Testing of electrics in SL-4 (Soyuz) launcher

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Testing of electrics in SL-4 (Soyuz) launcher

Electrical check being made to an SL-4 first stage, the type used to launch Russian Soyuz spacecraft into orbit. The SL-4 is the most-used model of orbital launcher, and was derived from the vehicle that carried Sputnik-1 into orbit in 1957. To the end of 1991, it is estimated that 1042 SL-4 launches had been made, with a success rate of 92.8%, carrying manned Soyuz flights as well as a variety of satellites. The first stage, seen here, consists of a core (top left) surrounded by four strap-on boosters. The boosters use the RD-107 engine, comprising four chambers and two smaller steering verniers. The core RD-108 is identical except having four steering verniers

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Flight Launcher Manned Spaceflight Program Programme Rocket Russian Soviet Soyuz Testing

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EDITORS COMMENTS
This print captures the meticulous testing of electrics in the SL-4 (Soyuz) launcher, showcasing the intricate process behind launching Russian Soyuz spacecraft into orbit. The image showcases an electrical check being conducted on an SL-4 first stage, which is renowned as the most-utilized model of orbital launcher worldwide. Derived from its predecessor that propelled Sputnik-1 into orbit back in 1957, this robust vehicle has a remarkable track record. By the end of 1991, an astounding 1042 SL-4 launches had taken place with a commendable success rate of 92.8%. These missions encompassed not only manned Soyuz flights but also deployed various satellites for scientific exploration. The focal point of this photograph lies on the first stage, composed of a core surrounded by four strap-on boosters. The boosters employ the powerful RD-107 engine featuring four chambers and two smaller steering verniers to ensure precise control during flight. Similarly, the core RD-108 engine shares identical characteristics except for having four additional steering verniers. This image offers us a glimpse into Russia's illustrious space program and their relentless pursuit of advancements in manned spaceflight technology. It serves as a testament to their expertise and dedication in pushing boundaries beyond Earth's atmosphere while propelling humanity towards new frontiers in space exploration.

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