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automatic radio guiding system which was designed to lead
Natters with inexperienced pilots to the altitudes at which Allied bombers operated. The Natter probably turned on its back and flew horizontally rather than climbing, thus accelerating, which Sieber may have misinterpreted as a steep nose dive, pulling harder on the thrust rudder which made things even worse. Also, the brake parachute did not open due to the booster still being stuck. It is likely that Sieber understood his situation when the Natter left the clouds, and tried to bail out, but due to the high speed he managed only to get out with his left arm and leg before the violent impact.
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As an experienced test pilot had failed to control the Natter, which was intended to be operated by many inexperienced pilots as an interceptor, the SS cancelled the project. The cause was officially explained as a failure of the canopy, which simply may have not been properly latched before launch.
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boosters failed to release, and the Natter went out of control. At 500 m (1,600 ft) the cockpit canopy pulled off as Sieber intended to bail out. He was instructed by radio to keep trying to shake off the booster, but inside the clouds he lost orientation as he presumably did not rely on the
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for the first manned vertical take-off of a rocket. The experienced test pilot was told to execute a half roll if the Natter should veer off course. The start worked as planned, with Sieber executing the roll maneuvers as soon as the Natter changed its course. After the release of the
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At the impact site, about 7 kilometres (4.3 mi) away, a 5-metre (16 ft) deep crater was found, and except for half of a left arm and half of a left leg, only small body parts were foundâ , and later a 14-centimetre (5.5 in) long part of a skull.
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Eyewitnesses reported that the main engine kept firing. Soon, the Natter reappeared vertically from the clouds and hit the ground at high speed. All eyes searched for Sieber appearing with his parachute from the clouds, but to no avail.
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Reconstruction of the flight, which lasted for 55 seconds and covered a horizontal distance of 7 kilometres (4.3 mi), calculated an
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of about 800 kilometres per hour (500 mph), thus about 14 kilometres (8.7 mi) were traveled in total.
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RATO rockets at the impact site, proving that it did not release from the fuselage of the Natter.
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in highly risky sorties. Shortly before his flight, he had become engaged to
Gertrud Naudit, a
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Grave of Lothar Sieber in the cemetery at
Stetten am kalten Markt; Baden-WĂŒrttemberg, Germany
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Trailing scene, Sieber discusses with Erich Bachem the final launch preparations, at the
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came off and fell to the ground while the Natter disappeared into the clouds.
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On 1 March 1945, at the
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Vom HöhenaufklÀrer bis zum
Raumgleiter - Geheimprojekte der DFS 1935â1945
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who was killed in the first vertical take-off manned rocket flight, in a
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387:"Lothar sieber Spitfires over Berlin the Airwar in Europe 1945.PDF"
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Sieber's remains were buried with military honors on 3 March 1945.
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Aviators killed in aviation accidents or incidents in
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Things went well at first, but one of the four jettisonable
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In 1998â1999, excavations found the remains of one of the
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Before he became a test pilot for Bachem, he piloted an
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MilitÀrgeschichtliche
Sammlung Stetten am kalten Markt
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273:The first manned vertical-takeoff rocket flight
234:(7 April 1922 â 1 March 1945) was a German
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408:Der erste bemannte Raketenstart der Welt
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137:Lothar Sieber boarding the M23 prototype
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