ORIGINAL: Stickbuilder
I'm going to open up this can of worms again, but with the wing at zero (relative to the datum line) then would not the horizontal stabilizer be at 3 degrees positive with the leading edge of the H-stab higher?
Bill, AMA 4720
WACO Brotherhood #1
Take a look at every model you have in your hangar. There is a good chance that no two of them will have the same decalage.
But you will see some general "agreement" with similar type planes.