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Skyrocket
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==Construction== A bottle rocket consists of three major parts including: *The '''[[rocket engine]]''' will typically use a [[black powder]]-type fuel, possibly with additives that produce a decorative spark trail as the rocket ascends, but other chemical reactions have also been used for thrust. The fuel is pressed to form a solid grain inside a cardboard tube, which is sealed at the top but open at the bottom with an air gap. When the fuel is ignited from the bottom, hot gases expand in the air gap and are expelled downward to propel the rocket upward. Other fuels are possible; a common alternative is [[whistle mix]], to produce a whistling rocket. *The '''nose cone''', in addition to serving an aerodynamic role, typically contains the rocket's payload. This may include exploding fireworks, colored [[Pyrotechnic star|star]]s, a parachute, confetti, or other decorative items. *The '''guide stick''', in a bottle rocket lacking fins or other stabilizers, provides stability in flight. The stick's length and weight are sized to achieve this.
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