Bazooka Gold Trap length

[arizau]

I'm not sure if this has been discussed before but it occurs to me that the length of the device and the concurrent increased scoop opening size has a relationship with the minimum necessary operating flow speed in that a longer one may still work efficiently in a slightly slower current than what is required by a shorter version of the same model.* Is this the case?

*I think this relates to the venturi effect by increasing the pressure before the restrictions of the tubes and results in a proportionate speed up of water through the tube openings compared to the shorter sluices. https://www.google.com/webhp?source...1US513&ion=1&espv=2&ie=UTF-8#q=venturi+effect

 

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[Aufisher]

I set up a 36" and a 48" last weekend. I didn't notice any difference in the flow requirements. Sometimes it can be harder to find a nicely sloped 4 foot section of creek where the 3 footer will drop in easily.

 

[Aufisher]

4 footer foreground 3 footer in background.

 

[Duckwalk]

Did you have to dam that on your own or is that a natural dam?

 

[Aufisher]

Hand built