Well...I (with packers generous help) made a helicopter. Many disliked it (and sort to flame me) cos it used the magic carpet script.
Its in add-ons section but I think link is broken. I'm not reuploading it.
As for planes...i'm really not a fan of the control scheme. Its yaw controls (a + d) are much to sensitive and its too easy to go spinning out of control, yet the up and down (mouse up+down) are not responive enough.