I'll self-soar today using my hang glider. Many intrepid flyers joined the 70s' Self-Soar Association S-SA that had "Otto" memberships and membership numbers in honor of Otto Lilienthal who self-soared off a hill he had built. The booklet series Low & Slow and the Hang Glider Weekly (together 216 editions) frequently used the term
"self-soar" to describe flying using a unpowered glider flown after launching by some system without the aid of motors or other persons.
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