Aircraft nozzle control apparatus

Details Aircraft nozzle control apparatus Aircraft nozzle control apparatus

1987-11-24

1992-11-10

Carone, Michael J.

Fluid sprinkling, spraying, and diffusing

Reaction motor discharge nozzle

With means controlling amount, shape or direction of...

244 125, B64C 2904

Patent

active

051617412

ABSTRACT:
The invention concerns nozzle control apparatus for VSTOL aircraft power plant having at least one vectorable thrust nozzles 22. The apparatus comprises oscillating means for oscillating the nozzles about a generally vertical axis (at least) so as to enlarge the area 30 affected by the exhaust gases 25, 26 from the nozzles 22 during hovering and/or landing.
In the prior art, the hot jet 26 impinges on a relatively small area 30 of the surface 12 which area rapidly exhibits erosion effects; it has been found that the erosion is generally proportional to the local rate of heating, with a surface time constant of a few seconds. Accordingly, ground/deck erosion is alleviated by spreading out the jets 25, 26 and especially the latter to increase their `footprint`, i.e. if the area 32 of the surface 12 being heated is enlarged.

REFERENCES:
patent: 4000854 (1977-01-01), Konarski
patent: 4280660 (1981-07-01), Wooten
patent: 4343446 (1982-08-01), Langley
patent: 4660767 (1987-04-01), Scrace

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