Rocket exhaust recirculation obturator for missile launch tube

Details Rocket exhaust recirculation obturator for missile launch tube Rocket exhaust recirculation obturator for missile launch tube

1987-11-09

1989-01-10

Brown, David H.

Ordnance

Rocket launching

Having tubular guide means

89 18, 89 1809, F41F 304

Patent

active

047965100

ABSTRACT:
A rocket exhaust recirculation obturator or cover member is designed to extend across the base of a missile in a launch tube between the exit nozzle of the missile rocket exhaust and the walls of the launch tube. The cover member has a central opening which seals against the rocket motor nozzle exit, and an outer periphery which seals against the launch tube walls. During launch, pressure of exhaust gases recirculating back up the launch tube will urge the obturator against the base of the missile, and both the missile and obturator will accelerate together up the launch tube. A release assembly is provided at the upper end of the launch tube which engages corresponding release devices at the outer periphery of the obturator. The engagement releases the pressure bond between the obturator, the missile base, and the launch tube. This allows the rocket exhaust to impinge upon the upper surface of the obturator in opposition to the obturator's momemtum. The exhaust impingement forces the obturator back down the launch tube, eliminating debris outside the launch tube.

REFERENCES:
patent: 2998754 (1961-09-01), Bialy
patent: 3146669 (1964-09-01), Wolf
patent: 3182554 (1965-05-01), Barakauskas
patent: 3289533 (1966-12-01), Brown
patent: 4044648 (1977-08-01), Piesik
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patent: 4433848 (1984-02-01), Williams
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patent: 4485719 (1984-12-01), Mendelsohn et al.
patent: 4604940 (1986-08-01), Mendelsohn et al.
patent: 4686884 (1987-08-01), Piesik

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