Variably convergent exhaust nozzle for a model ducted fan unit

Details Variably convergent exhaust nozzle for a model ducted fan unit Variably convergent exhaust nozzle for a model ducted fan unit

1988-03-16

1989-07-25

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Reaction motor discharge nozzle

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

23926543, 239602, F02K 130

Patent

active

048505358

ABSTRACT:
The present invention is a variably convergent exhaust nozzle includes a ring, pluralities of first inner leaves, second inner leaves, lever-arms and hinges and a cable for use with a ducted fan unit and a driving mechanism. The ring has a peripheral edge. Each of the first and second inner leaves is formed out of a semiflexible material and has a first and end and a second end. The first and second inner leaves are distributed along the peripheral edge of the ring. The first leaves are fixedly coupled to the ring at their first ends. The second inner leaves overlap the first inner leaves. The first end of each second inner leaf is fixedly coupled to adjacent first ends of the first inner leaves. Each lever-arm contacts one of the first inner leaves. The hinge pivotally couples each lever-arm to the peripheral edge of the ring so that each lever-arm may pivot adjacent to the first end of one of the first inner leaves in order for its second end to press against the second end of one of the first inner leaves. The cable is threaded through each lever-arm adjacent to its second end. The driving mechanism provides tension to the cable thereby pulling the lever-arms and the first inner leaves together at their respective second ends so that the variably convergent exhaust nozzle is slightly convergent in order to maximize thrust and substantially more convergent to maximize top speed.

REFERENCES:
patent: 2603062 (1952-07-01), Weiler et al.
patent: 2608053 (1952-08-01), Davidson
patent: 2634578 (1953-04-01), Kallal
patent: 2693078 (1954-11-01), Laucher
patent: 2927424 (1960-03-01), Hyde
patent: 3231197 (1966-01-01), Strom
patent: 3460763 (1969-08-01), Kopp

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