No real disagreement over the airway either minimising or promoting condensation, Pee Bee.
Maybe we could all agree that the more curved the airway (or, the more curves in the airway), the more condensation there will tend to be in it. I.e., if a billiard smokes wet, something's wrong with it that can be fixed. An Oom Paul, on the other hand, has condensation built into it by design.
The fancy name for it is centripetal force. The higher the speed and the sharper the curve, the more of it there is condensing the little mini-droplets of water vapor in suspension into moisture in the airway. It's the same deal whether it's a smoke stream in a pipe, gasoline going into your car through a hose or whatever else you can think of. Curves and changes in diameter create turbulence, which produces condensation.
One spot where this happens in an 80S that can be improved, simply and cheaply, is the end of the tenon. Countersinking this can make the transition into the stem less abrupt. (Just about any pipe with headspace between the face of the tenon and the shoulder of the mortise can condense here. Strangely though, not all do, or do to an extent that's bothersome). (Back to pipes being female again).
:face: