Analysis of information sources in references of the Wikipedia article "سطح الذيل" in Arabic language version.
It is a misconception that tailed aeroplanes always carry tailplane downloads. They usually do, with flaps down and at forward c.g. positions, but with flaps up at the c.g. aft, tail loads at high lift are frequently positive (up), although the tail's maximum lifting capability is rarely approached..p.19p.20p.21
