ORIGINAL: kerwin50
Most of the biplanes I've flown have a positive decalage. That is the top wing is positive to the lower wing.
The postive gives the plane more lift.
True....Decalage is the angular diference in incidence between the upper and lower wings, obviously relative to the h-stab, but generally speakingdecalage is normallypositive. I wouldnt say having a higher decalage number provides "more" overalllift, but it would offer a higher AOA. Would also increase the drag beyond a certain point. Youd still have to offset it all with the proper DT if you wanted...