Schrader Valve as dump valve?

[Tempest]

Hi everyone. This is my first project and I'm wondering if my design is feasible.

I plan to attach a schrader valve (bicycle tyre type) to a hpa tank .The idea is, when a striker pin touches the schrader valve momentarily, it will trigger a sudden burst of air and fire the gun..

The striker pin is activated by way of a rod from manually- cocked nerf gun.

I'm open to ideas as long as it is not too complicated. Thanks

[farcticox1]

Yes, Leslie Proper uses schrader valves

[youtube][/youtube]

[Tempest]

Interesting build by Leslie. I'm wondering why people who steer away from this using schrader as dump valve? Is it inefficient?

[Tempest]

I'm also wondering if there are ready made solution that i could purchase for a valve that screws in the top of HPA tank..

[jackssmirkingrevenge]

Welcome to the forum!

I'm wondering why people who steer away from this using schrader as dump valve? Is it inefficient?

Extremely poor flow, more or less equivalent to a 1.75mm / 0.07" diameter hole, meaning it is only suitable for very small calibers and high pressure if you require reasonable performance.

I had tried one as a valve for a repeater, turned into a high pitch farting machine:

[youtube][/youtube]

[Tempest]

Welcome to the forum!

>> Thanks. Been a lurker for a while. Wonderful people and ideas in here

I had tried one as a valve for a repeater, turned into a high pitch farting machine:

>> Didn't expect this..but sure is funny. You've certainly save me time and headache with this one.

I've come across two other possible :
the screw on tank valve:




or the explosive air release valve on instructables:
http://www.instructables.com/id/Airgun- ... ase-Valve/


any advise on which one works best is much appreciated