How to fold an airplane to fly far and high

How to fold a paper airplane to fly farther?

Folding paper airplanes here is a premise - fly farther!

The biggest difference between paper airplanes and real airplanes is that the power source of flight is different, basically, the power of propeller airplanes comes from the front of the propeller to generate power to "pull"; the power of jet airplanes comes from the back of the turbofan engine to "push"; Paper airplanes, on the other hand, rely on the kinetic energy generated by throwing them. This requires the design of paper airplanes and real airplanes are a little different, mainly for a few points:

One, the center of gravity and the position of the wing arrangement, that is, the shape,

From left to right is the No. 1 to No. 6 paper airplanes, these are our usual folding of airplanes, the figure of the black downward arrow at the center of gravity, the blue circle for the aerodynamic surface. 1 and 2 are the most common, the center of gravity more concentrated in the geometric center, with the aerodynamic surface is close to the center of the geometry, the aerodynamic surface. Geometric center, and the aerodynamic surface is about to overlap, such an arrangement, resulting in the aircraft do not fly far, easy to turn around and fall, No. 3 to No. 6 center of gravity in front, the aerodynamic surface back, so it is easier to fly far. For example: the right for an arrow, its flight is dependent on the kinetic energy generated by the bow, with a paper airplane thrown out of the same reason, an excellent arrow, the center of its front one-third of the place, and maintain the stability of the aerodynamic surface at the end, as long as the bow is enough pounds, you can fly farther, usually the traditional angle bow 30 pounds of tension, enough to support the arrow to fly more than 140 meters, imagine if the arrow is manufactured into a like this, I really don't know if they would fly around!

A weight problem:

People usually think of paper airplanes as being lighter and lighter, which takes into account the lag time, but if you only think of flying farther, you can't say the same thing, note! Paper airplanes rely on "throw", think about it: give you a feather, even if you use all your strength to throw out, the result is not fly out half a meter, give you a stone, it's not the same, so that's good to understand it, that requires the material can not be too thin, if necessary, the front end of the weight;

Second, the appropriate lifting of the rudder surface

Paper airplane flight, kinetic energy drop, paper airplanes will fall quickly, in order to delay this fall, appropriate to create a little bit of head up rudder, the uplift angle can not be too large, the head up rudder to the head up the direction of the change in the whole process of flight is different, at the beginning of the throw, kinetic energy, rudder head up the role of the big, the end of the flight, the kinetic energy drop, the head up the role of the diminishing, so we need to try many times! If there is a sudden rise of the nose, followed by a serious loss of kinetic energy, and finally falling, it means that the angle of the head-up rudder is too large, in addition to adjusting the angle of the rudder down, you can also add a little counterweight on the front end.

Three, stability:

Is it enough to do the above work? Of course not, the third is the most important - stable, fly straight! : The direction of the paper airplane to maintain not only since the horizontal direction of the rudder, but also depends on the vertical direction of the rudder, Figure-4 two arrows in the lower right corner, the left one is a real arrow, the right one will only appear in our domestic film and television drama, the real arrow has three feathers, will be more stable! Illustrated by this example: obviously No. 1 paper airplane is the worst, No. 2 is a little better, No. 3 although the vertical rudder is not big, but do not forget, its three rudders, more importantly, the wing ends of the rudder from the center of gravity of the center axis of the aircraft is farther away, so what does it mean? The principle of leverage tells us that those two distal vertical rudder surfaces will be more useful!

Four, fault tolerance:

This is the most difficult one! Paper airplane is, after all, paper production, no matter how fine production, can not avoid the aerodynamic surface of the smallest distortion, do not look at this little deformation, the impact on the flight is extremely large, sometimes feel good, is to fly the curve, but also can not find the reason, how to do it? Disregarding the stalling time, we can reduce the size of the rudder surface appropriately, so that the distortion will be smaller, and the impact on the flight attitude will be smaller, coupled with the fine production, it will fly straight.

Summary: 1, if the pursuit of distance, paper aircraft, no matter how to design, follow the center of gravity control in about one-third of the front, the rudder back; 2, the appropriate increase in weight, or counterweight, in order to be able to "throw" out; 3, in the design and production of paper airplanes, don't ignore the role of vertical rudder; 4, the horizontal and vertical direction of the rudder folded, and the vertical direction of the rudder. With the vertical direction of the rudder folded carefully can not be twisted, you can properly reduce the size of the rudder (paper airplane wings can not be called a real wing, which does not have a real aircraft wing cross-section "on the convex down" fluid lift design, so the full text is called the rudder). Finally, I would like to say, paper airplanes are the most important toys of every child's childhood, or a dream of the Air Force, which not only has the principle of logic, but also need to use their brains and patience, the child's life is not only learning, there are also fun, a "yin" and a "yang" can be long-lasting, for the adults as well, not only work and study, but also work and study, so the whole text is called the rudder. The same is true for adults, who not only work and study, but also play out the tricks!