Lifting single bodies for vertical landing gear with fixed wings

Abstract

The invention discloses a vertical landing gear with fixed wings. The landing gear comprises two lift single bodies adopting the same structures and arranged in a parallel or coaxial-line manner, wherein each lift single body is characterized in that two attack-angle-adjustable fixed wings are mounted on each lift single body, and the high-speed airflow for generating the lift is from a high-speed rotary centrifugal fan, the wing-span direction of the fixed wings and the axial direction of the centrifugal fan are consistent, and the leading edges of the wings are positioned at the uppermost position and the lowest position of the cross section of the centrifugal fan as well as at strip-shaped exhaust outlets stretching in the tangential direction. The vertical landing gear has the benefits that the high-speed airflow blowing the wings is centralized, so that the average lift on unit area of the wings is improved.

Description

technical field [0001] A vertical take-off and landing device with a fixed wing, characterized by a fixed wing with an adjustable angle of attack, but the high-speed airflow that generates lift comes from a high-speed rotating centrifugal fan. It belongs to the field of aircraft capable of vertical takeoff or landing. Background technique [0002] The research and production of vertical take-off and landing aircraft has achieved amazing results, and it has shown its talents in the military field where cutting-edge technologies gather, but it has not stopped people's exploration of new vertical take-off and landing devices. [0003] Relevant documents have pointed out that: the quality factor of the existing rotary-wing helicopter rotor is low, and the energy loss is relatively large. In fact, since multiple rotors are radially connected to the main shaft, the speed of each point in the span direction of each rotor is linearly distributed starting from zero, and the airfoil ...

AI Technical Summary

Problems solved by technology

[0007] The disadvantages of the above structure are: the narrow and long semi-wind tunnel structure without a roof and the circular outlet of the axial flow fan will inevitably lead to a limited area swept by the high-speed airflow discharged, while the fixed wingspan is wide and extended, which leads to The high-speed airflow blowing over the fixed wing is not concentrated enough, and the blowing stroke is long. The wings arranged at the rear are in the airflow disturbed by the front, and the lift will drop sharply; thus, the average lift per unit area of ​​the wing will still not be very high.

Images