Most civil multiengine jets and some civil multiengine propeller aircraft have engines mounted in nacelles on the ends of pylons extending some distance away from the wing or fuselage. Wing-mounted engine pylons generally extend vertically from the lower (or occasionally upper) surface of the wing; in contrast, fuselage-mounted engine pylons tend to stick out horizontally from the (almost always aft) fuselage.
In some cases, this horizontal pylon surface can get quite large:
(Image by Arjan Meijer at Twitter, showing a propliner under development by Embraer with turboprops on empennage-mounted nacelles, necessitating quite long pylons to allow the propellers to clear the fuselage.)
Additionally, at least one airliner had control surfaces mounted on the engine pylons, although these were only used as a stall-recovery aid.
On aircraft with horizontal engine pylons, are the pylons usually shaped to produce lift (either up or down)?