History After Tsiolkovsky came an American, Robert Goddard (1920’s). First to experiment with liquid fuel… more difficult. Developed a gyroscope system.

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Presentation transcript:

History After Tsiolkovsky came an American, Robert Goddard (1920’s). First to experiment with liquid fuel… more difficult. Developed a gyroscope system (balance) and a payload compartment for instruments.

German V-2 Werner Von Braun and Hermann Oberth developed V-2. It could lift off in Germany and hit London during end of war. After war German scientists went to America or Russia.

Chemical Fuel A chemical reaction creates hot gas at high pressure. This pressure is expelled out the back of the rocket. Types:1. Solid 2. Liquid

Post-War Both Russia and U.S. developed ICBM’s (intercontinental ballistic missiles). These missiles would eventually launch astronauts into space. In 1957 Russia launches Sputnik, an artificial satellite.

After Sputnik NASA formed in 1958… a civilian agency with a goal of peaceful exploration of space. In 1969, U.S. astronauts land on the moon using Saturn V rocket. All objects put into space require rocket engines to reach escape velocity.

Satellites Object put into space by humans Sputnik was first in We had tried but failed previously. Purposes: for communications, navigation, weather, and research, to name a few Geostationary (geosynchronous orbit) = satellite stays in same spot over Earth

How Many? There are over 13,000 satellites in orbit. Of these, ~3,500 are functioning and 10,000 are debris. So, 75% of satellites in orbit are junk!

Model Rockets Use black powder propellant. There is a delay element that lets the rocket coast upwards. Then, an ejection charge triggers the parachute.

Model Rocket

Model Rocket Engine 1.Nozzle 2.Case 3.Propellant 4.Delay Charge 5.Ejection Charge 6.End Cap

Model Rocket Motors