In April 2009, Toshio Toyoda, chairman of Japan origami Aircraft Association, set a new world record for the flight time of paper aircraft: 27.9 seconds, 0.3 seconds longer than the original record. In February 2012, the paper plane designed by American paper aircraft Master John Collins flew 69.14 meters, setting a new record for the flying distance of paper aircraft. So, how can we make the paper plane fly high and far?
The flight process of paper aircraft is to be "launched" to a certain altitude, and then glide. The design principle of the aircraft is that it needs a piece of scientific paper, but its performance is very good.
When we origami aircraft, we should first think that it can obtain larger lift and smaller resistance at the same speed. Then, the wing surface should imitate the real aircraft, with a certain radian, just like the arch bridge, the middle is slightly higher, and keep the wing shape, make the front end slightly upward, with an included angle of about 5 ° with the fuselage. The slender wing can reduce the resistance, but limited by the strength of paper, the wing is too slender, which is not conducive to its high-speed projection. Imitating the Boeing 747-400, an upturned winglet is folded at the wingtip to reduce the drag. In addition, in order to obtain appropriate aerodynamic performance, you can use scissors to cut some small notches at the trailing edge of the wing and try to change the angle.
To ensure the stability of the paper plane, we can make the wing have a certain angle of up reflection, that is, keep the existing wing shape, let it take the wing root as the rotating axis and tilt up slightly. If you are looking for space time rather than glide distance, you should try to increase the area of the wing and reduce the weight of the fuselage without affecting the throwing force.
Of course, the technology of throwing paper aircraft is also exquisite. The throwing angle and speed directly affect the flight performance. In order to throw far, it is necessary to ensure the vertical and horizontal throwing speed at the same time; In order to increase the blank time, the throwing direction should be within the range of 10 ° from the vertical direction, that is, throw upward as much as possible.