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Monthly Archives: December, 2015

Another way to keep from writing — Match Stick Rocket

 

Match Stick Rocket

SUBJECT: Rocketry

TOPIC: Propulsion

DESCRIPTION: A small solid propellant rocket is made from a match and a piece of aluminum foil.

CONTRIBUTED BY: Steve Culivan, KSC

EDITED BY: Roger Storm, NASA Glenn Research Center

MATERIALS:

  • 2 match book matches or wooden stick matches
  • Small square of aluminum foil
  • Paper clip
  • Safety pin

PROCEDURE:

  1. Take one match and wrap a small piece of aluminum foil around the match-head. Wrap the foil tightly.
  2. Make a small opening in the foil wrapped around the match head by inserting the point of a safety pin and bending upward slightly.
  3. Bend the paper clip to form a launch pad as shown in the diagrams. Erect the match stick rocket on the pad. Make sure the pad is set up on a surface that will not be damaged by the rocket’s exhaust such as a lab table. Several layers of foil on the lab table work well.
  4. Ignite the match by holding a second lighted match under the foil until its combustion temperature is reached.

Caution: Be sure the match rocket is pointed away from people or burnable materials. it is recommended to have water or some other fire extinguishant available. The foil head of the rocket will be very hot!

DISCUSSION: The match stick rocket demonstrates Isaac Newton’s Laws of Motion as they relate to rocketry. Newton’s third law states that for every action, there is an opposite and

English: Low-res simulation of c-slot propella...

equal reaction. The exhaust of the fire products from the burning match (smoke and gas) is the “action” and the movement of the rocket in the other direction is the ‘reaction.’ The action thrust is produced when the match burns in an enclosed environment. The aluminum foil acts as a rocket combustion chamber. Because the opening in the foil is small, pressure builds up in the chamber that eventually escapes as a rapid stream of smoke and gas.

English: Schematic diagram of a V-2 rocket des...

English: Force diagram for rocket engine thrust.

In an interesting variation of the experiment, try making holes of different diameters to let the combustion products out at different rates. A larger opening permits the smoke and gas to escape before it has time to build up much pressure. The escape of the products will be slower than produced by a match stick rocket with a smaller opening. Isaac Newton’s second law states that the force or thrust of a rocket is equal to the mass of the smoke and gas escaping the rocket times how fast it escapes. In this experiment, the mass of the smoke and gas is the same for both cases. The difference is in how fast it escapes. Compare the distance traveled with the two match stick rockets.

via Match Stick Rocket.

English: Isaac Newton: Principia Mathematica E...

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Researchers confirm the best way to alienate everyone you text

Source: Researchers confirm the best way to alienate everyone you text

Walking With Intention Day 15 by Gunamayi

Inhale

The child walks or skips, happily and with joy. With no particular intention, reveling in his own spring of inner joy. Where is this child going? Who will he become? When ignorantly he wanders away from that inner peace and joy and forgets the way he came, how will he try to return? How many paths will he try before he breaths a sigh of relief in returning home?

Source: Walking With Intention Day 15 by Gunamayi

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