Why is this a flow killer?
I may be completely wrong about this, but I always thought power was lost mostly because of differential height (mgh)?
Of course a little bit is lost because of the restriction the internal edges hoses have (yes, I know that sounds confusing), but AFAIK there are much better candidates for 'Flow Killer 2005'.
Sorry for my English. I'm always confused about how to express myself when I'm talking 'scientifically'.
Maybe in this case '(b)rim' is a better word instead of 'internal edge'?
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