Author Topic: Stratolaunch: General Company and Development Updates and Discussions  (Read 1052277 times)

Online Chris Bergin

New feature article via the new L2 content noted recently in this thread.

http://www.nasaspaceflight.com/2013/05/stratolaunch-orbital-air-launch/

Dedicated thread (please use the new thread, given this one is 79 pages long):
http://forum.nasaspaceflight.com/index.php?topic=32001.0
« Last Edit: 05/24/2013 02:40 pm by Chris Bergin »
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Offline Zond

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Some history:
Quote
A Design Build project that started with discussions between Wallace & Smith and Scaled Composites in 2006. The first phase was the design of the site and two structures, The Fabrication Building and the T Hangar & Office. The actual Design of these two buildings began in the Fall of 2008 and continued through the Summer of 2009 when the funding for the project was pulled. In June of 2011 Scaled Composites approached W&S, by December of 2011 W&S was in contract and began earthwork for the Project.[/url]
http://www.wallacesmith.com/project-categories/aviationaerospace/

Offline Davinator

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New feature article via the new L2 content noted recently in this thread.

http://www.nasaspaceflight.com/2013/05/stratolaunch-orbital-air-launch/

Dedicated thread (please use the new thread, given this one is 79 pages long):
http://forum.nasaspaceflight.com/index.php?topic=32001.0

I assume you're going to write a second story, as there's a lot more source material in L2?

Offline FutureSpaceTourist

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Paul Allen's company Vulcan has now made public a new Stratolaunch animation with Orbital's LV:


Online yg1968

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An update:
http://www.washingtonpost.com/national/health-science/with-the-shuttle-done-a-co-founder-of-microsoft-sees-an-opening-in-space/2013/07/29/13175a0a-dce2-11e2-85de-c03ca84cb4ef_story_1.html

Quote
As for the rocket, the first stage, which is to be reusable, drops into the ocean; the second burns up in the atmosphere; the third puts the satellite into orbit, and eventually that third stage, too, burns up in the atmosphere.[...]

Wentz said the Kennedy Space Center’s Shuttle Landing Facility is the leading candidate, in part because infrastructure for both solid and liquid fuel is already in place. Planners are also looking at the Vandenberg and Edwards air force bases in California and at NASA’s Wallops Island Flight Facility in Virginia.
« Last Edit: 08/02/2013 04:29 am by yg1968 »

Offline edkyle99

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ATK officially announces its involvement.  Graphite composite case solid motors filled with "advanced propellants".

http://atk.mediaroom.com/2013-08-13-ATK-Awarded-Contract-by-Orbital-Sciences-to-Support-Stratolaunch-System

 - Ed Kyle

Online Chris Bergin

Yeah, writing that up.
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Offline HappyMartian

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Yeah, writing that up.


Chris, what will the propellant be? Clean and Green?
"The Moon is the most accessible destination for realizing commercial, exploration and scientific objectives beyond low Earth orbit." - LEAG

Offline JohnFornaro

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Starting to sound a bit better idea for some cargo launches.
Sometimes I just flat out don't get it.

Online Chris Bergin

And that's done...
http://www.nasaspaceflight.com/2013/08/orbital-atk-solid-partnership-stratolaunch-alv/

I'll start a new thread later, as this one's very long.
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Offline Lee Jay

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That's a nice update article, Chris.

Offline HappyMartian

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That's a nice update article, Chris.


Yep! I'll second that! It is good news!

I wonder about the "advanced propellants"...
"The Moon is the most accessible destination for realizing commercial, exploration and scientific objectives beyond low Earth orbit." - LEAG

Offline Rocket Science

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Great update Chris! :) It would be quite a sight seeing it take off from the SLF. I like the "mysterious looking green-goop" photo... ;D
"The laws of physics are unforgiving"
~Rob: Physics instructor, Aviator

Offline Hauerg

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I think tis would be a nice system to have due to its flexibility re orbits, fly away from bad weather etc.
What bothers me is that it is using TWO RL-10. IIRC the price per engine is 38mio. So 3rd stage engines alone cost more than a (not reused) F9.
Must be an interesting business case calculation.

Offline spectre9

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That 38m RL-10 price tag is the most oft repeated untruth on this site.

Offline Proponent

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Notice first the much different aspect ratio.  The Stratolaunch rocket is fatter and shorter, relatively speaking.  Pegasus ended up looking like it did in part because it was modeled after the X-15 that had previously been drop launched from the B-52, and in part because the Orion 50 motors were derived from an already developed land launch missile.

Next notice that the first stage is at least twice as long, and maybe longer, than the second stage.

It looks as though neither solid segmented is segmented.  Is that the case?

Offline Proponent

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Does confirmation of RL-10s in the third stage mean that hydrogen is the fuel (my guess), or is there a possibility of a methane version of the RL-10?

Offline Proponent

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Paul Allen's company Vulcan has now made public a new Stratolaunch animation with Orbital's LV:

Thanks for the video link.

The video mentions a mission range of 1000 nautical miles.  Since CCAFS is more than 1000 nmi. from the equator, "any orbit" is possible only if there's another base within about 17o of latitude of the equator.

In practice, is there any need at all for low-altitude satellites at inclinations less than 28o?
« Last Edit: 08/14/2013 12:03 pm by Proponent »

Offline baldusi

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Paul Allen's company Vulcan has now made public a new Stratolaunch animation with Orbital's LV:

Thanks for the video link.

The video mentions a mission range of 1000 nautical miles.  Since CCAFS is more than 1000 nmi. from the equator, "any orbit" is possible only if there's another base within about 17o of latitude of the equator.

In practice, is there any need at all for low-altitude satellites at inclinations less than 28o?
Depends on applications. For example, some LEO fleet use equatorial MEO and LEO. Some instruments have gone close to the equator (IRIX, I think, but I'm not sure).
And if you ever were to do human crew, the closer to the equator you are the farther from the Van Allen belt and thus the lower the radiation exposure. You could go higher, which would reduce the drag losses and still have low radiation dose. Not to mention that if you were exactly on the Equator orbit and you could launch from the equator, your launch opportunities would be something like hourly!
« Last Edit: 08/14/2013 12:54 pm by baldusi »

Offline Lars_J

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That 38m RL-10 price tag is the most oft repeated untruth on this site.

If you know it is "untruth", you should be able to give us a better number.

 

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