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The Awesome Paper Airplane Book for Kids by Stefania Luca is aimed at children aged 6-9. It contains instructions for 15 paper airplane designs of varying difficulty, and comes with paper to make them with. The planes are grouped as either Dart Planes, Glider Planes, or Stunt Planes, according to how they behave when you throw them. Stability means the plane, if disturbed, will return to its original state. For pitch stability it means the plane will seek a single airspeed. A plane which is unstable in pitch will either pitch up into a stall, or nose dive, but won't settle out anywhere in between. A stable airplane will tend to oscillate up and down a few times, but converge on a steady flight speed. Many typical paper airplane designs are stable, but just barely. As a plane becomes more and more stable, it wants to fly faster and faster. To counter this tendency, up elevator must be used to produce a good trim airspeed. This is why many of the classic paper airplane designs are nearly neutrally stable. Few people realize good pitch stability requires a heavy nose and some up elevator. The classic designs rely on the small inherent "up elevator" effect (positive zero lift pitching moment) resulting from the swept wing, and possibly the airfoil shape. Thus many classic paper airplanes can be flown with no elevator adjustment. Sometimes they fly well, many times they don't, and they always have poor stability. Most full size planes have wings, a tail, and a fuselage (body) that holds the pilot and passengers. Most paper airplanes have just a wing and fold of paper on the bottom that you hold when you throw the plane. There are several reasons for the differences. The finished Harrier shown below. It has cool pointed wings and has great stability because of the triangle on the bottom.
Similar content to 1st book, concerning why paper airplanes fly, more hands-on experiments to demonstrate principles. Also a teachers guide for this book is available from the publisher with more paper airplane information] If you are ready for more advanced paper airplanes, you can try this origami airplane or this origami F16. Get Involved There are few technical references for paper airplanes. Naturally paper airplane books talk about paper airplane aerodynamics, but usually in a simplistic manner. There are many reference to low speed flight which are applicable to paper airplanes. Here are a few. Instructions for folding “Suzanne,” the plane that shattered the previous world record by flying an unprecedented 226 feet, 10 inches, and garnered more than three million views on YouTube
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This wasn't going to be easy. If successful, it would be my forth time at setting the record. Each time was the absolute I could achieve, with improvements resulting from improving my planes and from working on a faster throw. My best unofficial time, 20.88 seconds, was the product of months of working out and well over 100 airplanes constructed. And I have another enemy sneaking up on me as well - time. I am 35 years old, and soon I know my arm speed is likely to decrease.
I currently live with my wife and two dogs in Fort Walton Beach, FL where I work as an aeronautical engineer for the Air Force doing research on all sorts of air vehicles. Previously I worked for Boeing and McDonnell Douglas in St. Louis on jet fighters and other military vehicles. Paper is a lousy building material. There is a reason why real airplanes are not made of paper. Although high aspect ratio wings reduce drag, they also require better building materials. The low strength of paper does not allow the use of high aspect ratio wings. Its important to realize the basics of why paper airplanes fly, and why full size airplanes fly, are identical. They create lift and drag, and are stable or unstable for the same reasons. However paper airplanes look different than most airplanes. The reason they generally look different is for very practical reasons, but not necessarily due to aerodynamics. There are also some definite aerodynamic differences between paper airplanes and full size planes. These difference are not so apparent, but do affect how paper airplanes fly. This paper airplane is a warm-up of sorts. It’s simple, requires few folds, and flies well. It’s just not going to win you any contests or style points. If it’s your kid’s first time making a real paper airplane, this is a good place to start. Fold the top corners in so they meet at the middle. There should be a small triangle tail hanging out beneath these folds.A number was devised which gives the relative importance of viscosity in fluid flow. It is called the Reynolds Number, and it is the ratio of momentum forces to viscous forces in a fluid. The bigger the number, the less influential the viscosity. The viscosity is essentially a constant for a fluid (it changes a bit with temperature), but momentum is proportional to the speed of a fluid over a surface times the distance it has traveled over the surface. For air it is roughly: If you ask many people what origami is, they will have a mental picture of birds and animals like the traditional crane, intricate patterned tessellations, or insanely complex creations by Robert Lang or Satoshi Kamiya. It’s usually followed by a comment like ‘I don’t have the patience for that’, or ‘that’s far too complicated for me’. Quite often, those same people have actually already done some origami when they were children – they just didn’t realise it.
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