Tailless Aircraft In Theory And Practice Pdf -

A conventional wing produces a nose-down pitching moment. A conventional tail produces a balancing nose-up force. In a tailless aircraft, the wing must produce its own balancing force. This is achieved with a —an airfoil whose trailing edge curves upward slightly. This upward curve produces a nose-up pitching moment that can trim the aircraft. However, reflexed airfoils are less efficient than conventional ones, reducing overall lift-to-drag ratio.

Key formula from theory: The aerodynamic center must be aft of the center of gravity (CG). For a tailless aircraft, the CG range is extremely narrow—often less than 5% of the mean aerodynamic chord (MAC), compared to 15-20% for conventional designs. tailless aircraft in theory and practice pdf

Engineers utilize two primary methods to trim a tailless aircraft without sacrificing lift: 1. Reflexed Airfoils A conventional wing produces a nose-down pitching moment