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http://en.rian.ru/russia/20101217/161818653.html
"The recent loss of three Glonass-M satellites in space was the result
of a series of mistakes made by the Russian Energia rocket
corporation, the head of the Russian state commission probing the
incident said on Friday.
'The preliminary results of the investigation commission indicate that
Energia miscalculated how much fuel needed to be loaded into the DM-3
rocket booster,' said investigation commission head Gennady Raikunov,
who also leads the Central Scientific Research Institute of Machine
Building.
'The amount of oxidant exceeded the norm by 1-1.5 tons and excessive
weight prevented the Proton-M rocket from putting the satellites into
calculated orbit,' the official said.
He added that the company's management had not carried out all the
necessary pre-launch safety procedures and had failed to spot the
mistake in calculations."
http://news.yahoo.com/s/afp/20101217/sc_afp/russiaspacetechnology_20101217170038
"The costly launch failure that caused Russia to delay the deployment
of its own satellite system was the result of a fuel miscalculation, a
commission charged with probing the accident said Friday.
. . . Space officials said the calculation mistake was easy to
correct, and that they were relieved that there was nothing wrong with
the actual rocket itself.
'We have no questions regarding the Proton,' investigating commission
chief Gennady Raikunov told the Interfax news agency. 'Its launches
could be resumed.'
Raikunov said the fault lay with the Energia Rocket And Space
Corporation, which designed the carrier.
He said that the company failed to account for the fact that the
updated version of the rocket had bigger fuel tanks, which weighed
more when filled to the top.
'This increased the payload weight and the rocket did not have the
energy to deliver the satellites to orbit,' the space official said."
Corporate web site:
http://www.energia.ru/english/index.html
"The recent loss of three Glonass-M satellites in space was the result
of a series of mistakes made by the Russian Energia rocket
corporation, the head of the Russian state commission probing the
incident said on Friday.
'The preliminary results of the investigation commission indicate that
Energia miscalculated how much fuel needed to be loaded into the DM-3
rocket booster,' said investigation commission head Gennady Raikunov,
who also leads the Central Scientific Research Institute of Machine
Building.
'The amount of oxidant exceeded the norm by 1-1.5 tons and excessive
weight prevented the Proton-M rocket from putting the satellites into
calculated orbit,' the official said.
He added that the company's management had not carried out all the
necessary pre-launch safety procedures and had failed to spot the
mistake in calculations."
http://news.yahoo.com/s/afp/20101217/sc_afp/russiaspacetechnology_20101217170038
"The costly launch failure that caused Russia to delay the deployment
of its own satellite system was the result of a fuel miscalculation, a
commission charged with probing the accident said Friday.
. . . Space officials said the calculation mistake was easy to
correct, and that they were relieved that there was nothing wrong with
the actual rocket itself.
'We have no questions regarding the Proton,' investigating commission
chief Gennady Raikunov told the Interfax news agency. 'Its launches
could be resumed.'
Raikunov said the fault lay with the Energia Rocket And Space
Corporation, which designed the carrier.
He said that the company failed to account for the fact that the
updated version of the rocket had bigger fuel tanks, which weighed
more when filled to the top.
'This increased the payload weight and the rocket did not have the
energy to deliver the satellites to orbit,' the space official said."
Corporate web site:
http://www.energia.ru/english/index.html
On 10-12-17 16:28 , Ed M. wrote:
Very unusual for the Russians.
They historically are very successful in very accurate orbit insertions.
OTOH, if you put all your eggs (3 in this case) in one basket, the cost
of failure is very high. Black Swans lurk everywhere.
--
gmail originated posts filtered due to spam.
Very unusual for the Russians.
They historically are very successful in very accurate orbit insertions.
OTOH, if you put all your eggs (3 in this case) in one basket, the cost
of failure is very high. Black Swans lurk everywhere.
--
gmail originated posts filtered due to spam.
> "The recent loss of three Glonass-M satellites in space was the result
> of a series of mistakes made by the Russian Energia rocket
> corporation, the head of the Russian state commission probing the
> incident said on Friday.
> 'The preliminary results of the investigation commission indicate that
> Energia miscalculated how much fuel needed to be loaded into the DM-3
> rocket booster,' said investigation commission head Gennady Raikunov,
> who also leads the Central Scientific Research Institute of Machine
> Building.
> 'The amount of oxidant exceeded the norm by 1-1.5 tons and excessive
> weight prevented the Proton-M rocket from putting the satellites into
> calculated orbit,' the official said.
> He added that the company's management had not carried out all the
> necessary pre-launch safety procedures and had failed to spot the
> mistake in calculations."