Starwars didn't come to mind, a plastic low pressure version of the decimator with the sides rotated came to mind. Actually, I saw the decimator as the glue on this valve was drying... haha I thought i was being sorta original. But i guess not. So, MrC Why would the air chambers be more efficient i...

The 1200FPS reading needs further testing.... but bear in mind that the barrel i used for that test was WAY longer. probably around 5'

I love the sound of that last shot.

Congrats mate!!! i am hoping to do the same very soon.(I may already have..... woot)

All right children... i built a chronny: http://www.spudfiles.com/forums/home-made-infared-chronograph-how-to-very-acurate-t19209.html At 120, psi... the most i will take a sprinkler valve up to, i hit around 850 FPS my NEW cannon: http://www.spudfiles.com/forums/piston-in-a-cross-cannon-t19231.html...

Go back to home depot.... and make a 1'' piston valve. Use a 1'' wood dowel for the piston.. and some rubber from an extra boot for the sealing face... thats what i did... apart from the boot.. lol http://www.spudfiles.com/forums/piston-in-a-cross-cannon-t19231.html In that gun... i put the valve in...

So heres what I got: Barrel .5'' or 1'' chambers: APROX (1''x16'') each Piston valve housed in a cross piece.... works juts like a t Pilot... modded 1'' sprinkler valve. This gun was clocked at 1200 FPS with my homeade chrony http://www.spudfiles.com/forums/home-made-infared-chronograph-how-to-very-...

jhalek90: How did you launch the bouncy ball? Mach 1 is pretty unlikely, even anything over 1000 FPS is pretty unlikely without a very serious cannon. The second time domain is the time from gate to gate. Usually the sound card won't have any problems with this time (and frequency) domain but the a...

Dang. that looks wicked.

Can we see some damage por... i mean pics.

thanks tec. I must post pone my HOW to for A few hours... while i run a few more tests....It would appear that i have a bouncy ball traveling at 1200+ Ft/s is it possible that i have hit mach1?? with a bouncy ball??? This is why i need more tests... i am a little bit, skeptical of that data... altho...

@jimmy: Man, you know what your talking about! 44100 samples each second make a lot more seance. The symbols, i found on google... not sure if they are right... ill fix it when i write up a good how to today. As for the RED leds.... i am going to use infrared to reduce and interference... and also.....

The 1'' bouncy ball pistol. at 35 PSI Thought so, fairly good for such a small launcher and low pressure. Sounds about right, 240fps with that cannon. Yes, i was quite happy with that shot, for only using 35 Psi. haha Here is a simple wiring diagram i just made in photoshop.... not to good... but e...

PS: in the file above, a bouncy ball was clocked at 238.09450... FPS Not bad, what cannon was that with? BTW, if you clean the topic up and make it more clearer and easier to follow with some pictures and diagrams to help, me or another mod might sticky it. There are other how-to's like this, but i...

here are a few samples files. http://img27.imageshack.us/img27/2082/testfile.jpg http://img33.imageshack.us/img33/6599/testfile2.jpg 3 points/0.0005 seconds 1/0.0005=20,000 samples.... but there are 3 per 0.0005 so 20,000x3=60,000 samples/second. If my numbers are correct. PS: in the file above, a b...

jonnyboy wrote:Nice although the website you linked to is jimmy101's (or something like that) I don't know if he posted a how to on it but hes defiantly linked to there before.

I am not trying to claim it as my own design, i said that the site was not my own.

~Jhalek90

I have been looking around my town for a place where i can use a chronograph, but have been unable to find one. The paint ball store wont test homemade guns, the gun ranges will only test explosive powered, lead flinging weapons. I got the same answer every place i tried. The paintball store, howeve...