In addition, the arms also allow for the full range of rotor thrust
, which increases energy efficiency.
He said the design also makes drones more energy efficient because the movable-arm technology allows for the use of the full range of rotor thrust
(1) Convert the control force-torsion to individual rotor thrust
In the case of multirotor vehicles, rotor thrust
provides the loads to compensate for the vehicle weight and aerodynamic drag.
The rotor thrust
in  and  are 9.54 kg and 9.69 kg, respectively.
A lower rotor thrust
force may lead to helicopter crash.
However, the front fuselage restricted tilt-angle, and the concept failed to address the basic necessity to keep the rotor thrust
acting through the centre of gravity, regardless of tilt angle.
Given [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII], which denote the rolling torque, the pitching torque, and the total yawing torque, are induced by the rotor thrust
and rotor drag acting on the airframe.
Two angular contact bearings are mounted in tandem on the compressor end of the cylinder in an arrangement that carries rotor thrust
in both axial directions.
T can be calculated as a product of the propeller surface S and the pressure difference in front of the propeller and behind the propeller