GB1258044A - - Google Patents

Abstract

1,258,044. Rockets. BRISTOL AEROJET Ltd. 1 Jan., 1969 [2 Nov., 1967], No. 49902/67. Heading F3A. An unguided rocket, e.g., for carrying meterological instruments, comprises a forward section 1, Fig. 1, for carrying the instruments and having no propulsive motor, a central section 2 containing a sustainer rocket motor, and a rear section (not shown) which comprises a booster rocket motor, the rear section being separable from the central section shortly after launch, and means for separating the sections 1 and 2 during upward flight of the rocket, the arrangement being such that at least between the point of separation and apogee the section 1 is aerodynamically stable, i.e. the longitudinal axis of the section is substantially aligned with the path along which the section travels, whilst the section 2 between the point of separation and its landing is aerodynamically unstable, i.e., it tumbles about its path. The sections 1 and 2 are held together by explosive bolts (not shown). A parachute 4 connected to the section 2 by an asymmetrical articulated linkage 7 unfurls following separation of the sections and renders the section 2 aerodynamically unstable. Folded stabilizing fins (not shown) are erected on the section 1 by springs following separation. A parachute 3 is also unfurled after the apogee to slow the section 1 down. In another embodiment, Fig. 6, the forward section is stabilized after separation by the erection of a cone 13 of fabric supported by a telescopic mast 10 and an inflatable tube 11. The fabric cone disintegrates when the section enters the denser atmosphere during the latter stages of its descent and control of the descent is taken over by a parachute 15. A mesh 12 of radar reflecting material aids tracking.