Description
The S-5 is a 55 mm (2.2 in) calibre unguided rocket fired from a 57 mm calibre tube. It is used by fighter bombers and helicopters. It consists of a steel body containing a solid fuel rocket, and a high explosive warhead with a mechanical impact fuze. At the rear of the rocket is an elongated exhaust nozzle, attached to which are eight forward folding fins. The fins fold around the rocket when it is stowed in its launch tube, springing back as soon as it leaves the launch tube. In flight the fins provide stabilizing spin to the rocket, spinning it at approximately 750 rpm. The solid rocket motor burns for just 1.1 seconds, during which time it covers about 300 meters.
The S-5 is carried in rocket pods, with 4 - 32 rockets. The first were ORO-57 launchers, made in variants with capacity of 4, 8 and 16 rockets. Most typical became ORO-57K for 8 rockets, used especially with MiG-19. Then, from early 1960s, typical launcher became UB-16-57, with 16 rockets, developed in several variants, for helicopters and planes. UB stands for "universal block", for it could be carried on typical bomb hardpoints, "57" is referring to the actual diameter of the launch tube (the diameter of the rocket plus 2 mm). First variant and UB-16-57U had conical forward part, next variant UB-16-57D had blunt forward part. From 1968, a variant UB-16-57UMP was produced, with conical forward part and sticking out five inner tubes. In the 1970s there was developed an ultimate launcher UB-32 with 32 rockets, carried by heavier aircraft. In Poland, Mars-2 launcher was developed for 16 rockets, and in Romania, LPR 57 launchers for 16 rockets.
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