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Centuri 33 User Manual

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Centuri 33 Specifications

General IconGeneral
BrandCenturi
Model33
CategoryToy
LanguageEnglish

Summary

PROLOGUE

INTRODUCTION

CENTER OF GRAVITY

CENTER OF PRESSURE

STABILITY CRITERIA

3. Elements of the Theoretical Center of Pressure Calculations

ASSUMPTIONS

Lists the foundational assumptions for the calculation method.

NORMAL FORCE TERMINOLOGY

Defines terms and concepts related to aerodynamic forces on rockets.

ANALYSIS BY REGIONS

Explains the method of dividing the rocket into sections for analysis.

CENTER OF PRESSURE LOCATIONS

Discusses the importance of a common reference point for C.P. measurements.

REGION LOCATIONS

Defines symbols and methods for measuring C.P. from different rocket sections.

SUBSCRIPT NOTATION

Explains the meaning of subscripts used in aerodynamic force notation.

REFERENCES

Lists sources used for theoretical derivation of equations.

4. Equations for Finding the Center of Pressure of the Rocket

NOSE

Provides equations for calculating normal force and C.P. for different nose shapes.

SPECIAL SHAPE NOSES

Discusses C.P. calculations for less common nose cone shapes.

CONICAL SHOULDER

Provides equations for normal force and C.P. of conical shoulder sections.

CYLINDRICAL BODY

Explains that forces on cylindrical bodies are often negligible.

CONICAL BOATTAIL

Provides equations for normal force and C.P. of conical boattail sections.

FINS

Details how to simplify fin shapes and calculate forces.

OTHER IDEALIZED FIN SHAPES

Illustrates various fin shapes and their idealizations for analysis.

FIN INTERFERENCE FACTOR

Explains how air flow interaction affects fin forces.

5. Simplified Charts of the Center of Pressure Equations

COMBINATION CALCULATIONS

Shows how to combine results from different rocket sections.

6. Procedure for Using the Charts

NOSE

Step-by-step instructions for calculating nose C.P. using equations.

CONICAL SHOULDER

Step-by-step instructions for calculating conical shoulder C.P. using charts.

CONICAL BOATTAIL

Step-by-step instructions for calculating conical boattail C.P. using charts.

FINS

Step-by-step instructions for calculating fin C.P. using charts.

COMBINATION CALCULATIONS

Step-by-step instructions for combining section results for total C.P.

7. Designing Stable Model Rockets

1. Preliminary Work

Outlines initial steps and considerations for designing a stable rocket.

2. Calculations

Details the process of applying equations to determine rocket stability.

MULTISTAGE MODELS

Explains stability considerations for rockets with multiple stages.

8. Examples

JAVELIN ANALYSIS

Demonstrates calculations for the Javelin model using equations and charts.

RECRUITER ANALYSIS

Analyzes the Recruiter model using equations, charts, and stability checks.

ARCON-HI ANALYSIS

Examines the two-stage Arcon-HI model using equations and charts.

9. APPENDIX A - Estimating the Center of Gravity of Model Rocket Design

BALANCE TEST TECHNIQUE

Describes a practical method for determining C.G. by balancing.

CALCULATION TECHNIQUE

Details how to calculate C.G. based on component weights and positions.

10. APPENDIX B - Theory of Moments

11. APPENDIX C - Resolution of Forces

12. APPENDIX D - Why CNα Can Be Used to Represent the Total Normal Force (N)