Friday, July 5, 2013

spaceplane


A spaceplane is a vehicle that operates as an aircraft in Earth's atmosphere, as well as a spacecraft when it is in space. It combines features of an aircraft and a spacecraft, which can be thought of as an aircraft that can endure and maneuver in the vacuum of space or likewise a spacecraft that can fly like an airplane. Typically, it takes the form of a spacecraft equipped with wings, although lifting bodies have been designed and tested. The propulsion to reach space may be purely rocket based or may use the assistance of air-breathing engines.

To date, only pure rocket spaceplanes have succeeded in reaching space, although several have been carried up to an altitude of several tens of thousands of feet by a purely atmospheric aircraft mothership before release. While all spaceplanes have used atmospheric lift for the reentry and landing phase, none to date have succeeded in a design that relies on aerodynamic lift for the ascent phase in reaching space (excluding mothership first stage).

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talk nineteen to the dozen

  to speak rapidly and without stopping