Search found 1590 matches

by iknowmy3tables
Wed Oct 13, 2021 10:00 pm
Forum: Pneumatic Cannons
Topic: A tale of two valves
Replies: 5
Views: 1838

Re: A tale of two valves

I stopped by my friend's place made a simple test shooting shuttlecocks made from bottles at 60psi vertically
by iknowmy3tables
Wed Oct 13, 2021 9:28 pm
Forum: Combustion Cannons
Topic: Cheap spark generator
Replies: 0
Views: 98

Cheap spark generator

Hey guys just a product heads up for a high voltage spark source. These days I notice Amazon won't ship cheap stunguns to areas even adjacent to areas with stungun restrictions, but I got mine under $6 this is cheaper, they go by a lot of names but look the same. It work's great will runs on an sour...
by iknowmy3tables
Wed Oct 13, 2021 9:06 pm
Forum: Pneumatic Cannons
Topic: Electro-pneumatic Eclipse with Air-burst rounds
Replies: 7
Views: 236

Re: Electro-pneumatic Eclipse with Air-burst rounds

You mention non-lethal are these gentle enough for say mil-sim or surprise gender-reveal parties
by iknowmy3tables
Wed Oct 13, 2021 4:14 pm
Forum: Pneumatic Cannons
Topic: Electro-pneumatic Eclipse with Air-burst rounds
Replies: 7
Views: 236

Re: Electro-pneumatic Eclipse with Air-burst rounds

Very impressive technology, what kind of application do you have in mind for these?
by iknowmy3tables
Wed Oct 13, 2021 4:08 pm
Forum: Pneumatic Cannons
Topic: Latest Eclipse Defense 37mm Pneumatic
Replies: 5
Views: 202

Re: Latest Eclipse Defense 37mm Pneumatic

Good to see more of your fine work, last time I saw your work was a video with jamie hyneman. Are you yourself active on any other platforms?
by iknowmy3tables
Mon Oct 11, 2021 11:14 am
Forum: Pneumatic Cannons
Topic: opinions needed on concept
Replies: 4
Views: 262

Re: opinions needed on concept

I see what you mean requiring positive pressure to open prevents the valve from opening every time you disconnect the air source, just need to machine more air seals.
by iknowmy3tables
Thu Oct 07, 2021 3:57 pm
Forum: Pneumatic Cannons
Topic: opinions needed on concept
Replies: 4
Views: 262

Re: opinions needed on concept

That's an interesting use of an air cylinder, but you really have the same effect from a QEV or a more common homemade piston valve. And as long as the air cylinder internal diameter is greater than the barrel diameter it should work fine. But I don't really see an advantage to using an air cylinder...
by iknowmy3tables
Wed Oct 06, 2021 3:04 pm
Forum: SpudFiles Discussion
Topic: Feedback for an idea I just had
Replies: 10
Views: 367

Re: Feedback for an idea I just had

Could you make something like a thick 1"+ diameter threaded rod longer than it needs to be, then the end user can saw it to length. I think spacing as low as 1" makes sense, for barrels 1.5" PVC and 2" PVC, chambers 3" and 4"
by iknowmy3tables
Wed Oct 06, 2021 2:46 pm
Forum: Pneumatic Cannons
Topic: Impulse Water Cannon any idea???
Replies: 3
Views: 303

Re: Impulse Water Cannon any idea???

Oh wow that's very different from what I guessed. It looks like a regular pneumatic cannon but it lets water in the barrel, it seems like they even aim it up to prevent the water from spilling out between shots. Besides making a fast opening cannon, put something on the muzzle to help create a vorte...
by iknowmy3tables
Wed Oct 06, 2021 11:15 am
Forum: BB, Airsoft, and Pellet Guns
Topic: What is 0000 buckshot used for?
Replies: 2
Views: 211

Re: What is 0000 buckshot used for?

Most people settle on 00 as the go to buckshot for defense because each pellet is reasonably effective, but some people value quantity as a quality of it's own. In Vietnam special forces favored 000 buck as the go to buckshot for the better coverage of the jungle, they also sometimes had duckbill ch...
by iknowmy3tables
Wed Oct 06, 2021 11:06 am
Forum: SpudFiles Discussion
Topic: Feedback for an idea I just had
Replies: 10
Views: 367

Re: Feedback for an idea I just had

Sounds like an interesting idea, I think an adjustable chamber to barrel spacer would be great.

Also clamp on ergonomic grips for blowguns and control values
by iknowmy3tables
Wed Oct 06, 2021 10:09 am
Forum: Pneumatic Cannons
Topic: How far does it go!
Replies: 2
Views: 183

Re: How far does it go!

My mistake I forgot your initial question of how far does it go,
Expanding the math a little bit ideally it flew 695meters or 2281feet
It's probably short of that distance a good bit because that doesn't factor drag resistance, is anyone here familiar with drag coefficients?
by iknowmy3tables
Wed Oct 06, 2021 9:45 am
Forum: Pneumatic Cannons
Topic: How far does it go!
Replies: 2
Views: 183

Re: How far does it go!

Holy moly, looks like you're trying to blow up the moon friend, lol Let me dust off my old that math part of my brain, I can't factor for wind resistance but I got 89.64m/s or 294.1fps as your estimated velocity work math attached That's only based on the flight time and the initial angle and assumi...
by iknowmy3tables
Wed Oct 06, 2021 9:15 am
Forum: Pneumatic Cannons
Topic: Impulse Water Cannon any idea???
Replies: 3
Views: 303

Re: Impulse Water Cannon any idea???

The link is lost but I presume you're talking about the spyra water gun with that big Kickstarter campaign. I would look at a water pump like this 12volt RV water pump with a built in 80psi cut off https://www.amazon.com/dp/B074MZYS37/ref=cm_sw_r_apan_glt_fabc_MK5936AWFRVX9PYWN9DA?_encoding=UTF8&psc...
by iknowmy3tables
Thu Sep 16, 2021 6:47 am
Forum: Pneumatic Cannons
Topic: A tale of two valves
Replies: 5
Views: 1838

Re: A tale of two valves

Lol, I see what you're saying a lot more energy in the larger one used inefficiently. I'll make a video next time I visit my friend. Not a strictly controlled test but the large cannon was filled to something like 80psi the small cannon filled to a fraction of that shooting the same tennis ball we s...