"In the world of spuds today"

[DYI]

ITWOST, my summer project is finally posted. I won't be building anything shooty for the next eight months, owing to university, but I'll hopefully get some simulations written in between class work.

[Labtecpower]

Trying my new ignition system, and the repaired barrel.

[youtube][/youtube]

I thank DYI for making this look pathetic

[Gun Freak]

Tested pengun today, turns out piston was too loose and it wouldn't pilot with the schrader alone. I took the core out and disconnected the pump after filling it and it will fire like that, but I don't like that. I heated the cylinder with a propane torch and the schrader slipped right out I'm worried the heating had an effect on the stainless steel chamber though. I quenched it and cleaned the epoxy off the inside of the chamber and the schrader and now I'm making a new piston.

[jackssmirkingrevenge]

I thank DYI for making this look pathetic

Still looks impressive, good job

[jhalek90]

ITWOST, tested a dart, designed for penatration, and found that with HPA It was quite happy going through 12" of ballistics gel, and my steel toolbox...

[Crna Legija]

I heated the cylinder with a propane torch and the schrader slipped right out I'm worried the heating had an effect on the stainless steel chamber though.

I wouldn't be too worried, i doubt you got it hot enough to weaken it permanently also the tube is proboly the last thing that will break when your using epoxy plugs

[jackssmirkingrevenge]

through 12" of ballistics gel, and my steel toolbox...

Was that last one intentional

[jhalek90]

[quote="jackssmirkingrevenge"
Was that last one intentional [/quote]

Sadly no.

I made an assumption (Doh!) that a foot of ballistics gel would stop the round.... i guess a heavy stainless steel dart (1/4" diameter) traveling at high speeds is hard to stop.... haha

Also, the 300-350psi (aprox.) fast valve, and a 4' barrel did not help slow it down either.... lol

[Gun Freak]

Dunno if this deserves it's own topic, you guys tell me
http://i979.photobucket.com/albums/ae27 ... e3f6c2.mp4

[Gippeto]

Sounds like thou hast the dreaded "tank ping"...better post it.

[Gun Freak]

Tank ping? What the heck is that I'll post it later, I'm at school.

[Gippeto]

Hmm...quieter in the shop this time...not tank ping, it's the initial hit on a can?

Tank ping is caused by a pressure wave within the reservoir of a pcp striking the end of the reservoir.

Check out Ted's Holdover on youtube...you'll hear it every time he shoots the EdGun. Might be a bit graphic...in the event that bothers you.

[Gun Freak]

I'm pretty sure it's the can, because it sounds ok when I shoot it at anything else or dry fire it.

[SpudBlaster15]

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[Gun Freak]

In the world of spuds yesterday?