Noun
NOTAR
(aviation) Acronym of no tail rotor, a helicopter anti-torque system which replaces the use of a tail rotor.
NATO reporting name Hokum. ; Ka-52 "Alligator" 1997: two seat attack helicopter and widely used model ; Ka-118 1980s-1990s: A NOTAR development - light multirole helicopter ; Ka-126 1980s: Light utility helicopter. Source: Internet