Should have added more info. I can run a 4" pipe a total of 90' in a slope that drops a total of 9'. OR, I can run that same pipe, just off level, for 85+' and drop through a sweep for that 8' or near straight down. I ruled out the sluice, because of all the debris where the water runs through the jungle before it gets to the opening I have to work in.
This is also on my own project that won't work, for lack of water and head. I'm just 'sperimenten.
Other Banki Turbine thread, is a far neighbor. just WISH I had his water.
Thanks for the info.