Aircraft propulsive power unit

Details Aircraft propulsive power unit Aircraft propulsive power unit

1995-12-11

1998-03-24

Kashnikow, Andres

Aeronautics and astronautics

Retarding and restraining devices

Friction brakes

244130, 244204, B64C 2100

Patent

active

057303932

ABSTRACT:
An aircraft propulsive power unit having an engine (20), a nacelle structure (12) which houses the engine (20) and which has an exterior low drag boundary surface (16) which is subjected to exterior air flow in a boundary layer adjacent the boundary surface (16) and an air flow disruption device (19) activatable to cause at a control location in the boundary surface disruption of exterior air flow in the boundary layer at the control location without reversal or deflection of engine thrust gaseous flow. Where the power unit is a turbofan and the nacelle structure includes a fan duct (22) with inner and outer fan duct walls (25,26) the air flow disruption device (19) is additionally or alternatively activatable to cause at a control location in the outer fan duct wall (26) disruption of air flow in the boundary layer at the control location.

REFERENCES:
patent: 2650752 (1953-09-01), Hoadley
patent: 3097817 (1963-07-01), Towzey
patent: 4039161 (1977-08-01), Baver
patent: 4175640 (1979-11-01), Birch et al.
patent: 4664345 (1987-05-01), Lurz
patent: 4979699 (1990-12-01), Tindell

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