I'm very interested in this project. i want to build my self a coil riffle. yes im waiting for the schematic 😊

I thought it was 14 guage wire not 16 guage?

Such is the internets and everyone's ability to hide behind anonymity......they will never truly feel humility, so they just go through life being ignorant and soon they become willfully ignorant....Stupid.

Real BigSwede no money to build anything.

Schematic?

I will have to disagree with that statement. You need a current probe or current transformer. You need to zoom in the the signals, you are losing so much resolution with the scales (voltage and time) you are using.

With recovery mode you mean linear mode? As in an active clamp? There are many stupid things in this design tho, like the coils.. Too thick wire, not enough turns

@@sporkeh90 Talk is cheap, prove it.

Natan Kovard kzfaq.info/get/bejne/etCfjKt93suWoGg.html watch this my friend.

Clay Reid I saw that, impressive even at range. It appears as though you're using some kind of drag stabilizer? I'm really into 3d printing and have produced some neat fin sets for the afore mentioned arrow heads, trying to impart spin. Hence the curiosity. Also, thank you for the reply!

It doesn't have a metal tube it's a carbon-fiber tube.

TheIAMINU timing is adjusted by an oscilloscope that is how it is done accurately there's no need to space the coils the part that just slows it down, and that was verified by the scope that's why the coils are where they're at.

Oh si por supuesto... See also New Portable Super Coilgun: kzfaq.info/get/bejne/qMmcf9aCntTdlZs.html&feature=youtu.be kzfaq.info/get/bejne/Y9Oad9ShxNW7ip8.html

+Clay Reid Thanks, great job on this project.

ohh 1980 i was not even born at that time, and thats why you designed that bad ass power converter great man .

Aye Captain

A rail gun is a different concept

Kinetic energy = 1/2M x V ^2. Lowering the mass and increasing the magnetic force should exponentially increase the kinetic energy of the projectile.

Thanks for the information on why 16 gage. I'm currently trying to choose and I don't have a cooling constraint, and it's hard picking what to use- I think I'll go with 18AWG but it'd just be arbitrary over other wires in that size range.

Clay Reid which optocoupler is that ,can you tell the part number

The current reverses in the coil when the magnetic Flux collapse, when that finished then the scr shuts off. And the capacitors charges up backwards then the diodes discharge the reverse voltage in the capacitors. Noted by the voltage waveform on the scope going below the center line.

Yes it does.

@@RaptorRotorHead 3 years later, TY ! :)

@@HellTriX it does show the timing in the video so it's there you just got to watch the whole thing through

@@RaptorRotorHead I still don’t understand how you know when to fire the later stages. If ferrite accelerates slower (since it is less effective ammo), then later stages need to delay more before they fire. How do you account for this delayed timing? The projectile, either ferrite or steel, should be accelerating through the barrel. It’s speed shouldn’t be constant. Waiting 2ms per stage or whatever seems to me like the wrong way to do it. Edit: Right at the end of the video.. you adjust the ‘timing’ by using smaller and smaller capacitors?

@@davadoff first do you have a chronograph you have to have that and you have to have an oscilloscope do you have those two pieces of equipment? The easiest is a trial and error approach basically you decide how long a projectile you're going to fire am I giving example that's 2 in long so I have to wind a coil that's 2 in long. Now we pick some capacitance and we connect that across the coil with the s c r we put the 2-in projectile part way into the coil like 1/4 of the way so that's a half inch in. Now we set up the chronograph at the muzzle of the coil and we charge up the capacitor and we fire the scr and we measure the speed in feet per second on the chronograph. If the speed of the projectile is 75 ft per second now with some simple math you can figure out how fast the projectile travels in 2 in. 1/75= how long it takes to travel one foot. 0.013333 milliseconds. Now how many 2 inches are there in a foot there are six right? 0.013333/6=.0022 milliseconds. This is the pulse width of your first coil. You adjust the capacitance up or down and you test and you find the fastest projectile speed and you make the calculation that's the pulse width of your first coil. Your second pulse width for the next coil stage, it's going to be less than 2.2 milliseconds because the projectile is already moving and not going from a dead stop. About 1.2 milliseconds for the second stage. Each stage the pulse width must be quicker or the projectile will slow down. So that's a shorter pulse width for every succeeding stage. You will discover that you get the most feet per second out of the very first stage and every succeeding stage after that you get less feet per second added on your total feet per second. It works by basic law of physics mass and inertia a certain amount of mass a certain amount of inertia and that takes a certain amount of time to move the projectile it's how they shoot down nuclear missiles. Now went to fire the coils that's done with an Arduino Nano so you have to write some software and you have to program this two milliseconds here 1.3 milliseconds there and that's how it knows how to fire the coils the physical thing is figured out all you got to do is figure out the software thing the math to it and it'll work perfect every time with the same size projectile which weighs about 14 Grams. Now this is where the oscilloscope comes in you use that to measure the pulse width at each coil when you achieve the highest speed so that you know where you're at at the second coil you're going to have less pulse width so you'll measure with the scope and make it a little less then you'll check out your speed you go for the fastest speed it's adjust the capacitance up or down to get the pulse with at the optimum speed.

Maybe trains shall do. 😀 kzfaq.info/get/bejne/gJ-SY61jnrXecYk.html

Clay Reid does the optocouplers directly drive the scr bank or do you have any transistors hooked up to optocouplers to drive the gate of scr

☝🤓 of course

He's high on drugs, I use 10 scrs in parallel, for each coil, good for 5000 amps pulse duration is 2 mil seconds, there is no heat build up, the heat is in the first coil. That's the longest pulse. After 20 Shots That COIL Can Get hot.

Oh si por supuesto... See also New Portable Super Coilgun: kzfaq.info/get/bejne/qMmcf9aCntTdlZs.html&feature=youtu.be kzfaq.info/get/bejne/Y9Oad9ShxNW7ip8.html

I think he hardcodes the timing in the arduino code based on experimentation

RonioFOX hi, check this out. long range test. kzfaq.info/get/bejne/etCfjKt93suWoGg.html

thanks