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Angara-5 to become Russia's biggest rocket
Following the maiden flight of the Angara-1.2PP space vehicle in July 2014, Russian engineers hoped to quintuple their success with the liftoff of a five-booster configuration of the new-generation rocket. The first such vehicle to fly was designated Angara-A5-1LM, where 1LM stood for the "1st flight machine." Angara-5 will become Russia's most powerful space booster and will eventually replace the nation's workhorse Proton rocket. Unlike Proton, all members of the Angara family will employ relatively non-toxic propellant on all but one upper stage.
Previous chapter: The inaugural flight of the Angara rocket
Above: The Angara-5 rocket configured for the first launch. (CLICKABLE)
Above: The first Angara-5-1LM rocket during its final assembly at GKNPTs Khrunichev in Moscow.
As of beginning of 2014, official Russian sources had released no information on the flight profile of the first Angara-5 rocket, however given its primary role as a carrier of satellites to the geostationary orbit located 36,000 kilometers above the Equator, it was safe to assume that the first launch will demonstrate the capability to do just that. The rocket will be equipped with four URM-1 boosters, acting as the first stage, and a single "core" URM-1, performing the role of the second stage. All five URM-1s will ignite on the ground, however, the central core will operate at lower thrust during the part of the flight. As a result, the four first-stage boosters will consume their propellant and separate first, followed by the separation of the "core" URM-1 booster. The third-stage URM-2 then will take over the powered phase of the flight, delivering its payload section to the initial Earth orbit.
According to Yuri Bakhvalov, Designer General of KB Salyut, which developed the Angara rocket, the payload section will include an upper stage (Briz-M borrowed from the Proton-M rocket), and a dummy satellite. The Briz-M will likely demonstrate a typical mission to deliver a satellite to the so-called geostationary transfer orbit from where the payload would typically transfer itself to the final geostationary orbit with the use of its own propulsion system. Such a mission profile is routinely followed by the Proton-M rocket and many other space vehicles around the world.
On July 14, the first deputy to Roskosmos head Aleksandr Ivanov confirmed in interview with Ekho Moskvy radio station that during its first mission in December, Angara-5 would deliver a mockup of payload to a geostationary orbit.
In an interview with the ITAR-TASS news agency in August 2014, the head of GKNPTs Khrunichev Vladimir Nesterov said that during the first Angara-5 mission, Briz-M will deliver the mockup into a geostationary orbit, however, later, it will be sent into a special burial orbit safe for any active satellites.
Long road to the launch pad
In 2009, when Russian officials initially mentioned a test launch of the Angara-5 rocket, it had to be delayed from the second half of 2011 to the first quarter of 2013. During 2011, the International Launch Services, ILS, a US-based division of GKNPTs Khrunichev responsible for marketing Proton rockets to commercial customers, was offering to deliver a satellite on the first Angara-5 rocket at a discounted rate. However at the beginning of 2013, Khrunichev's publication reported that the vehicle would carry a simulated payload during the mission. On March 1, 2013, GKNPTs Khrunichev announced that the first Angara-A5 rocket had been under development, with its pneumatic and hydraulic systems for tanks and other components undergoing assembly at the time.
By the end of May 2013, the first launch of the Angara-5 rocket was promised in November 2014, however at the beginning of that year, industry sources said that Angara-5 had absolutely no chance of flying before the end of 2014. Most optimistically, the first Angara-5 would be shipped to Plesetsk before the end of 2014, in preparation for launch sometime in 2015. In April 2014, officials at GKNPTs Khrunichev still insisted that the launch would take place in December 2014. The Kremlin officials also confirmed the end of December launch date for Angara-5 after the succesfull flight of the Angara-1.2PP rocket in July.
On Aug. 27, 2014, Russian military officials announced that integrated tests of the first Angara-A5 rocket had been initiated in Plesetsk.
On September 10, a poster on the online forum of the Novosti Kosmonavtiki magazine reported that a recent trip of a surveillance team to the locations where URM-1 boosters were to be dropped during the first launch of the Angara-5 rocket, deemed them unacceptable for the mission. The group discovered that an extremely dense forest at those sites would make it impossible to recover the remnants of the boosters.
According to a typical flight profile, four strap-on boosters of the Angara-5 rocket separate at an altitude of around 82 kilometers around three and a half minutes in flight. They would fall around 850 kilometers to the east from the rocket's launch site in Plesetsk. The central (core) module would separate less than two minutes later at an altitude of 148 kilometers and then would crash 2,320 kilometers downrange.
(This page will be continuously updated as events unfold)
Read (and see) much more about Angara rockets and many other space developments in Russia
Writing and illustrations by Anatoly Zak; Last update: September 10, 2014
Page editor: Alain Chabot; Last edit: June 18, 2014
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A scale model of the Angara-5 rocket. Click to enlarge. Copyright © 2011 Anatoly Zak
Preparations for the rollout of the first Angara-5 rocket. Click to enlarge. Credit: Dmitry Rogozin
Artist renderings of the Angara-5 rocket on the launch pad in Plesetsk. Credit: GKNPTs Khrunichev