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Summary
Figure-1 from U.S. Patent Re19,412, "Aircraft and Control Thereof," dated January 1, 1935, E.F. Zaparka, inventor. This patent describes, and this image shows, a movable "microflap" similar to the fixed Gurney flap independently discovered and first used by Dan Gurney in 1971.
Tags
patents
patent drawings
us patent office
airfoils and wing cross sections
aviation patent drawings
gurney flaps
united states patent drawings
inventions
technology
Date
1935
Source
USPTO
Link
Copyright info
public domain