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Post by chris t on Jul 8, 2015 1:34:32 GMT 10
I wish someone with a lot of no how with highbankers would make a video on set up riffle angle and distance between each riffle I understand every one has there own idea but I would love to see one made , it would be really helpful for the people who are just starting out .
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golddiggerart
Super Sluicer
I was born for a reason...
Posts: 381 
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Post by golddiggerart on Jul 8, 2015 2:24:39 GMT 10
Contact hardyakka mate.
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Post by 360search on Jul 8, 2015 12:16:39 GMT 10
Riffles angle size and spaceing depend alot on waterflow used in my experience.
Personally im moving away from too many riffles and just using expanded over carpet. Something of interest too look up in the mean time is sediment flows. Will be in touch soon mate.
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Post by chris t on Jul 8, 2015 19:11:26 GMT 10
So what size expanded metal would you use
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Post by 360search on Jul 8, 2015 22:44:24 GMT 10
I use im not to technical with how they measure it. Its 12mm accross by 8mm roughly and about 3-4mm in thickness.
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Post by chris t on Jul 9, 2015 17:10:23 GMT 10
The expanded I have is larger and the size is 100 mm by 40 mm and 12 mm
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Post by 360search on Jul 10, 2015 9:36:12 GMT 10
Thats big expanded see if you can get smaller stuff for more capture zones. All matting works just comes down to waterflow angle, once matting and riffles are in place.
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Post by chris t on Jul 10, 2015 12:04:22 GMT 10
Thanks I'll take some photos of my highbankers and your highbanker looks great
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Post by chris t on Jul 10, 2015 12:05:18 GMT 10
Oh would those riffles be about 3inches apart
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Post by Flying Scott on Jul 10, 2015 21:38:58 GMT 10
Expanded metal wouldn't be my choice of catchment.
The holes soon fill with gravel leaving a smooth firm base for gold and other heavy metals to pass over.
Angled bars give a more natural rock crevasses on river bed.
Flying Scott
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Post by chris t on Jul 10, 2015 22:45:54 GMT 10
What if you had the expanded and riffles
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Post by labrador on Jul 11, 2015 8:43:23 GMT 10
Reading this posting, I am getting more happier with my Angus McKirk, I have tried to prove it losses gold but so far I have not found any, panning tailings and re sluicing every thing, but unless I have done some thing like tipped it up, or overloaded it for the run. I have not found to much/ any that has go through.
So no expanded, no moss, carpet, no riffles, just gold.
Flying Scott is onto it, if the mesh or riffles don't let the heavy's replace all the other soils/rocks etc. There is no where for the goodies to settle in to the bottom and trap its self.
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Post by chris t on Jul 11, 2015 20:58:15 GMT 10
Hi Jamie there are so many ideas on riffles how would you build a riffle frame space between riffles and angle your opinion would be great
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Post by labrador on Jul 12, 2015 9:12:54 GMT 10
Hi chris t,
Big question you ask of me, But I will give you what I think.
Each riffle is own identy, so get the each one doing is job, and the room to do it, and the more the better.
A Z shape, take a top hat metal roof baton, cut in half,(upside down Z } as the water passes over the top, there is some back eddies behind it, and a low pressure zone.
Depending on the water speed and depth, there should be a spot between the riffles, that clears very easily, that sets the next riffle to do it job, so if you can see the top of each riffle and a relatively clear spot between each riffle, you halfway there.
I believe the secret is in creating this low pressure zone. some thing like where a tout sleeps.
How you build and fit it out, I don't know if your a metal or wood worker, but to build your own is enormously rewarding, and a challenge, I am still trying to finish mine.
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Post by chris t on Jul 12, 2015 9:28:22 GMT 10
Thanks Jamie I was looking at the Keene highbanker 173 and like the riffle set up they look to be about three inches apart can only try
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