|UR-500 Monoblock - UR-500 conventional 'monoblock' configuration studied at the beginning of the program. This design was slightly lighter than the selected 'polyblock' configuration but had disadvantages in the missile role: difficult ground handling and payload access.|
Credit: © Mark Wade. 6,880 bytes. 48 x 414 pixels.
During UR-500 design studies, two variants of the first stage were considered: polyblock and monoblock. The monoblock approach was that the first stage be assembled from two separate modules with the same diameter: an upper oxidiser module and a lower fuel and engine block. In assembly trials of this design it proved difficult, because of the height of the first stage, to obtain access to the upper stages and payload atop the rocket. Although there was a payload advantage compared to the more compact polyblock design, this was relatively small and outweighed by the operational difficulties. This variant was studied by Chelomeiís Filial Number 1, Chief Designer V N Bugayskiy, under the lead engineer M S Mishetyan.
The design mass and engine performance figures for this version have been given; the calculated payload is 12,000 kg.
LEO Payload: 12,000 kg. to: 200 km Orbit. Liftoff Thrust: 827,990 kgf. Total Mass: 543,400 kg. Core Diameter: 6.2 m. Total Length: 54.0 m.
|Universal Rockets - Chelomei's Universal Rocket Family. From left to right: UR-200. Original UR-500 configuration, composed of clustered UR-200's. Conventional UR-500 monoblock configuration. Selected UR-500 polyblock configuration. UR-500 two-stage configuration as flown. UR-500K configuration with Block D upper stage.|
Credit: © Mark Wade. 36,031 bytes. 630 x 351 pixels.