Nar not at all, we use HVO cause we are lazy, the cost and weight of fabricating a riffle system from flat bar is expensive labour wise, the bar, tube, angle or what ever profile deflects over long distances, so bigger wall sections come up and it ends up to heavy to be man handled. Then we have to add a lifting Device, this then must be certified, continuously. We are lazy.
Had two wash plants, designing the third. This one is 34% more compact fitting onto 4 x 45 ft drop trailers. But there is a wealth of experience here on the forum with fabricated riffles, no real answers posted. I am interested, I' ll go out on a limb here, and say that I am pretty sure that there would be other members whom would find it of interest and benefit.
Load content has nothing to do with it, this is a variable that is controlled by design, in that the width of the sluice, this will no change the ratio. The vertical or sloped issue I think is solved, no one is using vertical cause of the sediment retention factors and the failure to create the dead zone in hydraulic flow.
The issue of the forward( down sluice) or reverse riffle slope to has been defeated I think, forward riffles create the required hydraulic dead zone in the shadow zone of the rifle, reverse riffle design can do this, but requires substantial hydraulic increase, no gain.
So I think that if we everybody input their preferred design ratio wise, then we would find a correlation in the results, especially those who have progressed from the beta phase to versions d, e, f and so on.
I think a lot of members follow the posts, build their own projects, for some, half the fun, why not gather the wealth of experience into a ratio that could then be applied. Of course The progression of the ratio would be to have a table whereby H x width can be linked to required liters per minute, and ultimately pump size.
It's up to you guys I suppose, I noticed that the designs available have an inherent problem, you guys have the wealth of knowledge at this level of throughput, Jesus I 'll do the matrix equation to provide a table, even test it by building one off the table in the work shop and when it proves successfull it can be given away in a forum contest.
At the commercial level, yeah you pay for engineers, amongst other professions but the comprehension of the behaviors of gold is not something they teach. A talented prospectors eye, well now that's a commodity you just can't buy.
Food for thought
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