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#20
by
Jim
on 03 Dec, 2009 11:35
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Yes, the part that attaches the interstage to the upper part of the CBC is different. Also there is an X-brace inside the CBC which I assume connects all the SRM attach points for added strength. There are probably other changes as well.
Neither Delta nor Atlas have x-bracing on the inside. The differences are the additional attach points. The strengthening is done on the tank skin and
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#21
by
lbiderman
on 03 Dec, 2009 11:53
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Yes, the part that attaches the interstage to the upper part of the CBC is different. Also there is an X-brace inside the CBC which I assume connects all the SRM attach points for added strength. There are probably other changes as well.
Neither Delta nor Atlas have x-bracing on the inside. The differences are the additional attach points. The strengthening is done on the tank skin and
Mmmm, it seems that Jim was saying something he shouldn´t have and somebody cut him off..
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#22
by
Downix
on 03 Dec, 2009 12:29
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Yes, the part that attaches the interstage to the upper part of the CBC is different. Also there is an X-brace inside the CBC which I assume connects all the SRM attach points for added strength. There are probably other changes as well.
Neither Delta nor Atlas have x-bracing on the inside. The differences are the additional attach points. The strengthening is done on the tank skin and
Mmmm, it seems that Jim was saying something he shouldn´t have and somebody cut him off..
..... and in the news, a series of black helicoptors appeared mysteriously around Titusville...
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#23
by
kevin-rf
on 03 Dec, 2009 13:15
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Don't need a helicopter, just one man in black putting his finger on the power button
I wonder if he was copy and pasting from one of his previous post and didn't get the quote... The conspiracy theories will abound, Hoagland now has something new to make up stories about
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#24
by
Art LeBrun
on 03 Dec, 2009 13:21
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Don't need a helicopter, just one man in black putting his finger on the power button
I wonder if he was copy and pasting from one of his previous post and didn't get the quote... The conspiracy theories will abound, Hoagland now has something new to make up stories about
At some point in time Hoagland might have to add the pen name R. C. Hogwash.
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#25
by
Chris Bergin
on 03 Dec, 2009 14:11
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Cape Canaveral AFS, Fla., (Dec. 3, 2009) - A United Launch Alliance Delta IV rocket with the Air Force’s Wideband Global SATCOM-3 (WGS-3) satellite sits poised on its Space Launch Complex-37 launch pad ready for flight. The WGS-3 mission is set to launch at 7:22 p.m. EST with its launch window stretching until 8:43 p.m. The WGS-3 mission is the third installment of the Wideband Global SATCOM (WGS) system. The WGS satellites are important elements of a new high-capacity satellite communications system providing enhanced communications capabilities to America’s troops in the field for the next decade and beyond. (Photo by Pat Corkery, United Launch Alliance)
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#26
by
Nick L.
on 03 Dec, 2009 14:51
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Yes, the part that attaches the interstage to the upper part of the CBC is different. Also there is an X-brace inside the CBC which I assume connects all the SRM attach points for added strength. There are probably other changes as well.
Neither Delta nor Atlas have x-bracing on the inside. The differences are the additional attach points. The strengthening is done on the tank skin and
From the USAF via a website that shall not be named:
"The five-meter, 47-foot-long composite payload fairing is a first flight item, as well as the four solid rocket motor configuration, two of which are thrust vector controlled, and two are fixed nozzle. For added support, we also use the X-brace within the Common Booster Core."
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#27
by
edkyle99
on 03 Dec, 2009 15:42
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ULA Mission Booklet
A Medium with a 5 meter "Heavy" upper stage. Am I remembering correctly that ULA intends to eventually phase out the 4 meter upper stage?
- Ed Kyle
I believe it was the no solid CBC that they were going to phase out
Would the "no solid" CBC be flown without solids for light payloads?
It makes sense to reduce configurations as much as possible. The two upper stage options seems to offer a likely candidate for future configuration rationalization, but it would mean giving up the lightest payload ranges for Delta. The common upper stage idea (Atlas and Delta) is probably the best path toward that goal, but, as always, needs $$$$$$.
- Ed Kyle
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#28
by
WHAP
on 03 Dec, 2009 15:54
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The two upper stage options seems to offer a likely candidate for future configuration rationalization, but it would mean giving up the lightest payload ranges for Delta.
Why do you give up the light payload ranges? Wouldn't you just have excess capacity? Maybe I don't understand the upper stage options to which you refer.
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#29
by
edkyle99
on 03 Dec, 2009 16:10
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The two upper stage options seems to offer a likely candidate for future configuration rationalization, but it would mean giving up the lightest payload ranges for Delta.
Why do you give up the light payload ranges? Wouldn't you just have excess capacity? Maybe I don't understand the upper stage options to which you refer.
The 5-meter upper stage weighs nearly 0.6 tonnes more empty than the 4-meter upper stage and can carry 7-ish tonnes more propellant. Part of that extra dry mass comes directly out of payload capability, part of it could be made up by burning the extra propellant carried, but the latter "make up" is limited by the smaller liftoff thrust to weight ratio of a Medium without solids, etc. The heavier/wider payload fairing and interstage also takes away payload capacity.
Basically, it would likely mean giving up the Medium-no-solids vehicle altogether, since it would only be Delta 2-class at best. A Medium 5,2 works (5-meter upper stage, 2 solids), but it carries about 1.5 tonnes less to LEO (and 1 tonne less to GTO) than a Medium 4,2, for example.
- Ed Kyle
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#30
by
Kasponaut
on 03 Dec, 2009 16:48
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Hello Ed.
I am following this launch also.
A question for you:
What is the plan with the Delta 4 upper stages?
I heard something about a new common upper stage for both the Delta 4 and the Atlas 5. Do you have any information about this upper stage dimensions - 4 vs 5 meters?
Kasper
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#31
by
edkyle99
on 03 Dec, 2009 16:52
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Hello Ed.
I am following this launch also.
A question for you:
What is the plan with the Delta 4 upper stages?
I heard something about a new common upper stage for both the Delta 4 and the Atlas 5. Do you have any information about this upper stage dimensions - 4 vs 5 meters?
Kasper
It is part of long term planning, proposed but not funded to my knowledge.
http://www.ulalaunch.com/docs/publications/UpperStageEvolutionJPC2009.pdf - Ed Kyle
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#32
by
Jim
on 03 Dec, 2009 16:53
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ULA Mission Booklet
A Medium with a 5 meter "Heavy" upper stage. Am I remembering correctly that ULA intends to eventually phase out the 4 meter upper stage?
- Ed Kyle
I believe it was the no solid CBC that they were going to phase out
Would the "no solid" CBC be flown without solids for light payloads?
With the RS-68A, there is no need for the "reduced weight" medium CBC. Only one CBC configuration is needed for Med, M+(4,2), M+(5,2),M+(5,4). The only difference being the interstage for 4 or 5 meter upperstages. The RS-68A offsets the heavier core allowing it to fly the same payloads without solids.
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#33
by
edkyle99
on 03 Dec, 2009 16:57
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Delta 346 on the pad live shots. Sunlight!
- Ed Kyle
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#34
by
Downix
on 03 Dec, 2009 17:13
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How visible will it be from the florida west coast do you think? My son wants to see, but I need to know if I need to book-it the two hours to KSC.
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#35
by
ChrisGebhardt
on 03 Dec, 2009 17:26
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How visible will it be from the florida west coast do you think? My son wants to see, but I need to know if I need to book-it the two hours to KSC.
If there are not numerous amounts of clouds, you should be able to see something. How much? I'm not sure. Just look to the east.
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#36
by
Downix
on 03 Dec, 2009 17:37
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How visible will it be from the florida west coast do you think? My son wants to see, but I need to know if I need to book-it the two hours to KSC.
If there are not numerous amounts of clouds, you should be able to see something. How much? I'm not sure. Just look to the east.
So, hop in the car and drive for an hour might not be a bad idea.
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#37
by
Kasponaut
on 03 Dec, 2009 17:59
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Hello Ed.
I am following this launch also.
A question for you:
What is the plan with the Delta 4 upper stages?
I heard something about a new common upper stage for both the Delta 4 and the Atlas 5. Do you have any information about this upper stage dimensions - 4 vs 5 meters?
Kasper
It is part of long term planning, proposed but not funded to my knowledge.
http://www.ulalaunch.com/docs/publications/UpperStageEvolutionJPC2009.pdf
- Ed Kyle
Thanks Ed!
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#38
by
kevin-rf
on 03 Dec, 2009 18:00
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Your son will love the road trip. If I was him I would be voting with the gas pedal
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#39
by
Chris Bergin
on 03 Dec, 2009 18:31
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Moved for live coverage. Preview article to be published shortly.
