as has been pointed out, the individual resistances can be simply added
but this sum will be 'correct' only at that specific flow rate as each component's rate of variation is different
and consider the potential accuracy, 15% would be unusually good
this is due to the quite small 'individual' resistances being measured; the instruments' accuracy and the substantial effect of rounding errors
Null-A Ben
if you are going to calculate; use the Chevette hc data, it is much more accurate
what a pleasant thread without having to push a rope uphill
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