@cathar: In my tests with a top and 34 jets a 1.2mm, the main pressure drop came through the microstructure of the base and not through the chamfered jetholes. I testet this with a sumbmerged pump (resun sp980) and a basin and watch for flowmeasurement in my bathroom and got completely different values.
So i don't know where you have your data from, but i have different data.
I completely disagree that the jetlegth is responsible for anything under 10% of the pressuredrop inside any jetblock, because of my different results when measuring it with my prototypes.
@Miladou: Yes, but wait till i post the final pics, then i can also post cad drawings and so, but i don't wanna post pics before the production isn't finished and i have photos of the blocks (until now i have only about 20 different prototypes)
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