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Angara-5 to become Russia's biggest rocket

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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

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Above: The Angara-A5 rocket configured for the first launch. (CLICKABLE)

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Above: The first Angara-A5 rocket during its final assembly at GKNPTs Khrunichev in Moscow.

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Above: The first Angara-A5 rocket is ready for rollout to the launch pad at the beginning of November 2014.

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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 an interview with the 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 marketingProton 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.

Plesetsk were reported departing GKNPTs Khrunichev in Moscow for Plesetsk during the night from July 14 to July 15, 2014.

On Aug. 27, 2014, Russian military officials announced that integrated tests of the first Angara-A5 rocket had been initiated in Plesetsk. By the end of October, Russian authorities released first TV footage from Plesetsk showing five URM-1 boosters of the first and second stage integrated with the URM-2 booster of the second stage.


Above: On Oct. 31 2014, Russian authorities released first TV footage from Plesetsk showing five URM-1 boosters of the first and second stage integrated with the URM-2 booster of the second stage.

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Above: First view of a fully assembled Angara-5 rocket in Plesetsk released on Oct. 31, 2014.

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 some 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.

By the end of September, semi-official Interfax news agency quoting an unnamed official at Roskosmos reported that the first launch of the Angara-5 rocket would "certainly take place after December 25," essentially confirming the delay of the mission until 2015. In turn, this apparent "trial balloon" triggered an avalanche of official denials of any delays and new promises to fire Angara-A5 on December 25. On October 5, the official RIA Novosti news agency quoted the commander of the Air and Space Defense Forces, VKS, Aleksandr Golovko as saying that "all work at the launch site goes as scheduled. On November 20 we have to conduct tests on the launch complex." Golovko apparently referred to a rollout of the Angara-A5 rocket to the launch pad for fit tests. He left a little wiggle room by saying that the launch date would be determined by the State Commission based on the readiness of the launch vehicle.

By November 8, the first Angara-A5 rocket was also topped with a Briz-M upper stage and a payload simulator known as IPM, Russian officials said. According to a spokesman for the Russian Air and Space Forces, VKS, Colonel Aleksei Zolotukhin quoted by TASS news agency, the fully assembled Angara-A5 had already been placed on its transporter/erector inside the assembly building of Technical Facility No. 41 and its personnel was conducting final operations before the rollout of the rocket to the launch pad (for tests). Zolotukhin confirmed that the first launch of the rocket had been planned for December 2014.

Site 35 in Plesetsk, the Russian Ministry of Defense announced. The testing on the pad, including electric checks of the rocket and tests of launch equipment, was scheduled to continue for seven days in preparation for the launch in December, the Russian military said.

According to postings on the online forum of the Novosti Kosmonavtiki magazine, high-pressure tanks of the Briz-M upper stage onboard the Angara were fully loaded prior to its rollout from the assembly building.

On its way to the launch pad, the rocket was to make a stop at a special fueling station, known as KZBND (Fueling Complex for Low Pressure Tanks), where during preparation for routine launches, Briz-M's low-pressure tanks would be filled with toxic propellant. However this test run, launch crews would only conduct fit checks for all the fueling equipment, before the rocket would proceed further to the launch pad.

Upon the arrival to the pad, the transporter erector would install the launch vehicle into the vertical position for a series of integrated tests of the launch facility with the rocket. Tests would involve filling main booster stages of the rocket with propellant, only to drain it later to gain experience with such a procedure.

On the way back to the assembly building after the pad tests, the rocket would make another stop at the KZBND complex. This time, Briz-M's low-pressure tanks would be filled with toxic propellant and then drained as well.

Due to imperfect nature of the propellant drainage system, after the tests, the Briz-M stage could return to the assembly building with as much as 300 kilograms of hazardous propellant still remaining in its tanks. However, project officials were confident that the risk was manageable, since such operations had been well tested in the past. Under less than likely scenario where all tests on the pad were going without a hitch, officials could make a decision not to return the rocket to the assembly building and proceed with the launch ahead of schedule, industry sources said.

On November 26, RIA Novosti finally confirmed that the testing of Angara-A5 on the launch pad, including the fueling of the vehicle, had been completed and the rocket had been returned to the assembly building for final launch preparation scheduled for December 2014. However a spokesman for the Ministry of Defense quoted by the agency did not specify how long the rocket had been on the pad or when it had been returned to the assembly building.

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Above: On December 1, official Russian TV showed the Angara-A5 rocket inside the assembly building with its payload section separated from the rest of the vehicle.


Read (and see) much more about Angara rockets and many other space projects in Russia
in a richly illustrated, large-format glossy edition:






Components of the Angara-A5 rocket for the first flight:

Component
Manufacturing designations, series

Angara-A5 (1LM) vehicle
14A127, Series No. 71751
Briz-M upper stage
14S43 No. 88801
Payload simulator
TPS2 DT-24 No. 1210483
Five RD-191 engines
D014, D0??, D0??, D018, D019
Four strap-on boosters
BB1, BB2, BB3, BB4
 
Wow, that's alot of postponement. When is the launch suppose to take place?
Good luck to Russia on this mission.:cheers:
 
proton rocket = atomic propulsion ?

Proton :

540px-Proton_Zvezda_crop.jpg


Function Orbital launch vehicle
Manufacturer Khrunichev
Country of origin Soviet Union; Russia
Size
Height
53 metres (174 ft)
Diameter 7.4 metres (24 ft)
Mass 693.81 metric tons (1,529,600 lb) (3 stage)
Stages 3 or 4
Capacity
Payload to LEO
20.7 metric tons (46,000 lb)
Payload to
GTO
6 metric tons (13,000 lb)
Launch history
Status
Active
Launch sites Baikonur, LC-200 & LC-81
Total launches 399 (21 Oct 2014)
Successes 353
Failures 46
First flight Proton: 16 July 1965
Proton-K: 10 March 1967
Proton-M: 7 April 2001
Last flight Proton: 6 July 1966
Proton-K: 30 March 2012
Notable payloads Salyut 6 & Salyut 7
Mir & ISS components
ViaSat-1
First stage
Engines
6 RD-275
Thrust 10.47 MN (1.9 million pounds)
Burn time 126 s
Fuel N2O4/UDMH
Second stage
Engines
3 RD-0210 & 1 RD-0211
Thrust 2.399 MN (539,000 lbf)[1]
Burn time 208 s
Fuel N2O4/UDMH
Third stage
Engines
1 RD-0212
Thrust 630 kN (140,000 lbf)
Burn time
Fuel
N2O4/UDMH
Fourth stage - Blok-D/DM
Engines
RD-58M
Thrust 83.4 kN (18,700 lbf)
Burn time
Fuel
LOX/RP-1
 
Angara-5's maiden voyage

During its first test launch, Angara-A5 is expected to demonstrate its ability to deliver cargo into geostationary orbit 36,000 kilometers above the Equator, the destination for most communications satellites. However, the maiden mission will only carry a payload simulator, rather than an operational spacecraft. After reaching its target, the dummy satellite will be boosted into a safe "burial" orbit, away from heavy space traffic.




Previous chapter: History of the Angara-5's first mission

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Above: The flight profile and a ground track of the Angara-5 launches from Plesetsk.

Pre-launch process

Preparations for the launch of the first Angara-A5 rocket were conducted largely in secret, however postings on the online forum of the Novosti Kosmonavtiki magazine based on the information from the launch of the Angara-1.2PP rocket in July 2014, allowed to assume following details from the final countdown preceding a scheduled liftoff on Dec. 23, 2014, at 08:57:25 Moscow Time (12:57 a.m. EST):

December 22

23:57 Moscow Time (T-9 hours): Preparations of the launch complex' hardware for the fueling of the launch vehicle and the retraction of service access bridges to the vehicle. The Pre-launch Preparation Program, PSP, is activated.

December 23

00:02 Moscow Time (T-8 hours 55 minutes): Beginning of preparation for the propellant loading into the launch vehicle's main tanks.

Around 05:00 (T-4 hours): Beginning of the cooling of the liquid oxygen fueling system for loading cryogenic oxidizer of the launch vehicle's third stage. Beginning of the kerosene fuel loading into the main tanks and the engine's bottles; filling of pneumatic systems with nitrogen and helium.

Around 06:00 Moscow Time (T-3 hours): Beginning of the cooling of the launch vehicle's oxidizer tanks, filling of the helium bottles inside the tanks. The completion of fuel loading onboard the rocket.

Around 07:00 Moscow Time (T-2 hours): The completion of oxidizer loading onboard the rocket.

Around 08:00 Moscow Time (T-1 hour): Refilling of the oxidizer tank on the third stage.

08:42: Pre-launch operations with the flight control and propulsion system of the launch vehicle.

08:54: Drainage of the oxidizer from launch vehicle's supply lines. Pre-launch pressurization of the first and second stages.

08:54:40: Undocking and retraction of oxidizer umbilicals.

08:57:25 LIFTOFF!

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 ignite on the ground, however the core module operates at lower thrust during the middle part of the flight. As a result, the four first-stage boosters consume their propellant and separate first, while the core URM-1 booster can continue to fire.

According to a known flight profile, after 47 seconds of ascent at full thrust, the RD-191 engine on the central booster throttles down to 30 percent of its thrust capability. The four boosters of the first stage separate 213 seconds into the flight at an altitude of around 82 kilometers and impact the ground from 850 to 890 kilometers downrange in the Sosnogorsk Region of the Komi Republic.

The core stage returns to full thrust and fires for a total of 325 or 329 seconds. It separates from the third stage at an altitude of 148 kilometers with the help of small solid motors installed "backwards" at the very top of the rocket's transfer compartment. The stage then crashes in the Tomsk Region, around 2,300 kilometers from the launch pad. The epicenter of the impact site for the second stage is located in the Kargasok Region, 70 kilometers southeast of the border with the Parabelsk Region.

Following the separation of the core stage, the URM-2 ignites its RD-0124 engine to accelerate the payload section to nearly orbital speed. In a typical mission, the URM-2 fires until T+750 seconds in flight then separates and splashes down in the Pacific Ocean, off the coast of Philippines, 7,775 kilometers from the launch site.

The upper (fourth) stage completes the orbital insertion process with a short firing of its engine to enter an initial parking orbit with an altitude ranging from 180 to 250 kilometers. In the first Angara-5 mission, this job will be performed by the Briz-M upper stage, previously employed on the Proton rocket. As a result, the subsequent flight scenario will likely resemble that of a typical Proton mission to the geostationary orbit.

During a nine-hour period, the Briz-M usually conducts five engine firings to enter an initial parking orbit and then to climb to a geostationary transfer orbit with its apogee (highest point) at an altitude of around 36,000 kilometers. The final maneuver is also used to do most of the orbital inclination adjustment to match the plane of the Equator.

Given the fact that Russian satellites are traditionally delivered directly into geostationary orbit rather than being dropped at an intermediate orbit like it is usually the case with many Western satellites, Briz-M will likely make another maneuver at the apogee of the elliptical geostationary transfer orbit to make it circular at an altitude of around 36,000 kilometers.

After the separation from its payload, Briz-M usually maneuvers itself into a "burial" orbit, where its tanks are depressurized to avoid an accidental explosion producing space junk. During Angara-5's test flight, Briz-M can take its dummy cargo with it, instead of releasing it into the busy geostationary orbit.

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.


 
Interesting that BBC news is totally silent about the launch. Even its Science and Environment section, which rarely misses the beat of a butterfly's wing has nothing on this.
 
This rocket is a beast! Onward Angara!!!
 

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