Rockets for Rookies
by Even Steven
Popular terminology makes a distinction between jets and rockets: a jet takes in air from the atmosphere; a rocket needs no air supply, as it carries its own supply of oxygen. Both types of engines operate by expelling a stream of gas at high speed from a nozzle at the after end of the vehicle. Rockets are distinguished by the means used to produce exhaust material. The most common type of rocket engine obtains its high-pressure...
by Even Steven