Aerofoil
AssigneeGKN Westland Helicopters Limited
InventorsFrederick John Perry, Robert John Harrison, Alan Brocklehurst
Life of this patent
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Abstract
An aerofoil comprises a leading edge and a trailing edge which define a mean chord length, and the aerofoil having an inner or root end adapted for attachment to an aircraft, and an outer end which includes a tip which is adapted in use to divide the airflow into two generally equal vortices one being an inner vortex and the other being an outer vortex the inner vortex being arranged to trail from an outer edge of a forward region of the tip and pass over a rear region of the tip.
Claims15
An aerofoil comprising a leading edge and a trailing edge defining a chord length and having an inner end adapted for attachment to an aircraft and an outer end which includes a tip which is adapted in use to divide the airflow into two generally equal vortices, one being an inner vortex and the other being an outer vortex;
- the inner vortex being arranged to trail from an outer edge of a forward region of the tip and pass over an upper surface of a rear region of the tip and the inner and outer vortices being spatially separated by a distance greater than 0.6 of the chord length, an extreme outer tip edge of the rear region of the tip being of an outwardly and rearwardly swept configuration.
Dependencies are inferred from the claim text.