Methodology for finding the virtual center of mass of the aircraft

Abstract

Abstract There are types of aircraft for which the geometric shapes are primarily due to “hard” infrastructural constraints. The secondary nature of aerodynamic requirements makes it possible to deviate from the traditional design task. And move on to the Inverse Design Problem. A solution that allows you to reduce the number of design iterations and narrow the search for a rational solution in the Pareto-optimal area. These aircraft include vertical takeoff and landing aircraft. After analyzing the characteristics of moment-inertia units obtained after an analytical experiment, it shows that the introduction of a virtual center of mass makes it possible to reduce the radius of action of the inertial forces of the aircraft. A sequence of absolute advantages in terms of the moment of inertia of the nodes has been obtained, for example, a more optimal location of the target load, fuel tanks and power plant, which provides an advantage in the mass of the aircraft up to 7-8%, only due to the rational moment of inertia of the layout relative to the virtual center of mass. In an aircraft, the moment of inertia depends to the fifth power on the change in its linear size