Airbus patents an improved dome for its helicopters to counter the dreaded problem of "tail-shake"

Helicopters generally suffer from a problem called “tail-shake” where the tail is aerodynamically excited due to impact of disturbances generated by the lift rotor.

Image Credit - inSiDE
Image Credit – inSiDE

This causes discomfort to the crew/passengers and also deteriorates parts of the helicopter.

Airbus has now solved this problem with an innovative dome arranged on the head of the lift rotor.

PatentYogi_Helicopter rides to become smoother1

The dome deflects the flow of air downstream from the lift rotor in a downward direction. The flow of air is then deflected mainly towards the covers and the tail boom, and no longer towards the stabilizer and the fin of the rotorcraft.

PatentYogi_Helicopter rides to become smoother2

In addition, the exterior surface of the dome includes bulges and recesses. This serves to generate a pulsed flow of air generated by the lift rotor that helps eliminate the tail-shake effect.

Helicopter rides will become smoother with this technology.

Patent Information
Publication number: US 20160137296
Patent Title: ROTOR DOME, A ROTOR, AND A ROTORCRAFT
Publication date: May 19, 2016
Filing date: Nov 12, 2015
Inventors: David ALFANO; Damien DESVIGNE; Raphael FUKARI;
Original Assignee: AIRBUS HELICOPTERS

US20160137296

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