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Blocked vortex internal pressures

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Blocked vortex internal pressures

Unread postAuthor: farcticox1 » Fri Jul 24, 2015 5:24 pm

In a blocked vortex setup is the pressure inside the BB hopper feeding the vortex equal to the supply pressure? or is it a lot less due to the venturi effect?
Just wondering how robust I need to make a vortex hopper. :idea:
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Re: Blocked vortex internal pressures

Unread postAuthor: Ragnarok » Sat Jul 25, 2015 10:16 am

When you say blocked, are you referring to a vortex block or the possibility of a projectile jamming in the barrel?

In normal operation, the BB hopper will be at a somewhat lower pressure than the supply pressure - due to Bernoulli's principle (this more general concept applies better here than the specific application of the venturi effect) there's a pressure loss due to the flow rate.
Also, the hopper is basically constantly leaking air out of the barrel, so as the hopper pressure rises, this leaking rate increases, and the flow from the supply decreases (as the closer it gets to the supply pressure, the less pressure difference there is and thus less flow), so the hopper pressure will naturally tend towards a point where these two flows are in equilibrium.

The vortex block will make some difference compared to a cloud design, as the improved feeding of BBs will reduce the amount of time the barrel is freely venting air, but the exact numbers will depend on the specific BBMG.

However, if the system jams, the hopper pressure can theoretically reach the full supply pressure. To be safe, you should really build your hopper to this specification.
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Re: Blocked vortex internal pressures

Unread postAuthor: mark.f » Sat Jul 25, 2015 11:48 am

Look who decided to show up. :P
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Re: Blocked vortex internal pressures

Unread postAuthor: farcticox1 » Sat Jul 25, 2015 3:07 pm

Yes, I guess a blocked barrel would result in full pressure build up.
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Re: Blocked vortex internal pressures

Unread postAuthor: Ragnarok » Sun Jul 26, 2015 9:23 am

mark.f wrote:Look who decided to show up. :P

Benedict Cumberbatch?? Where?
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Re: Blocked vortex internal pressures

Unread postAuthor: Fnord » Wed Aug 05, 2015 8:00 pm

Ragnarok wrote:
mark.f wrote:Look who decided to show up. :P

Benedict Cumberbatch?? Where?

No, it was just Hasselhoff again. Nothing to see here.
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