Wilhelm Kress

Wilhelm Kress (29 July 1836 in Saint Petersburg – 24 February 1913 in Vienna) was an aviation pioneer and an early aircraft designer.

Wilhelm Kress
The Wilhelm Kress monument near the Wienerwaldsee

Life

Kress came to Vienna in 1873, where he developed the first modern delta-flying hang glider in 1877. This hang-glider was a major achievement for the time, when many engineers still struggled with the development of "heavier-than-air" non-powered aircraft. He also displayed rubber band powered flying models called the 'Aeroveloce' in 1877 and 1880.

During the turn of the century he was one of the world-wide contestants for the creation of a break-through powered airplane. In 1900 he developed the control stick for aircraft, but did not apply for a patent (instead, a patent was awarded to the French aviator, Robert Esnault-Pelterie who applied for it in 1907). Kress' aircraft, the Drachenflieger, was constructed for water takeoff and achieved some brief hops in 1901 at the Wienerwaldsee near Vienna.

A longer controlled flight was not possible because the engine (made by Daimler) was twice as heavy as Kress had specified in his order, and could be operated only at half of its nominal power output. During one of his attempts at flight taking off from water, his plane was destroyed when it became entangled on debris floating in the lake.[1]

gollark: Because they can be focused onto small areas.
gollark: Actually, you should probably just read this, apparently Sam's Laser FAQ is pretty good: https://www.repairfaq.org/sam/laserfaq.htm#faqilp
gollark: The main interesting properties lasers have are, also very roughly, that they produce light which can be focused very well and which has very precise/specific frequencies.
gollark: Laser diodes are just things which do that using semiconductors, somewhat like LEDs, and are powered by electricity.
gollark: No. Someone with more physics knowledge could answer better than me, but, very approximately: "laser" stands for "light amplification by stimulated emission of radiation", and describes a specific way to generate light through some magic process using a "gain medium" and optical feedback thing.

See also

References

Aviation - The Pioneer Years

  1. Connections, Episode 6 Part 5 of 5 (1976).
    Also: Burke, James (1978). Connections. Boston: Little, Brown. p. 183. ISBN 0-316-11681-5.


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