The present book, which is somewhat technical in nature, can be called a part of the set of my 'Make and Fly books on aeroplanes. The first book of this series, Le. Make and Fly -Warplanes, was published in 1993. It was welcomed so happily by all sections of the society, that my publishers have had to run four Marathi and five English reprints in the past few years. This fact confirms the need for such books. I received several letters from students, teachers and parents, expressing their views on that book. Most of them had sought the guidance to solve some of their problems in flying their models. A key-point to note is, not a single one of these letters even hinted any tone of complaining about difficultness, even though they were referring to their difficulties! On the contrary, most of them demanded more details, more science and more emphasis on the dynamics of the aeroplane models.
It has always been a pleasure for me to fulfill such demands. In a way, Science itself is believed to be a difficult subject. Aerodynamics is further more difficult. In spite of that, so many people were anxious to know more about it! This was positively pleasing! And just to meet this requirement, present book intends to clarify the basics of Aerodynamics without going into intricate mathematical details. Eliminating mathematics altogether is not possible in such books. Therefore, a few very simple mathematical equations will be found in the book. They are there particularly to illustrate how mathematics can support scientific subjects, and care has been taken to keep the maths within the reach of Standard V or VI students.
Many students had asked for 'measurement of the aeroplanes' in their letters, so that they could design their own aircraft. A few tips and equations have been incorporated here to cater to such an enthusiasm. It is expected that they should use these for reference only, because the exact values depend greatly on the type of paper used, grammage of the paper, stiffness of the paper, type of adhesive used etc. One can design a proper paper model with experimentation and experience only. I am sure, the enthusiastic students will make good use of these tips and will work steadfastly till they succeed in developing their own models!
Side by side, a casual reader interested in knowing a little more about the science of Aerodynamics will also benefit from this book. Several questions like How and why does the aircraft fly? What is 'balancing' of the aircraft? How to guess about the flight characteristics just by looking at the shape of the aircraft? What is the correct way of launching an aircraft? How to judge the winds in the open ground prior to launch? -are dealt with in this book. Thus, this book will be useful as a supplementary book for any and all the books of 'Make and Fly' series. And of course, for anyone who wants to acquire some of the basics of Aerodynamics.
I am confident that the book will enhance the aeromodelling and flying skills of all those who would study the book carefully.
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