> > I checked it, and while I'm able to reproduce the calculation, I'm not > able to reproduce the numbers: my results are an order of magnitude and > change larger. There could be any number of reasons for that: I might > have botched the math, or a units conversion, or chosen significantly > unrealistic values for some of the other parameters required (like > viscosity or fluid velocity). Or my fluid mechanics may be rustier > than I thought. > > But that's, I think, just one more reason why we should be dispensing > with all these estimates in favor of a direct measurement: the Pitot tube > method should yield a value for total fluid discharge accurate to better > than 1%.
Yup. It's an absolutely valid argument that the reason we're stuck with people pulling numbers out of their butt, is that there's really nowhere else to pull said numbers from.
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