Search found 25942 matches

by jackssmirkingrevenge
Thu May 13, 2021 9:30 am
Forum: Pneumatic Cannons
Topic: Issues with the GGDT software
Replies: 5
Views: 375

Re: Issues with the GGDT software

Could someone explain the valve settings? My air cannon uses a 1'' ball valve, but I don't see any options in the settings for that. For a ball valve, select "generic valve" Leave the flow coefficient at 45% Seat diameter would be 1 inch You'll have to estimate the opening time depending on how you...
by jackssmirkingrevenge
Sun May 09, 2021 9:08 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Semiauto Nerf Rival with no moving parts.
Replies: 12
Views: 548

Re: Semiauto Nerf Rival with no moving parts.

I've had this issue with o-ring detents and pellets, the head pops through but then the tail gets stuck on the o-ring.
by jackssmirkingrevenge
Sun May 09, 2021 8:53 am
Forum: General How-To & Discussion
Topic: "In the world of spuds today"
Replies: 2444
Views: 211274

Re: "In the world of spuds today"

Apparently it was a "hot" loaded round, he was very lucky that one of those lugs didn't kill him.
by jackssmirkingrevenge
Sun May 09, 2021 7:32 am
Forum: Pneumatic Cannons
Topic: How to make an Air cannon sound cooler/louder?
Replies: 17
Views: 520

Re: How to make an Air cannon sound cooler/louder?

Do you know where they are bought commercially? I'd like to show people that they have an air deterrent project and they need to increase the noise from the markers. If you search for "airsoft amplifier" on places like eBay or Aliexpress you'll find plenty. Other useful key words include "Sound Hog...
by jackssmirkingrevenge
Fri May 07, 2021 12:05 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: WORKING Simple Semi auto mechanism
Replies: 4
Views: 234

Re: WORKING Simple Semi auto mechanism

For rubber balls a simple breech like farcticox1 made here would do the trick, paintballs would get smashed though.
by jackssmirkingrevenge
Fri May 07, 2021 10:52 am
Forum: Hybrid Cannons
Topic: Xtreme-patator
Replies: 11
Views: 383

Re: Xtreme-patator

hectmarr wrote:
Fri May 07, 2021 10:27 am
wow is supersonic!! :o
I imagine some of your creations also exceed the speed of sound ;) even though your projects focus mostly on function and not maximum performance.
by jackssmirkingrevenge
Fri May 07, 2021 10:47 am
Forum: Pneumatic Cannons
Topic: Whats best valving for pneumatics
Replies: 5
Views: 286

Re: Whats best valving for pneumatics

Would the quickness of releasing the slide valve make any difference on a QEV to the speed of the projectile being launched. Faster piloting means faster valve opening which means better performance, to a point. Here is a virtual launcher modeled in GGDT: https://i.imgur.com/jaMwUuq.png As it is, w...
by jackssmirkingrevenge
Fri May 07, 2021 10:14 am
Forum: Hybrid Cannons
Topic: Xtreme-patator
Replies: 11
Views: 383

Re: Xtreme-patator

Voila with a 1 meter barrel:

Image

50cm barrel gives 319 m/s and 43J, 66cm gives 356 m/s and 53J
by jackssmirkingrevenge
Fri May 07, 2021 10:04 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1492
Views: 146950

Re: Short question topic

In this specific case, 1.8K means 1.8 psi x 1000, it is 1800 psi, about 124 bar. Thanks for your answer. I confirm that is the case, a 1800 psi burst disk is typically one you will find on the exit side of a 850 psi regulator on a paintball bottle. A 3000 psi bottle will typically have a 5K disk, a...
by jackssmirkingrevenge
Fri May 07, 2021 10:02 am
Forum: Pneumatic Cannons
Topic: How to make an Air cannon sound cooler/louder?
Replies: 17
Views: 520

Re: How to make an Air cannon sound cooler/louder?

The picture looks like theres more things going on, such as holes in the cone, and it looks like its disconnected from the barrel? While also being in a cylinder. The example I showed you is adjustable, with holes in the cone that allow you to vary the amount of noise. When the holes are completely...
by jackssmirkingrevenge
Tue May 04, 2021 8:00 am
Forum: Pneumatic Cannons
Topic: How to make an Air cannon sound cooler/louder?
Replies: 17
Views: 520

Re: How to make an Air cannon sound cooler/louder?

In my experience it amplifies the noise significantly for the shooter too.
by jackssmirkingrevenge
Sun May 02, 2021 8:12 am
Forum: SpudFiles Discussion
Topic: Well hello!
Replies: 1
Views: 252

Re: Well hello!

always good to see old faces pop-up again :)
by jackssmirkingrevenge
Sun May 02, 2021 8:11 am
Forum: Pneumatic Cannons
Topic: A look inside the "bleacher reacher" t-shirt launcher
Replies: 16
Views: 6118

Re: A look inside the "bleacher reacher" t-shirt launcher

I don't have pictures but if I recall well it was a simple poppet, much like a blowgun valve.
by jackssmirkingrevenge
Sun May 02, 2021 8:09 am
Forum: Pneumatic Cannons
Topic: Basic pneumatic cannon
Replies: 2
Views: 191

Re: Basic pneumatic cannon

A nice old school PVC/Sprinkler setup, looking good!