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  [Discuss] NASA's Space Launch System development (Page 3)

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Author Topic:   [Discuss] NASA's Space Launch System development
Robert Pearlman
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From: Houston, TX
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posted 12-12-2011 05:43 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Blackarrow:
Sorry, I don't buy the "it's money" or "budget" arguments.
The pace at which the rockets are built and the rate at which they are flown are not entirely dependent on each other, but whether you buy it or not, money dictates both.

Given the constrained funding available, NASA was asked to develop a flight plan that could realistically fit within that budget. Not building the Space Launch System and going a different direction was not an option (it was mandated by law) so the schedule as released prevailed.

If, after the program is underway, Congress and the President wants to accelerate or increase the flight rate, they will need to allocate more money.

Blackarrow
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From: Belfast, United Kingdom
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posted 12-13-2011 06:20 PM     Click Here to See the Profile for Blackarrow     Edit/Delete Message   Reply w/Quote
Robert, I don't disagree with you about the cost issue, I'm simply pointing out that it is absurd to develop something that you use once, then forget about for four years. I stand by my previous comments.

Fra Mauro
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From: Bethpage, N.Y.
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posted 07-30-2012 12:22 PM     Click Here to See the Profile for Fra Mauro   Click Here to Email Fra Mauro     Edit/Delete Message   Reply w/Quote
I wonder what the flight schedule is like after 2021 assuming the funding is still there and there are no technical issues.

Fra Mauro
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posted 09-12-2012 11:59 AM     Click Here to See the Profile for Fra Mauro   Click Here to Email Fra Mauro     Edit/Delete Message   Reply w/Quote
Would it makes sense to scrap the SLS and use the Atlas/Falcon vehicles from the VAB, but using the money to accelerate the flight schedule or build a lander?

Blackarrow
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From: Belfast, United Kingdom
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posted 09-12-2012 05:22 PM     Click Here to See the Profile for Blackarrow     Edit/Delete Message   Reply w/Quote
To go beyond low Earth orbit in any meaningful way, you need a heavy-lift rocket.

DavidH
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From: Huntsville, AL, USA
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posted 03-06-2013 12:09 PM     Click Here to See the Profile for DavidH   Click Here to Email DavidH     Edit/Delete Message   Reply w/Quote
For those that may have missed it:

F-1 Engine Gas Generators Test-Fired In Support of SLS

------------------
Homesteading Space | davidhitt.net

Robert Pearlman
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posted 03-06-2013 12:10 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Also see the dedicated thread: Blast from the past: NASA fires F-1 engine parts

Robert Pearlman
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posted 09-05-2013 04:55 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Composites World has an in depth article about the Janicki Industries' work to develop the payload fairing for the Space Launch System.
The Space Launch System (SLS) will be the next heavy-lift launch vehicle for the National Aeronautics and Space Admin. (NASA, Washington D.C.). Composites have been chosen for both the launch vehicle structures and tooling because they offer performance and cost advantages over metals.

As part of a three-year program to develop and demonstrate composite tooling and fabrication technology, Janicki Industries (Sedro-Woolley, Wash.) began working with NASA in 2010 to design tooling for a 1/6th-arc SLS fairing segment. Each segment measures 8.5m by 5.5m (28 ft by 18 ft), and six of them will be assembled to form the barrel section of the payload fairing for the SLS launch vehicle. NASA's objective was to demonstrate that cost-effective production of a lightweight composite structure is possible. "Our capabilities lined up well with NASA's goals in this program," explains Matt Robson, project manager at Janicki, "including out-of-autoclave processing, fabrication of large-scale tooling and pioneering of new processes to meet unique project demands."

(Thanks to Gary Milgrom for sharing the article.)

Fra Mauro
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posted 01-24-2014 08:56 AM     Click Here to See the Profile for Fra Mauro   Click Here to Email Fra Mauro     Edit/Delete Message   Reply w/Quote
I've read where NASA has been witholding back some funds from Orion and the SLS to cover termination costs in case the programs are terminated. Doesn't sound like they're too confident of the programs making it.

Robert Pearlman
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posted 01-24-2014 09:17 AM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Termination liability has little to do with confidence in a program's success but is rather a standard clause in federal contracts based on the estimated value of contractor work that would be required to close out a contract in in the unlikely case that it is terminated.

Recently, the House of Representatives took up a bill that would free up termination liability funds from the SLS and Orion (and the International Space Station) programs by requiring NASA to seek additional appropriations to cover such costs in the case of a contract cancellation (essentially making it impossible for NASA to cancel a contract without first seeking Congressional approval).

JBoe
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posted 02-09-2014 07:52 AM     Click Here to See the Profile for JBoe   Click Here to Email JBoe     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by spacefan JC:
...the Liberty Launch Vehicle, a five segment SRB first stage, and the Ariane cryogenic as the second stage.
I know the SLS will use the five segment SRB, will it have the same recovery systems that it will allow it to be reused? Is there a specific number of times the SRB will be reused before a new one will be mated to the SLS?

Robert Pearlman
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posted 02-09-2014 09:32 AM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
During the shuttle program, solid rocket boosters were not reused as single units. After being recovered post-flight, they were divided into their component casings. Different segments then flew again on different flights.

At last update, NASA does not plan to recover the boosters used with the Space Launch System as a cost saving measure.

(The agency relinquished ownership of the SRB recovery ships to the Department of Transportation in 2012.)

JBoe
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posted 02-09-2014 12:08 PM     Click Here to See the Profile for JBoe   Click Here to Email JBoe     Edit/Delete Message   Reply w/Quote
I never knew that they mixed and matched different segments with different flights.

Robert Pearlman
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posted 08-27-2014 02:18 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
NASA today (Aug. 27) announced that its engineers and managers have completed Key Decision Point-C, a rigorous review of the Space Launch System (SLS).
[Key Decision Point-C] provides a development cost baseline for the 70-metric ton version of the SLS of $7.021 billion from February 2014 through the first launch and a launch readiness schedule based on an initial SLS flight no later than November 2018.
That "no later than" date is about a year beyond the previous target date.
"We will keep the teams working toward a more ambitious readiness date, but will be ready no later than November 2018," said William Gerstenmaier, associate administrator for the Human Explorations and Operations Mission Directorate at NASA Headquarters in Washington.

Headshot
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posted 09-11-2014 04:15 PM     Click Here to See the Profile for Headshot   Click Here to Email Headshot     Edit/Delete Message   Reply w/Quote
Does anyone know if NASA plans to construct a non-flight version of the SLS to test fit and alignment of the various refurbished/new facilities in both the VAB and at the launch pad? This would be the SLS equivalent of the Apollo/Saturn 500F test article.

Robert Pearlman
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posted 09-11-2014 04:22 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
I asked about this, and there are no plans for a 500-F type demonstrator.

The closest the SLS program will come are qualification tanks for the core, but no complete vehicle will be stacked until Exploration Mission-1 (EM-1).

E2M Lem Man
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posted 09-11-2014 09:20 PM     Click Here to See the Profile for E2M Lem Man   Click Here to Email E2M Lem Man     Edit/Delete Message   Reply w/Quote
This vehicle is the best vehicle that NASA was mandated to build. As long as the current administration proceeds along this road to the asteroids and Mars it needs a booster.

There were similar calls about the Moon and the Saturn V. As to vehicle numbers: The original number of Saturn V ordered/manifested was ten and we did the landing in five. This left us with extras for exploration.

Finally its about time we applaud and encourage the NASA SLS team for producing this vehicle with such narrow funding. They deserve a well done!

cspg
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posted 09-12-2014 04:22 PM     Click Here to See the Profile for cspg   Click Here to Email cspg     Edit/Delete Message   Reply w/Quote
Any plans to give that rocket a name other than SLS?

Robert Pearlman
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posted 09-12-2014 04:35 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Yes, there are plans, but they are not yet well-defined.

Blackarrow
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posted 09-13-2014 09:34 AM     Click Here to See the Profile for Blackarrow     Edit/Delete Message   Reply w/Quote
I again offer "Prometheus." Only four syllables, unlike the clunky six-syllable "Apollo Eleven."

cspg
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posted 09-13-2014 03:37 PM     Click Here to See the Profile for cspg   Click Here to Email cspg     Edit/Delete Message   Reply w/Quote
Sounds too much more like a spaceship than a rocket and refers to a not so brilliant and recent movie...

Blackarrow
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posted 09-14-2014 03:42 PM     Click Here to See the Profile for Blackarrow     Edit/Delete Message   Reply w/Quote
I first proposed "Prometheus" before I had ever heard of the film of the same name (which I actually enjoyed very much!)


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