Homemade Railgun Experiment
Ok, so this involves actually making the railgun. So, my one essentially consists of rails sandwiched between two sheets of perpex. The first photo shows this. You can see on the sides two extra sheets of perpex next to the aluminium rails. This was initially meant to make the railgun stronger, but in hindsight was unnecessary. Place the straightened 2 inch copper wire along the rails above one of the stack of magnets. This will create a short on the rails, but this is where we want the electric charges to flow. Connect the free ends of the alligator clips, one to the negative end of the 12V battery terminal and one to the positive end. The 2 inch rod will now move.
These rail guns will fire a projectile away from the ship at around Mach 7 on a ballistic trajectory to a target one hundred miles away.
He built this railgun capable of firing rwilgun projectiles through pumpkins, cellphones, and into car doors and blocks of ballistics gelatin. All rail guns need a place to store energy, and in all cases this is a gigantic bank of capacitors.
For this project, [Zebralemur] is using fifty-six, Volt, microfarad caps. These caps are charged by a bunch of 9V batteries stuck end to end. When the rxilgun are charged, all the power is dumped into two copper bars in the gun, accelerating the aluminum projectile to speeds fast enough to kill. Although this does seem to be the year that all danger seekers are busting out their electromagnetic projection flingers.
Coilguns do rely on ferro dailgun projectiles, though, unless they do some sort of induction trickery. Will they work on the same principle as an asynchronous motor?
I mean they have some similarity to a linear-motor, but amke good bearings. Railguns dont use eddy gow, they use direct current that runs from one rail through the projectile to the other. Could be a real monster after that. The trouble is rail degradation is really severe, I would imagine that aluminum is probably the worst in this regard.
All of those sparks flying out of the end of the q are bits of the rail and projectile… The Iranian guy that rocketed to fame with his coilgun about 10 years ago Mehdi Sadaghdar? Maybe a sabot style projectile would work.
Also pretty hard to form what are two main parts of the cell cycle rails around a real cylindrical projectile, and you also have to modify ,ake typical ogive profile to give more contact with the bore for more power transmission, something avoided in traditional guns.
Because of the forces generated by the charge on opposing rails outward splitting the rails apart they are usually made in a square box form how to cook a perfect fried egg be easily reinforced.
I have often wondered if it would be practical to line a cylinder with copper and cut two helices opposed to each other the length of the barrel, much like rifling what is tier 2 unemployment cut into a bore. Keeping the copper in place would be difficult, especially torsion.
Idk if the helix would induce a desirable spin to the projectile or not…. Cooling is also beneficial to barrel life, iirc the navy is using filtered sea water to cool its rail gun barrels it started doing this on battleships pre-WW2 on conventional cannons.
What about a two-stage? Square projectile casing launched in the first stage across the rails and either splits upon exit and launches a contained ballistic projectile. It would be like having a bullet, but instead of a cylinder casing, gunpowder, and a projectile, it would have a flat sided launcher.
Or and the logistics are gonna be complex tailgun this transition from rail to rifled barrel. The projectiles have a square pusher housing hpw drops away to reveal a central hyper-sonic dart as how to become a land surveyor in florida projectile leaves the barrel.
The Navy appears to have solved the rail erosion problem as well. As for the Navy railgun — all proper railguns have and have had a square barrel crossection and use a discarding sabot, the Navy one has this weird, very thick arch the the back of maje sabot to maximise efficiency….
I understand, that rifling would be very difficult, but normally you want the raligun to spin for stability. Is this done? I meant that if the USA applied technology research to things other than weapons we might accomplish a lot.
This what is segs on blood test could be applied to space travel, cross-country transportation, etc. I was primarily criticizing the military weapons railgunn referenced in rai,gun article, not the man who made the DIY railgun. Jules Verne style… that pile of chemical style looks a bit …un-safe. The problem I can foresee with a electro magnetic launcher is simple. It would likely crush you. You would use gow as the motor.
Anyone who misses it most mske would fail any exam required to be able to vote if such an exam where to exist. I thought one weighed the ballistic gelatin target, and suspend it from from a kind of pendulum, and record the maximum height to calculate the energy the projectile carried….
However sparks and noise can generate much awesome with a smaller number of Joules so this build is extremely efficient at energy to awesome conversion. Honestly, I hoped the whole car would explode, railgn no. Then, I hoped the phone would stay intact, but no.
But do you have the right to bear such a battery pack? I wish there would be more discussions about ethics in hacking — I mean this is impressive, sure, but also pretty sad? Tailgun how? Just fun, railgub. NASA has investigated the possibility. Question was answered incorrectly. Why not use it backwards to accelerate think going up the parking garage before straightening it out?
But very easily a shutdown open pit could be refurbished if the surrounding rock integrity is nake. I get that reference! And I still remember those key sequences, actually had to type in the how to make a railgun two, DQD and KFA, in a dream the other night, believe it or not.
But not real life either cos it was a dream. But some keys appeared on a rock somewhere so in they went, felt much better for doing that. Then after that a different one with guys. You can make a quick and dirty and dangerous charger out of a 12V AC inverter. Using a voltage doubler, you can get about V or so DC. It is just a matter of limiting bow current to protect the inverter. All that for less than a batch of 9V batteries. I once read a paper capacitor of 1F would be the size of a kitchen.
Railvun at V. Would our guy have been better using a lower voltage but higher capacitance? I realise voltage counts as part of the energy equation, but the voltage is going to be almost nothing, dumped into essentially how to make a railgun short-circuit.
So maybe you maie a voltage of a certain level to do it. I wonder what the equations are how to make a railgun this sort of thing? You want something that mwke deliver lots of power i. It is not unusual to find a W inverter, but not so for ignition coil. Tweaking the inverter to give a slightly higher or lower voltage is pretty basic. Only V?
But raiogun it makes sense to use a doubler and hack it to regulate the peak voltage down to About V. So you come raiogun to V for the caps. I also would try to select the value of the doubler caps so the short circuit current would stay at a safe value, as an empty capacitor is essentially a short. I think he has taken a safer approach for this prototype. Isolation is much more complex at these voltages and especially so inside something that has lots of metal around.
How much of the stored energy is transferred to the kinetic energy of the projectile? As far as transferring energy, what are the main issues? I suppose the answer to that is lowest ESR possible for the caps. Why lots is parallel is good.
Or raklgun it obvious? His site is most entertaining so check it out if you got time to kill. Secondly, it was mostly the large population of Russia that stopped the Nazis. From presumably his pre-existing mental state, being a bit of a dick, and a superhuman consumption of amphetamines.
Even a couple of nosefuls makes you a paranoid nut. The vicious, gigantic arguments you can have, over almost nothing at all. TNG was great! Finally an answer to why there are no toilets in Star Trek. Nobody on DS9 could untighten their anuses.
I want to how to go from goa airport to calangute beach the story behind the car he rests the gun on.
What happened to the roof? Is that a redneck convertible? That would be a Saturn S sedan with the roof chopped off. So yeah… Not a very good one either, since that car has no more structural railbun. It requires hard work to make the phone, and a lot of pollution.
There is absolutely nothing interesting in shooting a phone, but it shows that some people have too much economical power how to store fresh vegetables in the refrigerator no knowledge of how things are made.
The thing, while cool, is really little more than an impressive toy. He was actually local to me, went to a nearby technical uni. I railguj he graduated and went back to Brazil. He was the son of some rich Brazilian trump clone, railgkn their impression was that he just threw money raulgun projects till something happened. A really photogenic target medium would be big blocks of ice.
Oct 05, · We show how to make a very simple railgun to illustrate how they work. Large railguns are amazing devices, they hold the record speed for a projectile at mor. Nov 10, · Making a railgun is “trivial”, solving the rail erosion problem and making them efficient aren’t. How much of the stored energy is transferred to the kinetic energy of the projectile? Report. Oct 18, · When all wired up, the railgun's 20 lbs of capacitors—3 pairs of J, V, uF units—can electrify the gun's rails to fire tiny aluminum rounds like this: This content is imported from.
The concept of a railgun consists of propelling a conducting object along 2 conducting rails due to a magnetic force and an electric force. The direction of the propelling force is due to electromagnetic fields called the Lorentz force. A charged particle moving with a velocity [V], through an electric field perpendicular to a magnetic field [B], will experience a force [F], as depicted in the diagram to the right.
This diagram illustrates the direction of the Lorentz force with the use of the right-hand rule. In the case of this experiment, the movement of charged particles through an electric field is the flow of electric charge moving across a copper wire. The magnetic field is induced with very strong neodymium magnets. Using the exacto knife, cut away the plastic cover of the copper wire.
Cut two strips of wires at 2 feet long with the diagonal cutter. Cut one more strip of wire at 2 inches long which will be used as the propelling object. Copper is chosen as it is a good conductor of electricity. Cut out 2 small circles from the cardboard and poke a hole into the center of the circle. Attach this onto the ends of the 2 inch wire to keep it on the path of the rods while it is being fired.
Clip an alligator clip leaving the other end free on each ends of the rails. The more magnets you have stacked, the stronger the magnetic force. Make sure that the magnets do not touch the copper wires since this will again, short the rails.
Since the neodymium magnets consist of a north pole on one side and a south pole on the other side, stack the faces up. Keep the magnets facing the same direction throughout this experiment. Remove a stack of magnets to the desired height and place them under and between the two rails. Place another stack as close as possible along the rails.
The magnetic force between these stacks of magnets will oppose each other. I held them in place with the two rulers. However, you can determine the direction with the compass. The north pole of the compass will be directed at the south pole of the magnet.
This will also tell you the direction of the magnetic force. Place the straightened 2 inch copper wire along the rails above one of the stack of magnets. This will create a short on the rails, but this is where we want the electric charges to flow. Connect the free ends of the alligator clips, one to the negative end of the 12V battery terminal and one to the positive end.
The 2 inch rod will now move. The direction of the movement can be determined by the forces described above using the right-hand rule. If you did not use a compass to determine the direction of the magnetic force, you can easily change the direction of the propelling rod by swapping the connections to the battery terminal.
Again, this can be confirmed with the illustration of the right-hand rule. Place the wire to be propelled on one end of the rail about 1 quarter above the first stack of magnets.
Reconnect the alligator clip to the 12V battery terminal and the wire will shoot. Using a sturdy meter stick made from non-conducting material wood, plastic , glue the stack of magnets onto one of its sides with super glue and wrap it in place with electrical tape.
Wait for it to dry. With the magnets facing the same direction as the original design, repeat with another stack of magnets right next to the first stack. This may be a little difficult since the magnets will oppose each other. Get someone strong to do this. Again, wait for it to dry and repeat until the row of magnets reach the length of the rails. Place the meter stick under and between the 2 rails with the magnets on the opposite side.
This will induce a magnetic field throughout the entire length of the rails allowing the wire to continue being propelled forward. Place the ferrite bead on a flat surface and fill half of the bead with silicone sealant and wait for it to dry.
Stick the ends of the wire being propelled to the center of the silicone and glue it in place with super glue. Make sure that the wire is long enough to keep its contact with the rails. This will keep the projectile on the path of the rails with less friction compared to the carboard originally used. NOTE : You may need to use a bigger ferrite bead to increase the weight of the projectile if it ends up flying off when it is fired. The chosen capacitors can be thought of as a bigger battery.
The battery like capacitor holds a charge which is dropped very fast compared to normal batteries that are commonly used AA, AAA, etc. This discharge rate depends on the time constant; the bigger the time constant, the longer the capacitor will hold its charge. Since the resistance of copper cannot drastically change, to increase the time constant allowing the charge to be held longer, we can increase the capacitance of the capacitors by connecting them in parallel with the 26 AWG wire.
The strip along the chosen capacitor shows a negative sign - which means the post closest to it is the negative post. Connect them in parallel by connecting the negative post of one capacitor to the negative post of the next. Repeat with the positive post. NOTE : 3 capacitors may not be enough to hold the charge, you can add more to your liking. To charge these capacitors, we apply volts to them using the power supplied from the wall socket.
It will either be or volts AC. In Canada it is volts which means we must multiply this roughly by 4 to reach volts. Using 2 alligator clips, connect the ends of the power cord to one transformer at 0 and Using 2 more alligator clips, connect the ends of the clips to the other end of the transformer at 0 and This ratio will multiply the voltage from the wall by 1.
Connect the ends of the alligator clips coming from the first transformer to the second transformer at 0 and This will again multiply the voltage by 1. Wrap the exposed wires using electrical tape so you will not be able to touch them. Do not touch the ends of the alligator clips connected to the transformer either. Test the voltage from the ends of the alligator clips connected to the ends of the second transformer with the multimeter at a setting above V AC squiggly line next to the V, not the straight line.
The voltage when plugged into the wall will be lower than expected due to the resistance of the wires and everything connected. Since the power coming from the wall is AC and the capacitors need to be charged with DC power it has a positive and negative polarity at its ends , we use the bridge rectifier to change the AC power to DC. Connect the ends of the alligator clips from the second transformer to the 2 middle pins of the bridge rectifier making sure the alligator clips do not touch any of the other pins.
Plug the power cord into the wall and wait 30 seconds or so for the capacitors to fully charge. Unplug the power cord. Test whether the capacitors are fully charged using the multimeter at a setting above V DC straight line next the V, not the squiggly line.
NOTE : You can connect the capacitors in series negative post to positive post to increase the voltage of the power source created.
Use the same number of capacitors for each of the parallel connected sets of capacitors example: if 3 capacitors are chosen to be connected in parallel in the picture below, connect the series with sets of 3 parallel-connected capacitors with a total of 6 capacitors.
In this example, 2 sets of parallel-connected capacitors are connected in series for a power source of volts. Each set of parallel-connected capacitors will have a total capacitance of uF. Set up the projectile above one end of the rod above a portion of the magnet. Connect the negative end of the capacitor to one of the rail ends with an alligator clip like the battery previously used. Using another alligator clip, connect one end of the clip to the other rail leaving the other end of the clip free.
Connect the positive end of the capacitor to the free end of the alligator clip that is connected to the other rod and the projectile will shoot. Introduction: How to Make a Railgun science Explained. By leeselectronic Lee's Electronic Follow.
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