Water Rocket Handbook

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  • Topic: Rocket, Parachute, Model rocket
  • Pages : 82 (21208 words )
  • Download(s) : 86
  • Published : October 11, 2010
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Bottle Rocket Handbook
Leo C. Singleton IV

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Copyright c 2001 Leo C. Singleton IV. All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, without the prior written permission of the author.

Acknowledgments
Although I can take credit for being the author of this handbook, much of its content is the hard work of other members, past and present, of the Columbus High School Science Olympiad team. I would like to take this opportunity to thank them and the many others for their contributions to this handbook. Will Evans, the only one among us who actually plans to become an aeronautical engineer, is responsible for many of the building techniques listed in the handbook. He protected his designs for reinforced fins, airspeed flaps, and drogue chutes as if they were children, before I decided to publish them to the world. Thanks Will. Jamal Shaukat, our longest member of the Science Olympiad team. Two years ago, he and I spent many long hours developing the elliptical parachute algorithms and building the first parachutes. And now, despite being a sophomore in college, Jamal still manages to attend more state competitions and rocket launches than anyone else on the team. Linda Owens, our Science Olympiad coach, whom I promised to leave plans and drawings for my rockets before I graduate. Instead I’m leaving her a book. Good enough. And the rest of the Columbus High School Science Olympiad Team, especially those of you who have come out to support us on cold, rainy days, chasing rockets through an overgrown field of weeds and thornbushes. We couldn’t have done it without you. iii

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Contents
Introduction Format 1 3

I

Rocket Theory

5
7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 11 12 12 13 13 15 15 17 18 19 20

1 Ten Common Myths 2 Five Critical Factors 2.1 Reliability . . . . . 2.2 Rigidness . . . . . 2.3 Precision . . . . . . 2.4 Weight . . . . . . . 2.5 Drag . . . . . . . . 3 Forces 3.1 Liftoff . . 3.2 Launch . 3.3 Air Pulse 3.4 Glide . . . 3.5 Descent . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Stability 21 4.1 What is Stability? . . . . . . . . . . . . . . . . . . 21 4.2 Swing Test . . . . . . . . . . . . . . . . . . . . . . 22 v

vi 4.3 4.4 4.5 4.6 Center of Gravity and Center of Pressure Cross-Section Method . . . . . . . . . . . Barrowman Equations . . . . . . . . . . . Stability Tips . . . . . . . . . . . . . . . . 4.6.1 Bottle Shape Affects Stability . . . 4.6.2 Semi-Stable Rockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 25 27 27 27 28 29 30 31 32 33 34 34

5 Simulator Data 5.1 Typical Launch . . . 5.1.1 Height . . . . 5.1.2 Velocity . . . 5.1.3 Acceleration . 5.2 Water Volume . . . . 5.3 Mass . . . . . . . . .

II

Rocket Construction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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41 42 42 42 43 44 45 45 46 47 47 49 49 53 53 53 54

6 Fins 6.1 Single-Ply Fins . . . . . . 6.1.1 Fin Patterns . . . 6.1.2 Constructing . . . 6.1.3 Breaking Point . . 6.2 Reinforced Balsa Fins . . 6.3 Other Materials . . . . . . 6.4 Attaching Fins to Rockets 6.5 Extra Reinforcement . . .

7 Parachutes...
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