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Three fins are best when designing a high performance, low drag rocket. This allows interference drag (drag caused by interference of the airflow over the body and fins at the junction) to be reduced by 25 percent.

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Nose cone and rocket diameter affect drag. The amount of air resistance that opposes a rocket's motion depends mainly on the shape of the nose cone, the diameter of the rocket and the speed of the rocket. The first point that meets the air is the nose cone at the front end of the rocket.

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To provide stability during flight, that is, to allow the rocket to maintain its orientation and intended flight path.

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An unbalanced force must be exerted for a rocket to lift off from a launch pad or for a craft in space to change speed or direction (first law). The amount of thrust (force) produced by a rocket engine will be determined by the mass of rocket fuel that is burned and how fast the gas escapes the rocket (second law). The reaction, or motion, of the rocket is equal to and in the opposite direction of the action, or thrust, from the engine (third law).

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Tells us that the more mass an object has, the more force is needed to move it.

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Describes how an object acts when no force is acting upon it. So, rockets stay still until a force is applied to move them. Likewise, once they're in motion, they won't stop until a force is applied.

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States that "every action has an equal and opposite reaction". In a rocket, burning fuel creates a push on the front of the rocket pushing it forward. This creates an equal and opposite push on the exhaust gas backwards

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Reduce air friction, move faster

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Cover the body of rocket with heat insulator

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Cover the body of rocket with heat insulator

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Friction between air and body will increase heat. The insulator will reduce heat conductivity

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Reflect light efficiently so the temperature of the rocket will not rise

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To enable the combustion of fuel in space

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Each stage has burning fuel, pump and combustion chamber. It will slip off when fuel of each chamber completely burn. When the mass decreases, the acceleration increase

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Frame of rocket is made of low density metal 

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Frame of rocket is made of low density metal 

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Lighter, can increase acceleration

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Choose metal with high strength and hardness

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Choose metal with high strength and hardness

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Even under pressure the shape will not change easily