The Slovenian rocket engineer Herman Potocnik (1892-1929) envisaged
correctly all the phases of the flight around the planet Earth already
in the first half of the previous century in his book Das problem der
Befahrung des Weltraums (The Problem of Space Travel), published in
1929 in Berlin. In 1963 the well-known German-American rocket
scientist Wernher von Braun confirmed Potocnik's original invention.
Potocnik, Herman (1892-1929)
"A spaceship for shuttling between the Earth and its orbit. It
takes off as a rocket, orbits the planet as an artificial satellite,
reenters the atmosphere and lands as a winged, propeller-less
aircraft".
The Slovenian engineer of rocket technology, Herman Potocnik
calculated and also published in his book Das problem der Befahrung
des Weltraums (The Problem of Space Travel, Berlin 1929) under the
pseudonym Hermann Noordung, that a geostationary satellite or "an
observing station in open space" at an altitude of 35,900 kilometres
(42,300 km from the centre of Earth) must travel with the speed of
3,080 metres per second in the direction of the rotation of our
planet, if its position is to remain stationary over a given point on
Earth. Today we know that his calculations were off by a mere 0,56 per
cent! His written work was a text book for an entire generation of
space technology pioneers.
In 1963 the rocket scientist Wernher von Braun stated before the
launching of the American telecommunication satellite Syncom" that the
distance and the approximate point in space was determined with
amazing precision as early as 1929 by a captain in the Austrian army,
engineer Herman Potocnik. His book "The Problem of Space Travel" marks
a turning point in space and rocket technology" (Von Braun: World
Astronautics Encyclopedia, Larousse 1966). Potocnik's small book has
188 pages and one hundred authentic illustrations.
He imagined his only book - according to Wernher von Braun, a
genuine text book for himself and the generation of space experts who
were the first to bring man to the Moon - to be an engineering proof
of the technical realization of movement in space.
More information:
http://www.hq.nasa.gov/office/pao/History/on-line.html
http://sulu.lerc.nasa.gov/dglover/chrono.html
http://www.hq.nasa.gov/office/pao/History/SP-4026/contents.html
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