About the hobby • According to the Academy of Model Aeronautics, model airplanes were invented in the 19th century to test theories of flight. • Building model planes became a popular hobby in 1920s. ...
https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!154216~!0#focus ...
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