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#20
by
Galactic Penguin SST
on 16 Jan, 2013 01:58
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#21
by
jcm
on 16 Jan, 2013 04:13
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All four objects (Rodniks and Briz-KM) now cataloged
39057 1476 x 1502 km x 82.5 deg
39058 1478 x 1501 km x 82.5 deg
39059 1480 x 1503 km x 82.5
39060 1487 x 1504 km x 82.5
so launch success confirmed.
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#22
by
bolun
on 16 Jan, 2013 15:36
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01/15/2013
Rockot Places Three Russian Satellites into Orbit
On January 15, 2013 a Rockot launch vehicle using a Breeze-KM upper stage successfully launched three military communication satellites into orbit. The launch took place at Plesetsk Cosmodrome in Northern Russia. All satellites were injected precisely into their target orbit. This first launch of a Rockot in 2013 will be followed by further Russian federal launches as well as the combined launch of three Swarm satellites by Eurockot Launch Services this year.
http://www.eurockot.com/2013/01/rockot-places-three-russian-satellites-into-orbit/
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#23
by
Star One
on 16 Jan, 2013 17:20
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What the heck is all that orange smoke coming around it, doesn't look healthy?
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#24
by
russianhalo117
on 16 Jan, 2013 17:37
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What the heck is all that orange smoke coming around it, doesn't look healthy?
its normal around the ignition and early launch portion of the flight. It is un-ignited propellant and is a common site for hypergolic boosters.
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#25
by
Star One
on 16 Jan, 2013 17:58
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What the heck is all that orange smoke coming around it, doesn't look healthy?
its normal around the ignition and early launch portion of the flight. It is un-ignited propellant and is a common site for hypergolic boosters.
Thanks. I don't remember seeing anything quite so orange on other launchers, is it something that comes from the fact that it is converted ICBM?
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#26
by
russianhalo117
on 16 Jan, 2013 20:58
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What the heck is all that orange smoke coming around it, doesn't look healthy?
its normal around the ignition and early launch portion of the flight. It is un-ignited propellant and is a common site for hypergolic boosters.
Thanks. I don't remember seeing anything quite so orange on other launchers, is it something that comes from the fact that it is converted ICBM?
it partly has to do with fact that Rockot still uses its silo launch tube above ground and that there is not a flame trench for deflection so it just kind of hangs around. You will see it with Proton to if you watch the flame trench cameras when ignition occurs.
Also Rockot is from UR Booster family in the UR-100 subfamily and uses the same fuel and oxidizer.
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#27
by
orbitaldebris
on 17 Jan, 2013 08:58
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39057 1476 x 1502 km x 82.5 deg
39058 1478 x 1501 km x 82.5 deg
39059 1480 x 1503 km x 82.5
39060 1487 x 1504 km x 82.5
so launch success confirmed.
In all four previous Rokot (Strela-3) launches, the Briz-KM ended up in an orbit with a lower perigee. Did the Briz fail to perform a depletion burn this time I wonder?
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#28
by
anik
on 17 Jan, 2013 09:35
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Did the Briz fail to perform a depletion burn this time I wonder?
Yes.
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#29
by
Skyrocket
on 17 Jan, 2013 09:44
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Did the Briz fail to perform a depletion burn this time I wonder?
Yes.
Mission successful completed, but nevertheless a Briz failure... No good news.
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#30
by
Prober
on 17 Jan, 2013 11:21
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Did the Briz fail to perform a depletion burn this time I wonder?
Yes.
Mission successful completed, but nevertheless a Briz failure... No good news.
Not a very good start for 2013.
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#31
by
Satori
on 17 Jan, 2013 13:07
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Did the Briz fail to perform a depletion burn this time I wonder?
Yes.
Mission successful completed, but nevertheless a Briz failure... No good news.
Not a very good start for 2013.
If the mission was successful with the three satellites placed on the correct orbits, why is this not a very good start for 2013?
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#32
by
Skyrocket
on 17 Jan, 2013 13:52
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Did the Briz fail to perform a depletion burn this time I wonder?
Yes.
Mission successful completed, but nevertheless a Briz failure... No good news.
Not a very good start for 2013.
If the mission was successful with the three satellites placed on the correct orbits, why is this not a very good start for 2013?
Because the failure to reignite for deorbit shows, that there is still something wrong with the Briz stage. This will certainly lead to more delays for the return to flight of the Proton-Briz-combination.
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#33
by
orbitaldebris
on 17 Jan, 2013 14:23
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There's also the possibility of another Briz explosion. Unvented Briz-stages have a tendency to explode and this time the high perigee would mean long-lasting debris.
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#34
by
Stan Black
on 17 Jan, 2013 16:53
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The withdrawl is by high-pressue tanks and the four 11D458?
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#35
by
Danderman
on 17 Jan, 2013 17:14
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The withdrawl is by high-pressue tanks and the four 11D458?
Let me translate this into a question about the final burn being performed not by the main engine, but by the 4 small thrusters that are fed by the high pressure tanks. IIRC, the 4 small thrusters are the same as is used on FGB and MLM, and have a good reliability record; if the perigee drop burn failed due these thrusters not firing, it will be difficult to pinpoint the problem.
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#36
by
Nicolas PILLET
on 17 Jan, 2013 18:20
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IIRC, the 4 small thrusters are the same as is used on FGB and MLM
Yes, you remember correctly !
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#37
by
Galactic Penguin SST
on 17 Jan, 2013 19:08
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#38
by
jcm
on 17 Jan, 2013 22:55
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Is it really known that a perigee lowering burn would have took place? There is a chance that this launch almost reached the maximum capability of the rocket.......
Oh and this really cool video caught the huge fume of reddish hydrazine+N2O4 firing off as the rocket lifted off! http://tvzvezda.ru/news/nocomment/content/pusk_rakety-nositelya_43rokot59_kamera_1601.html
All 4 previous multiple-Strela launches to this orbit did make a burn to lower perigee to 1200 km. The last one with the extra Yubilyeniy payload should have had at least the payload requirements of this one, so I don't think it's plausible to think that the mission didn't plan one.
However, if for some reason the engine was less efficient than usual it's possible depletion was achieved - which would still be bad news for Briz flights but better from the debris-time-bomb perspective, so it's important to know *why* there was no extra burn.
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#39
by
Danderman
on 17 Jan, 2013 23:52
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What we don't know is whether the depletion burns are generated by the main engine to empty the main prop tanks, or the small thrusters to deplete the high pressure tanks.
