Originally Posted by
Jane-DoH
Mad (Flt) Scientist
No. Wing-body is the term we use at my current (and indeed former) employer to mean the total lift of both wing and body, but excluding the tailplane contribution.
The tailplane reduces overall lift doesn't it?
CliveL answered the other one, and provided a very nice picture, so I'll just answer this one.
"contribution" may be positive or negative, but wing-body doesn't include it, whichever it is. Because it's generally a wind tunnel test thing, and you simply leave the tailplane (and indeed, anything else that takes your fancy) off the model.
Even when the tail IS fitted, wind tunnel models aren't (usually) tested with trimmed tailplanes, but rather with a range of tailplane angles to enable the tail effectiveness to be determined, so there certainly will be cases of both upload and download in most tunnel test sets.