Відео

If the snowball is packed hard enough or a saboh is used

Yes same here

Good luck! Stay safe, have fun, and learn a lot. I'm sure it'll be a hit at your school.

I know I've mentioned it in the video but please pay attention to the warnings. It's a risk pressurizing PVC as its not intended for it, so while nothing can be fully safe when doing so, err on the side of caution and use lower pressures. As for the build itself, make sure you take your time to fully seal the sprinkler valve as shown, and properly seat the diaphragm when you reassemble it. Air leaks are the most common issue you will see with this, and even more so with the valve as its more complex than simply gluing PVC together.

They legitimately were saying that. I saw my neighbors across the street watching me film the street launches from their front doorway. Their young son was interested in the device, so of course I had to give him a chance to activate it if his parents agreed. They did, I loaded everything up, gave him my the controller and my earmuffs, and he got to launch a full volley. He absolutely loved it and Immediately looked over to his mom with a big smile on. It was easily my favorite day of filming seeing how excited he was after the fact.

You can tell if the solenoid is working by the click it makes when it activates. The honking is likely from some sort of air leak with the diaphragm. Check to make sure it is oriented and seated properly. There will be a brief moment when air escapes as the chamber pressurizes, but once it is full pressurized the diaphragm should seal and this should stop.

@ thank you :) I got a larger solenoid unit and it helped out :)

Glad you got the chance to see it! It was a lot of fun to make. I've always been a fan of ridiculous builds just for the fun of making something, rather than some utilitarian purpose (although I like those too of course).

I've never actually tested this. The biggest factor even for light objects is a proper seal, one that doesn't introduce excess friction, so it will vary widely by the objects shape.

My apologies for the delay. This setup is good for a single shot as there is no means to partition or otherwise partially release the air reliably.

It's a special feeling indeed, glad you can appreciate it too!

So glad you enjoyed the humor! Thanks for watching.

... I have made a critical error. Who knew they could go to 11. I'll have to make another. Enjoy your superior sound, you are the clear winner here.

Love it. Send me the link when you post the final cut!

Of course, it's a great question. Notice that the blow gun is mounted to the sprinkler valve on the side where (internally) the diaphragm contacts the spring. When you pressurize the cannon, you may be able to hear a small amount of air escaping the barrel. This is because it takes time for the air to pass through the small opening in the diaphragm to the spring side of the valve. Eventually, enough air is on the spring side of the valve that the air pressure and spring tension together are able to seal it off since they now overcome atmospheric pressure. When the trigger is first pulled, a small amount of air rushes out through the blow gun as you'd assume. You can feel this by holding your hand in front of the blow gun opening. The thing is, all that tank air pressure wants to equalize as quickly as possible with the atmosphere. When the "flood gates open" from pulling the trigger, all that air tries to rush out at once. Because of the pressure drop from the air exiting the blow gun, the diaphragm opens slightly, providing a second path of exit for the pressurized air. The air then tries to rush out both the blow gun and the barrel simultaneously, but you'll notice that inside the sprinkler valve on the diaphragm itself there is only that small hole for the air to pass through (through the small white plastic piece in the diaphragm). Initially, the only exit for the air was out the blow gun. Now with the diaphragm slightly opened it is easier for the air to pass through the large open barrel than it is to rush through the small opening of the diaphragm and out the blow gun. Pressurized air chooses the path of least resistance and tries to exit as rapidly through the barrel as possible. This causes the diaphragm to be forced open as the air pressure overcomes the spring tension. The air rushes out the barrel in one big burst and the cannon launches. Once the pressure equalizes to atmospheric pressure again, the spring tension resets the diaphragm and the process can repeat. All this is happening in a fraction of a second so it's hard to tell when one "phase" of the action occurs, but that's the order of operations each time you pull the trigger.

@@HardwareUnknown wow! Thanks for your great answer!

They're Ergon GP5s. There are multiple versions, with the lower the number meaning a shorter side handle. 5s are enough for your whole hand whereas 2s and 3s are more for a finger or so. I've got a link in the description to make it easier to find. You can also find them at some REIs.

Thank you! I'm glad you enjoyed, hope it was helpful for performing your own modification

a bit like the stuka (i mean the effect)

Hey, the comment cut off, can you edit it to add what's missing? I want to be able to give you a proper answer.

Is it leaking out the connection between the valve and the adapter? If so, you may need to simply crank it down a bit harder (be careful, you can do this too much, but perhaps it's looser than you think). That, or add some more PTFE tape before tightening.

I used a 1/4" NPT tap for the fittings. Here's the one I bought: amzn.to/2U3NyoO All parts/tools are listed in the description in case you need any others as well.