HA-VI

Harness the power of precision mixtures of pressurized flammable vapor. Safety first! These are advanced potato guns - not for the beginner.
User avatar
hectmarr
Corporal 3
Corporal 3
Argentina
Posts: 792
Joined: Sat May 07, 2016 3:49 pm
Location: Argentina
Has thanked: 25 times
Been thanked: 24 times
Contact:

Wed Jun 10, 2020 1:24 pm

I am trying some ideas to simplify my weapons as much as possible.
This new sistem has the following advantages:
1- It has no piston
2- It has no spring
3- It does not have a rupture disc
4- It has no solenoid valve
5- It has no dead spaces between the combustion chamber and the firing barrel

The 1/4 "steel bb`s charger is magnetic so it has no battery. Just a pair of neodymium magnets.
The combustion chamber is cleaned by a small amount of accumulated aire that enters 6 bar, which is the pressure that triggers the prototype. When injected with this pressure into the combustion chamber, after firing, the required amount of air is very little about 30 cm3. Previously, I injected air without pressure, that is, at much less speed and it was necessary, in the past, much more air that damages autonomy.

After testing many times a simple oring of the appropriate size, it is enough to retain the butane air mixture inside the combustion chamber safely, so no other system such as rupture disc, piston, or valve is necessary.
In the diagram it is seen that there are no dead spaces between the cimbustión chamber and the barrel, so this problem does not exist here.

The pneumatic system does not use an electrovalve, which eliminates, in the future, having to work up to 7X, which is what these valves for public use support. Everything is in the diagram.
References:
A- Butane volumetric dispenser
B- Butane accumulator
C- Three-way, two-position valve, actuated by air pressure (normally closed).
D- Three-way valve, supply.
E- Air accumulator to clean the combustion chamber of burned gases.

The bb`s charger uses two main magnets, which drag the steel body that seals and opens the bb`s charger, through the combustion chamber, which does not have any mechanical contact with the magnets.
You need two main magnets, to keep the forces balanced in the steel core with the walls of the combustion chamber. I have tried using only one, but having only one-sided attraction, the friction is a lot and tends to get stuck. The magnets with 12 mm prisms of 20 mm x 10 mm x 10 mm, very powerful.
The secondary magnet, the small one, is in charge of only one bb entering the chamber, because by anchoring it to the wall of the combustion chamber, it does not give rise to another occupying that same place. Batteries and solenoids are no longer required. The central body exerts enough force to press the bb a little against the retention oring.
The ammunition carrier tube is part of the combustion chamber. The reason is simple. When this tube is not under pressure and it opens suddenly when combustion occurs, the spring that compresses the bb`s is destroyed because the balls try to use the tube as a "secondary firing gun" ... The solution is to let it be part of the combustion chamber, and the small spring does not suffer much. It is like in the drawing.

I leave a pictures of the experiment weapon. The woods are dear to me, because they are the first autonomous hybrid I built. It is still useful for me to test the designs. :)
Soon, I will record a video to clarify everything.



Cargador bb´s magnético.png
Cargador bb´s magnético.png (18.75 KiB) Viewed 218 times
HA -VI.JPG
Cargador magnético bolillas acero 6,35 mm (2).JPG
Cargador magnético bolillas acerp 6,35 mm.JPG
Attachments
Unidad dosificadora para híbrido con depósito de aire.png
Unidad dosificadora para híbrido con depósito de aire.png (31.27 KiB) Viewed 218 times
Ideas don't make holes. The weapons yes! ;)
User avatar
hectmarr
Corporal 3
Corporal 3
Argentina
Posts: 792
Joined: Sat May 07, 2016 3:49 pm
Location: Argentina
Has thanked: 25 times
Been thanked: 24 times
Contact:

Wed Jun 10, 2020 5:17 pm

I have prepared an animation of the pneumatic system. The explanation is as follows. I hope my explanation is understandable ... :?
In the first table: When the valve is opened, the mixture is charged in the combustion chamber and at the same time, the accumulator is charged with pressurized gas. The valve lets the gas through because it is activated by compressed air, but it cannot enter the dispenser, because the air pressure is higher than that of butane.

In the second table: When the main valve is closed, the dispenser remains at atmospheric pressure. All surplus gas escapes via line 3 of the main valve. At the same time, the gas inlet of the tank is blocked because the gas valve is closed.

In Table 3: After firing, the accumulated compressed air sweeps the burned gases out of the combustion chamber and out through the firing barrel. The gas inlet is blocked and compressed air is blocked by the closed main valve.
Sistema neumático HA-VI Animación.gif
Ideas don't make holes. The weapons yes! ;)
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 25737
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 68 times
Been thanked: 46 times

Donating Members

Fri Jun 12, 2020 3:39 am

Re-hosted the image so it appears animated in the thread:

Image

A simple idea but at the same time complex in its execution... it looks like it should work!
hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
hectmarr
Corporal 3
Corporal 3
Argentina
Posts: 792
Joined: Sat May 07, 2016 3:49 pm
Location: Argentina
Has thanked: 25 times
Been thanked: 24 times
Contact:

Fri Jun 12, 2020 9:33 am

If it works well. It is quite difficult to explain, this for me. The dynamics of the gases in the system is like in a two-stroke piston engine, where the mixture intake and the exhaust coexist at the same time inside the cylinder, something similar. Thanks Jack for hanging up the animation.
Ideas don't make holes. The weapons yes! ;)
Post Reply