Lufbery circle
nounEtymology Named after fighter ace Raoul Lufbery (1885–1918), though he was not the inventor.
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Aeronautics, Aerospace, Aviation, Business, Engineering, Government, Military, Natural sciences, Physical sciences, Politics, War A defensive combat tactic in which multiple aircraft form a horizontal circle in the air when attacked, so that the armament of each aircraft offers a measure of protection to the others.