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Én azt hiszem érdemes volna ezzel is
foglalkozni annál is inkább mert már most nagy versenyeket rendeznek Old Timer U-Control modelleknek.
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Jim Walker was granted the patent for his system of two line system of control line flying in 1942. Jim Walker held the patent for the system he called U-Control for 12 years. After a four year court battle concerning infringements, his patent was "nullified". The decision was not contested because of Jim Walker's failing health, so the patent was lost, this was a devistating blow to Jim Walker. None of us can contest the contributions of Jim Walker to the model aviation community and the promotion of Control Line as a major sport. We offer the original patent application as a historical document, part of our control line past.
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Néhány ezzel kapcsolatos " felfedezésem":
http://www.aeromaniacs.com/Suppliers.html
http://www.americanjuniorclassics.com/
http://www.americanjuniorclassics.com/W ... patent.htm
http://www.americanjuniorclassics.com/W ... rkshop.htm
Welcome to Jim Walker's Workshop
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Jim Walker, born in 1904, died in 1958 and left 31 patents, which bring him to the forefront of model aircraft industry inventors. Jim's inventions include the two wire U-Control flying system, the sonic-controlled glider, the American Junior Folding Wing Interceptor, the U-Reely hand control and more.
Jim Walker was always working on new technologies. He invented a sound-control glider with a diaphram built into its side. Jim ran beneath the glider tooting on a horn, steering the thing about like any R/C rudder job.
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