I am in the process of building my first pneumatic air gun which is a mini coaxial. I have made the piston out of a short length of pen cap which has been filled with hot glue and has a piece of 3mm rubber as the sealing face. There is no visible gap but It slides easily down the tube. It also won’t...

I have been using PVC potato cannon for about 2 years and I decided I wanted to make it shoot further. I use a grill igniter/spark plug wired up to 2 screws inside the combustion chamber to ignite the hairspray. One way I knew would make it shoot further was to wire a certain way with more screws to...

Cute! What are you up to? You have to wait a few days, surely, to find out ...

I have been using PVC potato cannon for about 2 years and I decided I wanted to make it shoot further. I use a grill igniter/spark plug wired up to 2 screws inside the combustion chamber to ignite the hairspray. One way I knew would make it shoot further was to wire a certain way with more screws t...

I am interested in the possibility of shooting 6mm plastic pellets without any mechanism. The idea is that the tube that contains the bbs, is hermetically closed At one end, it's gravity feed. When air enters, only one bb propels through the firing barrel. All the Others are driven up into the tube ...

Yes, I have taken into account the point that you make. The charger cap has a rubber so that the bb that can stick there, is not destroyed. I reuse the same bbs many times, so I know they come out intact. Keep in mind that the balls fit quite well in the loading tube. This makes the air contained in...

Beautiful stick that shoots! It amazes me that it is from the mid-19th century, and it still works, with the repairs and adaptation that you did. It is a pcp from 1860! On the other hand, I hardly saw it, I thought about making one for my grandmother, so that when they want to steal it on the street...

No sé sobre tu abuela, pero la mía definitivamente habría sido un peligro mayor para los peatones inocentes si le hubieras dado uno de estos :rollo: :D Well, I'm going to drop my black humor mouth. I'm actually going to build two of these to give to my father-in-law and mother-in-law, once the gift...

Beautiful work. This thing is cool. The spacing issue between faces reminds me of the headspace of a rifle; it has to be just right. I like it.

Nice! That mainspring certainly is the "folded from a piece of spring steel" kind from percussion and flintlocks. Absolutely beautiful and amazing it still works today compared to modern springs from only a few decades ago. :D How finely have you tried adjusting the distance between the barrel and v...

Another option that I like is a double barrel machine gun. I would only use a 5/2 solenoid valve, but with all its inputs and outputs. The guns alternate one and one when firing, because a shot occurs when the solenoid valve is activated and also, when it is disabled. With this arrangement, it is po...

Wow! in love at first sight with this pair of cannons! :D She had never seen it even in photos. Excellent choice of yours, and I agree that it can be perfectly adapted to the type of machine I designed. On the other hand, the video is very good, I mean the animations. I already subscribed to that ch...

I guess the verdict's in ;) Yep. With over a hundred views, only 4 people expressed a definite opinion. 2 more (myself included) stated that they didn't care (an option, in fact, which should have been "I couldn't care less", another case of overpondian mutilation of the beloved mother tongue), and...

the bottle is actualy steel That's a good sign. Steel is far more resilient than aluminium. so it is has a working pressure of 1800 psi- 124 bar.... No, it *had* a rated working pressure of 1800psi, for CO2 only, in March 2001 when it was last hydrotested. Not sure what the acceptable period betwee...

Really getting into the Nerf stuff and transformed my airsoft bullpup into a single shot muzzle load pistol by turning the grip and trigger around, barrel is a piece of 1" round nylon that I drilled to take the Nerf dart, these are actually X shot darts which work much better as they have like a rai...