Ammunition and explosives – Pyrotechnics – Rocket
Patent
1988-10-17
1989-12-26
Brown, David H.
Ammunition and explosives
Pyrotechnics
Rocket
102340, 102354, 102377, 102387, F42B 412, F42B 1502
Patent
active
048890537
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a projectile equipped with a braking parachute. More particularly, the present invention relates to a projectile including a receiving chamber delimited by an interior wall for a braking parachute which can be ejected by a piston that is longitudinally displaceable in the projectile, with the piston being chargeable by an ignitable pyrotechnic charge and with the braking parachute being surrounded by a longitudinally divided sleeve which at one end is in engagement with the piston.
Such a projectile is disclosed in DE-OS No. 2,824,203, in which a brake band or braking parachute is disposed within two half shells which are disposed flush with the interior walls of the receiving chamber for the brake member. The brake member is connected with a fuze of the projectile and can be ejected from the projectile by way of a piston engaging at the half shells. The ejection occurs from the tail end, with the component carrying the fuze being sheared from the projectile body and ejected forwardly. Aside from the fact that this prevents the entire projectile from being recovered, the likewise ejected piston and the remaining projectile body may interfere with deployment of the brake member since the former are disposed in the path of flight of the fuze.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a projectile of the above-mentioned type which can be recovered completely or in part and in which deployment of the braking parachute is not interfered with by other components.
This object is accomplished according to the present invention by a projectile including a receiving chamber delimited by an interior wall for a braking parachute which can be ejected by a piston that is longitudinally displaceable in the projectile, with the piston being chargeable by an ignitable pyrotechnic charge and with the braking parachute being surrounded by a longitudinally divided sleeve which at one end is in engagement with the piston, and wherein: the rear of the receiving chamber is sealed by a cover which can be ejected by the piston and which is in engagement with the other end of the sleeve; the braking parachute is fastened to the piston; the projectile, or a part thereof connected with projectile components which are to be recovered, is provided, at the rear exit end of the receiving chamber, with a catch ring for the piston, with the catch ring allowing passage of the sleeve; and guides for the sleeve are provided at the interior wall of the receiving chamber.
The braking parachute is ejected toward the rear and the piston to which the braking parachute is fastened is caught in the projectile to be recovered or in a part which is connected with components to be recovered. A cover at the tail end is sheared off and its rotational imbalance causes it to leave the trajectory of the projectile due to the rotation of the projectile so that it cannot interfere with deployment of the braking parachute.
Further features of the invention will be found in the description below and in the dependent claims.
The invention will now be described in greater detail with reference to embodiments illustrated in the attached drawing figures. .
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a longitudinal sectional view of a projectile equipped with a braking parachute.
FIG. 2 is a sectional view of the projectile of FIG. 1 with ejected braking parachute.
FIG. 3 is a longitudinal sectional view of a further embodiment of a projectile.
FIG. 4 is a sectional view along line IV--IV of FIG. 3.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The projectile shown in FIG. 1 includes a projectile body 1 provided with fins 2 at the rear and with a circularly cylindrical receiving chamber 4 which is defined by an interior wall 3 and is delimited at the front by an insert ring 5 connected by way of shear pins 6 with projectile body 1. Insert ring 5 is provided with a bore to accommodate a flame capsule 7 which can be ignited by way of an electrical fuze 8 disposed at the front
REFERENCES:
patent: 3038407 (1962-06-01), Robertson et al.
patent: 3487781 (1970-01-01), Oss
patent: 3730099 (1973-05-01), Schopp
patent: 3791300 (1974-02-01), Prochnow et al.
patent: 3834312 (1974-09-01), Simmons
patent: 4226185 (1980-10-01), Tobler et al.
Grosswendt Werner
Simon Walter
Unterstein Klaus
Brown David H.
Rheinmetall GmbH
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