacitors that can handle the high current surge.

[@tomtechtod9200]

Waste of time, not. Learned something. Bullet 1000m/s? Many are slower. And, these coils are small btw. Main limitation here is projectile saturation and consequently low efficiency

[@RobertA-hq3vz]

@@tomtechtod9200 speed varies I guess, en.wikipedia.org/wiki/Muzzle_velocity. I'm thinking you're probably not getting the magnetic field strength high enough, fast enough. Assuming you stick with 50v then the only thing you can do is reduce coil inductance. Hence smaller coils(thicker wire), not bigger coils. Less turns, more impulse current. Add cooling to bring the coil temperature down. Cool the bullet too.

[@thesceptic3006]

I want one!!!

[@MEGAVOLT]

kzbin.info/www/bejne/e6q8pJZvatKSb9U

[@program2445]

yea perfect

[@Marceline8080]

Dayum...

[@captain2212]

How are you supposed to eat with that gun? If I cant hunt with it, it's just a child toy

[@tomtechtod9200]

Huh?

[@captain2212]

@@tomtechtod9200 awesome channel! Can you make something with the velocity and projectile to take down game?

[@planktonfun1]

nice but expensive

[@LyllianaofMirrah]

make a real Half-Life weapons pls