Alan J Fletcher <[email protected]> wrote: If you mean my numbers -- Given 75% dry I just read off the wattage on the > Nasa diagram. Steam quality on the T-h diagram is linear between points B > and C. I grew up with REAL instruments, where one learns to read a scale to > about 5% accuracy between tick marks. >
Amen! People are obsessed with meaningless extra decimal digits of precision these days. After electronic calculators were invented, my mother said it is a shame people don't learn to use slide rules anymore, because they don't realize that 3 digits of precision is fine for just about any purpose. Granted there were many over-engineered dams and airplanes in the old days, because engineers depended on slide rules and could not risk cutting it close. - Jed
