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Principles of Rocketry

Principles of Rocketry. Isaac Newton's 3 rd law of Motion. For every action there is an equal and opposite reaction Action/Reaction Pairs!. What is the Action?. Solid Fuel Rockets. Fuel in solid form burns and is converted to hot gasses. Hot gasses expand and create high pressure.

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Principles of Rocketry

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  1. Principles of Rocketry

  2. Isaac Newton's 3rd law of Motion • For every action there is an equal and opposite reaction • Action/Reaction Pairs!

  3. What is the Action? Solid Fuel Rockets • Fuel in solid form burns and is converted to hot gasses • Hot gasses expand and create high pressure • Pressure escapes out nozzle, pushing against air and rocket body equally - Reaction: Rocket moves forward, as gasses move backwards

  4. Gasses Rocket Action Reaction Equal pressure in all directions Pascal’s Principle Hot gasses escaping Nozzle Burning fuel Producing hot gasses Solid Fuel

  5. Our Water Rockets • Instead of hot gasses creating pressure, we use a bike pump and store pressure Action:Expelling water from engine bottle. (water is forced down) Reaction:Rocket is forced in the opposite direction (rocket forced up)

  6. Water Rockets Work Like Real Rockets Pascal’s Principle Reaction: Bottle forced up by water being expelled down High Air pressure is transmitted equally in all directions and parts of the fluid. Action: Water forced out and down by air pressure

  7. Other factors that make the Water Bottle Rocket Fly Compressed Air + Water

  8. Mother Nature doesn't like it when things aren't equal! When you pull the pin on the launch pad, and the latch holding your rocket to the launch pad pulls back, no force will be holding that rocket down! The unbalanced force of the High air pressure inside of your rocket will instantly rush out of the rocket nozzle pushing your rocket into the sky!

  9. How Newton's Laws Affect Our Rockets • Newton'sFirst Law When you pressurize your rocket and compress all of that air into your rocket engine, the force of the launch pad latch equals the force of the compressed air. Your rocket is resting, it will go now where.

  10. Newton'sSecond Law This law tells you how much force (push) is going to come out of your rocket nozzle. The air is the accelerant, the water is the mass. You are limited to a 2000 ml volume rocket engine (a 2 liter pop bottle).The ratio of compressed air and water will produce the force.

  11. Newton'sThird Law • When you pull the pin, that area of High Air Pressure in the top of your rocket engine is going to force, throw, hurl, spew that "massive" water out the bottom of your rocket at a great speed. That water and air is pushing down, so your rocket must go up.

  12. Stability During Flight The orientation of fins and distribution of mass help make the rocket stable. Center of Gravity Center of Pressure

  13. Center of Gravity

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