Helmut Hölzer (English: Hoelzer)
Helmut Hölzer in Huntsville, Alabama
|Died||October 12, 1996 (aged 84)|
Huntsville, Alabama, United States
|Known for||Designing an electronic simulator for the V-2 rocket control system.|
|Fields||Electrical Engineering, Applied mathematics|
Marshall Space Flight Center (Director, Computation Division)
In October 1939, while working for the Telefunken electronics firm in Berlin, Hoelzer met with Ernst Steinhoff, Hermann Steuding, and Wernher von Braun regarding guide beams for a flying body.[Neufeld 1] In late 1940 at Peenemünde, Hoelzer was head of the guide beam division[Neufeld 2] (assistant Henry Otto Hirschler), which developed a guide-plane system which alternates a transmitted signal from two antennas a short distance apart, as well as a vacuum tube mixing device (German: Mischgerät) which corrected for momentum that would perturb an object that had been moved back on-track.[Neufeld 3] By the fall of 1941, Hoelzer's "mixing device" was used to provide V-2 rocket rate measurement instead of rate gyros.[Neufeld 4]
Then at the beginning of 1942, Hoelzer built an analog computer to calculate and simulate V-2 rocket trajectories[Neufeld 5] Hoelzer's team also developed the Messina telemetry system. After evacuating Peenemünde for the Alpenfestung (Alpine Fortress), Hoelzer returned to Peenemünde via motorcycle to look for portions of his PhD dissertation prior to surrendering to United States forces at the end of World War II.
One of his grandchildren is Olympic swimmer Margaret Hoelzer.
- Tomayko, James E. "Computers Take Flight: A History of NASA's Pioneering Digital Fly-by-Wire Project" (PDF). p. 13. Archived from the original (PDF) on 2004-07-19. Retrieved October 18, 2008.
- Tomayko, James E. (July 1985). "Helmut Hoelzer's Fully Electronic Analog Computer". Annals of the History of Computing. 7 (3): 227–240. doi:10.1109/mahc.1985.10025.
- Wade, Mark. "Hoelzer". Astronautix. Retrieved October 19, 2008.
- June 6, 1960
- Ordway, Frederick I, III; Sharpe, Mitchell R (1979). The Rocket Team. Apogee Books Space Series 36. New York: Thomas Y. Crowell. pp. 46, 294. ISBN 1-894959-00-0.
- Ernst Steinhoff
- H. Otto Hirschler, 87, Aided Space Program
- Ley, Willy (1951) . Rockets, Missiles and Space Travel (Revised edition 1958). New York: The Viking Press. p. 257.
- Neufeld, Michael J. (2013-09-10). The Rocket and the Reich: Peenemunde and the Coming of the Ballistic Missile Era. Smithsonian Institution. p. 138. ISBN 9781588344663.
- Ulmann, Bernd (2013-07-22). Analog Computing. Walter de Gruyter. p. 38. ISBN 9783486755183.
- Tomayko, James E. (1985). "Helmut Hoelzer's Fully Electronic Analog Computer". IEEE Annals of the History of Computing. 7 (3): 227–240. doi:10.1109/MAHC.1985.10025.
- Neufeld, Michael J (1995). The Rocket and the Reich: Peenemünde and the Coming of the Ballistic Missile Era. New York: The Free Press. pp. 104, 106, 107, 140.
- p. 107
- p. 140
- p. 104
- p. 106
- p. 106