an unpowered aircraft

Abstract

The invention provides an unpowered aircraft, which can be used as a toy, model airplane or teaching aid, comprising a plane, curved or three-dimensional body made of at least one layer of thin shell material with a thickness of 0.05mm-2mm, the thin shell material Including polymer materials, silk, feathers and composite materials of at least two of polymer materials, silk, and feathers. This technical solution has important performance and characteristics. The overall weight of the aircraft can be less than or equal to 4g, the mass per unit projected area is less than or equal to 0.025g / cm2, and the flight speed can be less than 2m / s. The unpowered aircraft provided by this technical solution is comparable to the existing Compared with model airplanes, paper airplanes are lighter in weight, slower in flight speed, stable in flight state, and easy to maneuver; moreover, they are more beautiful overall and less prone to deformation.

Description

technical field [0001] The invention relates to the field of model airplanes, in particular to an unpowered airplane. Background technique [0002] Existing paper airplanes are limited by materials and manufacturing techniques, so it is impossible to optimize the design of the fuselage based on the knowledge of aerodynamics. They have no streamlined shape, low lift coefficient, and small lift; moreover, such paper airplanes are heavy and The flying speed in the air is fast and the gliding performance is poor; if the weight of the aircraft is reduced, thinner paper will have to be used. If it is too thin, the overall rigidity of the paper aircraft is not enough, it is easy to deform, and it is difficult to maintain its aerodynamic shape. Smooth flight leads to unstable flight status of the aircraft; paper airplanes that are too heavy or not rigid enough cannot be controlled accordingly during flight, and paper airplanes are easy to slip. [0003] The flying speed of existing...

AI Technical Summary

Problems solved by technology

[0002] Existing paper airplanes are limited by materials and manufacturing techniques, so it is impossible to optimize the design of the fuselage based on the knowledge of aerodynamics. They have no streamlined shape, low lift coefficient, and small lift; moreover, such paper airplanes are heavy and The flying speed in the air is fast and the gliding performance is poor; if the weight of the aircraft is reduced, thinner paper will have to be used. If it is too thin, the overall rigidity of the paper aircraft is not enough, it is easy to deform, and it is difficult to maintain its aerodynamic shape. Steady flight leads to instability of the overall flight state of the aircraft; paper airplanes that are too heavy or not rigid enough cannot be controlled accordingly during flight, and paper airplanes are easy to slip

[0003] The flying speed of existing fixed-wing model aircraft is usually above 10m / s, and it is difficult to generate sufficient lift at an ultra-low speed of less than 5m / s; if the lift is supplemented by increasing the wing area, the weight will increase sharply. It is still difficult to generate enough lift due to the overweight of the aircraft; fixed-wing aircraft is not easy to control and is usually operated by a professional operator; it cannot be effectively flown and controlled indoors or in a small space, and may even cause damage to the aircraft; due to the high speed of the aircraft model, it is difficult to Close observation and control, poor direct intervention ability

[0004] In terms of existing teaching aids, there are no similar or similar aerodynamically designed aircraft products and physical models

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