fast68, ..

interesting, .. so if you do the math with temp corrections to get a CFM number it always comes out the same?
My bench, .. like with themp corrections, . if the intake and discharge temps are different, .. when I do the corrections I get the same CFM, .. and the inclined always reads the same, ..
but if I don't do the temp correction the CFM number is wrong, ..

I tried the same thing with a Baro correction and it had an effect, .. VERY minor but it did seem to have an affect.

Could it be I'm being too anal????

I'm not worried about the final CFM number as much as I'm worried about the curtain area coefficiants.

Curtis