sentences:  It was first flown in September 1910.The Roe IV Triplane resembled Roe's Type III, being a tractor configuration triplane with the lower wing of smaller span than the upper two and a triangular section wire-braced fuselage, which was uncovered behind the pilot's seat.The middle wing was mounted directly above the upper longerons, and there was a gap between the single lower longeron and the lower wing.