18-step gaussgan
In the days of my stormy youth, when Fallout was not yet forgotten by the masses, and every second schoolchild played in Stalker, among the technically educated youth it was fashionable to collect (or at least try to collect) gaussgans, railguns and other “wunderwatch” seen in computer games . On some sites, world ratings of amateur constructions were maintained, and of course I wanted to be first in them. For this purpose, I planned to assemble an 18-step Gaussgan.
About this gaussgan I was led to write this article . It briefly describes the device single-stage gaussgan, so I will not repeat. The meaning of a multi-stage gaussgan is that the projectile, after exiting the first coil, is immediately accelerated by the next one, and thus each step would add speed to it a little.
')
Since my knowledge and skills in the field of design at that time were small, I decided to do everything as simply as possible and without frills. The barrel was a 10mm brass tube made of a stroymag, a “receiver box” - a piece of galvanized profile, a “frame” - a sheet of PCB, and a square cable duct as a case. The thyristors were found in the radio parts store, the capacitors I dropped from the CRT monitors, and the optocouplers - from ball mice. Other details were found on the radio market and in the old household appliances. Next - a few pictures of the assembly process:
The diameter of the wire, the number of turns, the geometrical parameters of the coils, the capacitance of the capacitors, the prevention of optocoupler operation at each stage needed to be selected individually to achieve maximum efficiency, and to calculate the efficiency, it was necessary to carry out test firing with different types of bullets after each change - in short, such “fitting "Took quite a lot of time. I used nail clippings as bullets:
To charge capacitors from a 12v battery, I assembled a flyback converter, the power of which was enough to supply 220v light bulbs in full heat:
Also came up with a step controller on Schmidt's trigger:
When all the steps were already in place, I suddenly remembered that the Gaussgan needed a pen, for which to hold it, and a trigger. The body from the broken drill was used as a handle, and the trigger was a button from the microwave.
Here is what a ready gaussgan looked like:
A couple of test videos (I apologize for the quality in advance):
And now a little about the performance characteristics:
The energy stored in the capacitors is 550 J
Bullet Energy - 28 J
Bullet speed - 70 m / s
Bullet weight - 11.4 g
Bullet diameter - 8 mm
Efficiency - 5.09%
At that time, it was the most powerful self-made portable gaussgan in the world. I wanted to make him a shop and sights, but this was not to come true, since my CSW was already satisfied. I had projects and more ambitious "vundervafel", but I gradually abandoned them and smoothly flowed into other areas of technical creativity.
About this gaussgan I was led to write this article . It briefly describes the device single-stage gaussgan, so I will not repeat. The meaning of a multi-stage gaussgan is that the projectile, after exiting the first coil, is immediately accelerated by the next one, and thus each step would add speed to it a little.
')
Since my knowledge and skills in the field of design at that time were small, I decided to do everything as simply as possible and without frills. The barrel was a 10mm brass tube made of a stroymag, a “receiver box” - a piece of galvanized profile, a “frame” - a sheet of PCB, and a square cable duct as a case. The thyristors were found in the radio parts store, the capacitors I dropped from the CRT monitors, and the optocouplers - from ball mice. Other details were found on the radio market and in the old household appliances. Next - a few pictures of the assembly process:
The diameter of the wire, the number of turns, the geometrical parameters of the coils, the capacitance of the capacitors, the prevention of optocoupler operation at each stage needed to be selected individually to achieve maximum efficiency, and to calculate the efficiency, it was necessary to carry out test firing with different types of bullets after each change - in short, such “fitting "Took quite a lot of time. I used nail clippings as bullets:
To charge capacitors from a 12v battery, I assembled a flyback converter, the power of which was enough to supply 220v light bulbs in full heat:
Also came up with a step controller on Schmidt's trigger:
When all the steps were already in place, I suddenly remembered that the Gaussgan needed a pen, for which to hold it, and a trigger. The body from the broken drill was used as a handle, and the trigger was a button from the microwave.
Here is what a ready gaussgan looked like:
A couple of test videos (I apologize for the quality in advance):
And now a little about the performance characteristics:
The energy stored in the capacitors is 550 J
Bullet Energy - 28 J
Bullet speed - 70 m / s
Bullet weight - 11.4 g
Bullet diameter - 8 mm
Efficiency - 5.09%
At that time, it was the most powerful self-made portable gaussgan in the world. I wanted to make him a shop and sights, but this was not to come true, since my CSW was already satisfied. I had projects and more ambitious "vundervafel", but I gradually abandoned them and smoothly flowed into other areas of technical creativity.
Source: https://habr.com/ru/post/176787/
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