Molniya (rocket)
The Molniya (Russian: Молния, meaning "lightning"), GRAU Index 8K78, was a modification of the well-known R-7 Semyorka rocket and had four stages.[1]
|  Molniya-M carrier rocket | |
| Function | Medium launch vehicle | 
|---|---|
| Manufacturer | Energia | 
| Country of origin | Soviet Union | 
| Size | |
| Height | 43.44 m | 
| Diameter | 10.3 m | 
| Mass | 305,000 kg | 
| Stages | 4 | 
| Associated rockets | |
| Family | R-7 | 
| Launch history | |
| Status | Retired | 
| Launch sites | Baikonur, Plesetsk | 
The 8K78 resulted from a crash program by the Korolev Bureau to develop a booster for launching planetary probes. A larger third stage was added along with a fourth stage (Blok L) that was designed to fire in-orbit to send the payload out of LEO. The basic R-7 core was also structurally strengthened and given more powerful engines. A rushed development produced multiple malfunctions of the upper stages, which led to its being replaced by the improved Molniya-M in 1964, but there were enough 8K78s left to continue flying them into 1967.[2][3][4][5] The Molniya also carried early Venera probes to Venus.
Molniya (E6) was a minor revision adapted for launch of some Luna series space probes.
Characteristics
    
- Length: 43.440 m
- Diameter: 10.300 m
- Launch mass: 305,000 kg
References
    
- Harvey, Brian (5 July 2007). Russian Planetary Exploration: History, Development, Legacy and Prospects. p. 73. ISBN 978-0-387-46343-8.
- Encyclopedia Astronautica Molniya-1 Archived 16 May 2008 at the Wayback Machine
- Encyclopedia Astronautica Molniya 8K78M Archived 8 May 2012 at the Wayback Machine
- Encyclopedia Astronautica Molniya-2 Archived 2 June 2012 at the Wayback Machine
- The Soyuz Launch Vehicle: The Two Lives of an Engineering Triumph By Christian Lardier, Stefan Barensky, page 156
"Molniya-M Carrier Rocket". РКЦ Прогресс. Retrieved 7 October 2014.
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