Dnepr (rocket)

The Dnepr rocket (Template:Langx; Template:Langx) was a space launch vehicle named after the Dnieper River. It was a converted ICBM used for launching artificial satellites into orbit, operated by launch service provider ISC Kosmotras. The first launch, on April 21, 1999, successfully placed UoSAT-12, a 350 kg demonstration mini-satellite, into a 650 km circular Low Earth orbit.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

History

File:Dnepr 2013.ogv

Dnepr launch video

The Dnepr was based on the R-36MUTTH Intercontinental ballistic missile (ICBM)Template:Spaced ndashcalled the SS-18 Satan by NATOTemplate:Spaced ndashdesigned in the 1970s by the Yuzhnoe Design Bureau in Dnepropetrovsk, Ukrainian SSR. among the outstanding authors of the project there are people like Boris Gubanov, Sergey Sopov.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

The Dnepr control system was developed and produced by the JSC "Khartron", Kharkiv. The Dnepr was a three-stage rocket using storable hypergolic liquid propellants. The launch vehicles used for satellite launches have been withdrawn from ballistic missile service with the Russian Strategic Rocket Forces and stored for commercial use. A group of a total of 150 ICBMs were allowed under certain geopolitical disarmament protocols to be converted for use, and can be launched through 2020. The Dnepr was launched from the Russian-controlled Baikonur cosmodrome in Kazakhstan and the Dombarovsky launch base, near Yasny, in the Orenburg region of Russia.

In February 2015, following a year of strained relations including the Euromaidan and the Russo-Ukrainian war, Russia announced that it would sever its "joint program with Ukraine to launch Dnepr rockets and [was] no longer interested in buying Ukrainian Zenit boosters, deepening problems for [Ukraine's] space program and its struggling Yuzhmash factory."<ref name=pa20150206>Template:Cite news</ref> However ISC Kosmotras reported that they would continue to fulfill their obligations for three Dnepr launches in 2015,<ref name=sfn20150206> Template:Cite news</ref> of which only one took place.<ref name="gcat-r36">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

By the end of 2016, no further launch had materialized and the remaining customers had switched to alternative launch providers.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref name=retired />

ISC Kosmotras proposed using a Dnepr rocket to launch a modified version of the Soyuz spacecraft with no orbital module and reduced service module, intended as a recoverable microgravity laboratory or an emergency vehicle for cosmonaut rescue.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>Template:Better source needed

Business magnate Elon Musk tried to purchase refurbished Dnepr rockets for a low price from Russia but returned empty-handed after failing to find any that were affordable. This led him to the creation of a successful private rocket launch company now known as SpaceX.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>Template:Cite news</ref>

Performance

The Dnepr launch vehicle had only a small number of modifications compared to the R-36M ICBM in service. The main difference was the payload adapter located in the space head module and modified flight-control unit. This baseline version could lift 3,600 kg into a 300 km low Earth orbit at an inclination of 50.6°, or 2,300 kg to a 300 km Sun-synchronous orbit at an inclination of 98.0°. On a typical mission the Dnepr deployed a larger main payload and a secondary payload of Miniaturized satellites and CubeSats.

Launch history

Before the Dnepr entered commercial service it was in service with the Strategic Rocket Forces which launched the ICBM version over 160 times with a reliability of 97%. The rocket had been used several times for commercial purposes with a single failure.

The Dnepr has at two points held the record for the most satellites orbited in a single launch; the April 2007 launch with 14 payloads held the record until 20 November 2013, when an American Minotaur I placed 29 satellites and two experiment packages into orbit.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The next day a Dnepr re-took the record, placing 32 satellites and an experiment package bolted to the upper stage into low Earth orbit.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> This record was broken by an Antares launch in January 2014 which carried 34 spacecraft.

Flight	Date (UTC)	Payload	Orbit	Site
1	April 21, 1999 04:59	UoSAT-12	LEO 650 km / 65˚	Baikonur
2	Template:Nobr 10:05	Template:Hlist	LEO 650 km / 65˚	Baikonur
3	December 20, 2002 17:00	Template:Hlist	LEO 650 km / 65˚	Baikonur
4	June 29, 2004 06:30	Template:Hlist	SSO 700 × 850 km / 98˚	Baikonur
5	August 23, 2005 21:10	Template:Hlist	SSO 600 × 550 km / 98˚	Baikonur
6	July 12, 2006 14:53	Genesis I (USA)	LEO 560 km / 65˚	Yasny
7	July 26, 2006 19:43	Template:Hlist	failed to reach orbit	Baikonur
8	April 17, 2007 06:46	Template:Hlist	Template:Nobr<ref>{{#invoke:citation/CS1|citation	CitationClass=web }}</ref> ||Baikonur
9	June 15, 2007 02:14	TerraSAR-X	citation	CitationClass=web }}</ref> || Baikonur
10	June 28, 2007 15:02	Genesis II	LEO 560 km / 65˚	Yasny
11	August 29, 2008 07:16	RapidEye 1-5	citation	CitationClass=web }}</ref> || Baikonur
citation	CitationClass=web }}</ref> || October 1, 2008 06:37 || THEOS || SSO || Yasny
13	July 29, 2009 18:46	Template:Hlist	SSO	Baikonur
14	April 8, 2010 13:57	Cryosat-2	Polar	Baikonur
citation	CitationClass=web }}</ref> || June 15, 2010 14:42 || Template:Hlist || SSO || Yasny
16	June 21, 2010 02:14	TanDEM-X	LEO	Baikonur
citation	CitationClass=web }}</ref> || August 17, 2011 07:12 || Template:Hlist || LEO || Yasny
citation	CitationClass=web }}</ref> || August 22, 2013 14:39 || KOMPSat-5 || LEO || Yasny
citation	CitationClass=web }}</ref> || November 21, 2013 07:10 || Template:Hlist|| LEO || Yasny
citation	CitationClass=web }}</ref> || June 19, 2014 19:11 || Template:Hlist || LEO || Yasny
citation	CitationClass=web }}</ref> || November 6, 2014 07:35 || Template:Hlist || LEO || Yasny
citation	CitationClass=web }}</ref> || March 25, 2015 22:08 || KOMPSat-3A || LEO || Yasny

Launch failure

The committee investigating the failed launch on July 26, 2006, concluded that the failure was caused by a malfunctioning of the pumping hydraulic drive of combustion chamber #4. The control malfunctioning brought about the disturbances, which led to the roll instability, excessive dispersions of the yaw and pitch angles. Thrust termination occurred at 74 seconds after lift-off. The crash site was located 150 km from the launch pad in an unpopulated area of Kazakhstan. Toxic propellants polluted the crash site, forcing Russia to pay US$1.1m in compensation.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The rocket used for this launch was more than twenty years old. Procedures for launch have been changed to prevent future malfunctions of this kind.

See also

• Comparison of orbital launchers families
• Dnipro (anti-air missile)
• Minotaur (rocket family), US launch vehicles made from converted ICBMs

External links

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