The McLaren emblem logo has three theories about its red swoosh's origin.
The most probable theory: The shape of swoosh is related to vehicle aerodynamics. Specifically, it represents the swirling vortices generated from the rear of the vehicle in the wind tunnel.
The 2nd theory: The shape of swoosh is derived from the Marlboro's red logo, which was contracted as the F1 sponsor in 1981.
The 3rd theory: The shape of swoosh is derived from the flightless bird kiwi that lives in New Zealand, the hometown of the McLaren founder Bruce Leslie McLaren.