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  #1  
Old 09-18-2022, 10:09 AM
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Winston2021 Winston2021 is offline
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Default Miscellaneous Space Stuff

3D printed aerospike rotating detonation rocket engine test starting at 1:48.

Game Changing Development Program 2022 Highlights
NASA Langley Research Center

https://www.youtube.com/watch?v=bqFZb3wgq8Y

Ariane 6: Launchpad testing

https://www.youtube.com/watch?v=exWzdhMn4Os

The DAVINCI Mission to Venus

https://www.youtube.com/watch?v=ETm-hildOo4

Kennedy Space Center Tour - Sep 2022

https://www.youtube.com/watch?v=D8zT3LcLBDw

Museum Saturn I H-1 First Stage Rocket Engine - the combustion chamber of the engine on display was damaged during a test when the main LOX valve stuck open at engine shutdown - not externally visible - that's the reason it's on museum display - it was no longer useable. 8-13-63 date seen on tape on what looks like a turbopump.

https://www.youtube.com/watch?v=K2OsDhvHm8g

Excellent, highly technical video linked below. Shows film of combustion chamber instability test where a small bomb was detonated within the combustion chamber.

"To demonstrate the dynamic stability of the combustion process of the H-1 engine, as shown here in high speed photography, a fifty grain bomb was detonated in a baffle compartment of the injector to induce combustion instability. Stable combustion was reestablished within twenty milliseconds of bomb detonation."

Also shown is post-firing inspections of the BEAUTIFUL machined parts.

NASA H-1 Engine Film Report 1965

https://www.youtube.com/watch?v=z4dOJGY5a7I

Saturn 1 (SA-5) Camera Inside Kerosene Tank

https://www.youtube.com/watch?v=fL-Oi9m2beA

Saturn 1B AS-203 S-IVB Hydrogen Tank Interior

https://www.youtube.com/watch?v=mJzT2bBGVfo

I always wonder what happened to the incredible scale models often seen in these films. A huge one is shown starting at 11:34 in this video.

First Ten Lives of Saturn I

https://www.youtube.com/watch?v=Z-OhfVNbtqk

Check out the ones in Werner's office:

https://i.redd.it/vcqznxfyxce21.jpg
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  #2  
Old 09-18-2022, 05:08 PM
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The aerospike was cool. The end of the last video shows footage of S-IV separation and ignition. It was cool seeing each RL-10 ignite. I've seen it a few times before, but very seldom. We see the S-IVB footage all the time so it was a welcome change.
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Old 09-20-2022, 08:38 AM
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The Most Metal of Rockets // Delta IV Heavy

https://www.youtube.com/watch?v=C4mjzfOeLNQ

Jun 13, 2022
SpaceX vs. NASA: Cost
SpaceX is 10X cheaper with 30X lower cost overrun than NASA in lifting payload into space. Why? Because SpaceX is platform-based, NASA not.

https://medium.com/geekculture/spac...st-4fae454823ac

We observe:

- In terms of frequency of cost overrun: Of the 181 NASA missions in our refence class, we had cost overrun data for 118 missions: 9 in 10 suffered a cost overrun. For SpaceX, the comparable number is 5 in 10, which is exactly what a good portfolio manager would aim for.

- In terms of magnitude of cost overrun: NASA’s actual costs were on average +90.0% higher than estimated costs with a median of +45.8% indicating that the distribution of cost overrun has a heavy skew to the right (i.e., going over budget). A Mann-Whitney U test of overall cost neutrality provided conclusive evidence that NASA’s budgets were systematically biased towards underestimation (p = 0.004). Thus, there is a strong bias towards adverse outcomes with NASA, as shown in Figure 2a. For SpaceX the comparable numbers are an average cost overrun of +1.1% and a median of +1.5%, indicating little skew, and in the opposite direction. Unlike NASA, SpaceX cost under/overruns are tightly distributed around a mean forecasting error that approximates zero.

- Finally, we tested whether the NASA distribution of cost overruns is different form the SpaceX distributions. Using a Wilcoxon test (p<0.0001), we found overwhelming evidence that SpaceX outperform NASA. SpaceX distribution of cost overruns is far more attractive (lower average than median, much fewer extreme values) than the NASA distribution.
In sum, SpaceX is 10X cheaper with 30X lower cost overrun than NASA in lifting payload into space.

For the full version of this text, with references, see Atif Ansar and Bent Flyvbjerg, 2022, “How to Solve Big Problems: Bespoke Versus Platform Strategies,” Oxford Review of Economic Policy, vol. 38, no. 2, pp. 338–368.

Figures and tables:

https://miro.medium.com/max/1050/1*...lKFsWR9hhHw.png

https://miro.medium.com/max/770/1*9...k0JtTjemcpw.png

https://miro.medium.com/max/770/1*-...CqOiL2k67Lw.png

Following SpaceX down the rabbit hole
April 18, 2011


https://www.thespacereview.com/article/1826/1

First, the uncomfortable questions. Given the fact that the SpaceX Falcon rockets are not based on any radical technological breakthrough that lowered their costs, one has to ask just how bad a deal has the taxpayer been getting from the Atlas V and Delta IV, products of the legacy aerospace establishment? Soon to be deprived of the hyper-expensive Space Shuttle as their own point of comparison, the answer would appear to be much worse than we ever imagined.

Hear Meteoroid Striking Mars, Captured by NASA’s InSight Lander

https://www.youtube.com/watch?v=SA90WKuukmM

Arianespace unveils 'Susie' - Reusable spacecraft for crew and cargo missions

The Smart Upper Stage for Innovative Exploration (Susie) is a reusable spacecraft that can "function as an automated freighter and carry out crewed mission," according to Arianespace. It has been designed to launch on an Ariane 6 rocket and future Ariane 64 variant.

https://www.youtube.com/watch?v=7oFgGXlHi8Q

https://forum.nasaspaceflight.com/i...p?topic=57201.0
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  #4  
Old 09-20-2022, 06:05 PM
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I don't need no stinkin Wilcoxon tests to know that NASA has royally screwed the taxpayer for decades, while SpaceX has kicked a$$ and taken names with their development and implementation of hardware.
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  #5  
Old 09-20-2022, 06:30 PM
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Quote:
Originally Posted by tbzep
I don't need no stinkin Wilcoxon tests to know that NASA has royally screwed the taxpayer for decades, while SpaceX has kicked a$$ and taken names with their development and implementation of hardware.


Oooh! Sounds like you are channeling GH there!

Earl
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  #6  
Old 09-21-2022, 11:41 AM
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Quote:
Originally Posted by Earl
Oooh! Sounds like you are channeling GH there!

Earl

Scary moment there. I need to relax more.
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  #7  
Old 09-21-2022, 02:18 PM
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Quote:
Originally Posted by tbzep
Scary moment there. I need to relax more.



I have my occasional “GH” moments.

You’ll be fine.
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  #8  
Old 09-25-2022, 07:28 AM
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More on Vulcan Centaur manufacturing and testing. Video is cued to that part.

https://youtu.be/L1giJrmgMAQ?t=2100

Vulcan Centaur

https://en.wikipedia.org/wiki/Vulcan_Centaur

As of October 2018, the U.S. government had committed approximately US$1.2 billion in a public–private partnership to Vulcan Centaur development and future funding was dependent on ULA securing an NSSL contract.

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Loads of beautiful stills, assemby and test videos in both of these videos, but especially the first one which was my favorite because of its single subject, Mars Pathfinder, a favorite mission of mine.

JPL and the Space Age: The Pathfinders
NASA Jet Propulsion Laboratory

https://www.youtube.com/watch?v=1rVH0YlcKyY

JPL and the Space Age: The Breaking Point
NASA Jet Propulsion Laboratory


The Jet Propulsion Laboratory’s success in landing the low-cost Mars Pathfinder mission in 1997 was viewed as proof that spacecraft could be built more often and for far less money — a radical cultural change NASA termed “Faster, Better, Cheaper.”

This era also coincided with the discovery of a Mars rock that hinted at the possibility of microbial life elsewhere in the solar system. NASA’s reaction was to envision a steady stream of missions to Mars — all done at cut-rate costs. In fact, the next challenge taken on by JPL was to fly two missions to Mars for the price of the single Pathfinder mission. Mars Climate Orbiter and the Mars Polar Lander both made it to the launch pad, on time and on budget, but were lost upon arrival at Mars, resulting in one of the most difficult periods in the history of JPL.

“The Breaking Point” tells the story of the demise of these two missions and the abrupt end of NASA’s “Faster, Better, Cheaper” era.

https://www.youtube.com/watch?v=kuYDkVRyMkg

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Behind the Spacecraft: NASA's DART, the Double Asteroid Redirection Test
Oct 24, 2021

https://www.youtube.com/watch?v=g7zdeQ-Uw8k

Media Briefing: Preview of DART Mission's Impact with Asteroid Dimorphos on Monday, 26 Sep @ 7:14pm Eastern Time (2314 GMT)
22 Sep 2022

https://www.youtube.com/watch?v=1ePqmsjan9s

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SpaceX's engine testing facility in McGregor, TX

https://www.youtube.com/watch?v=-fkdMf6WerM

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Who Owns Space Debris?

https://www.youtube.com/watch?v=8LXpJQgev1w

---------

Insane Engineering Of The Saturn F-1 Engine

https://www.youtube.com/watch?v=Z37MdvcSaFY

F-1 Engine Ocean Recovery

https://www.youtube.com/watch?v=mUqp0ppKxJ8

https://www.youtube.com/watch?v=jmzhgWXr0jQ

---------

STS-51F (Challenger) ABORT TO ORBIT

https://www.youtube.com/watch?v=9Luwm_gjLCs
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Last edited by Winston2021 : 09-25-2022 at 07:52 AM.
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  #9  
Old 09-25-2022, 09:58 AM
frognbuff frognbuff is offline
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I love how Wikipedia reports about a Vulcan Centaur Heavy. Yes - somebody built a model of such a concept and Tory took a picture with it, but there are literally no plans to make one at this time.
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  #10  
Old 09-30-2022, 11:23 AM
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Winston2021 Winston2021 is offline
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29 Sep 2022
New BE-4 Full Duration Hot Fire, Update, & More

https://www.youtube.com/watch?v=QJsAx12Vbd8

Just the test, full duration:

https://twitter.com/torybruno/statu...231771913994240

---------

This Mini Space Shuttle Will Deliver Military Cargo Anywhere on Earth in Less Than 3 Hours
A partnership between the Pentagon and Sierra Space could build the foundation of military space transport for decades to come.
29 Sep 2022


https://www.popularmechanics.com/mi...-space-shuttle/

The Pentagon has signed an agreement with Sierra Space, developer of the Dream Chaser shuttle, to develop the glide-like spacecraft for military transport missions. The goal is to develop a craft that can transport people or cargo anywhere on Earth—or to some locations in space—within three hours. While the Dream Chaser is limited in how much cargo it can transport, the procedures and tactics the two parties work out will likely become the foundation of military space transport for decades to come.

NASA’s newest cargo spacecraft began life as a Soviet space plane
18 Jan 2016


https://arstechnica.com/science/201...et-space-plane/

The Return of the Space Planes
Mar 22, 2021


https://www.youtube.com/watch?v=w1-QZ35sb4Q

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Time lapse mirror coating chemical stripping and re-coat process starts at 3:54.

The Advanced Electro-Optical System (AEOS) Telescope Receives a Recoat
AF Research Lab
Sep 26, 2022


https://www.youtube.com/watch?v=fOZ_59pVLiI

Spying on adversary satellites:

3.67 m Advanced Electro Optical System Telescope

https://en.wikipedia.org/wiki/3.67_...ystem_Telescope

The 3.67 m Advanced Electro Optical System Telescope is a Department of Defense telescope at Haleakala Observatory. The telescope is part of the Maui Space Surveillance Complex (MSSC), which in turn is part of the Air Force Maui Optical and Supercomputing Site (AMOS).

The 3.67-meter telescope, known as the Advanced Electro-Optical System (AEOS), owned by the Department of Defense, is the United States' largest optical telescope designed for tracking satellites. The 75-ton AEOS telescope points and tracks very accurately, yet is fast enough to track both low-Earth satellites and ballistic missiles. It can slew at nearly 20 degrees per second. It is an f/200 and has an extremely narrow field of view. AEOS can be used simultaneously by many groups or institutions because its light can be channeled through a series of mirrors to seven independent coudé rooms below the telescope. Employing sophisticated sensors that include an adaptive optics system, radiometer, spectrograph, and long-wave infrared imager, the telescope tracks man-made objects in deep space and performs space object identification data collection.

AEOS is equipped with an adaptive optics system, the heart of which is a 941-actuator deformable mirror that can change its shape to remove the atmosphere's distorting effects. Scientists are expected to get near diffraction-limited images of space objects.


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Rotating Detonation Rocket Engine

https://www.youtube.com/watch?v=fRMMSyCcTDI

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Uptime 15,364 days - The Computers of Voyager
14 Sep 2019


https://www.youtube.com/watch?v=H62hZJVqs2o

Incredible:

How To Contact The Voyager 2 Probe (PART 1) - from 2017

https://www.youtube.com/watch?v=FzRP1qdwPKw

Pinging The Voyager 2 Probe (PART 2)

https://www.youtube.com/watch?v=1rCrfQUcXDI

Voyagers overview:

https://www.youtube.com/watch?v=LvS0gUlzS-4

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See Mars Helicopter Ingenuity soar for 33rd and 32nd time in timelapses

https://www.youtube.com/watch?v=73y5Maf_8h0

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Eyes on Asteroids

https://eyes.nasa.gov/apps/asteroids/#/asteroids

Planetary Defense

https://www.nasa.gov/planetarydefense

---------

Loads of beautiful stills, assemby and test videos in both of these videos, but especially the first one which was my favorite because of its single subject, Mars Pathfinder, a favorite mission of mine.

JPL and the Space Age: The Pathfinders
NASA Jet Propulsion Laboratory

https://www.youtube.com/watch?v=1rVH0YlcKyY

JPL and the Space Age: The Breaking Point
NASA Jet Propulsion Laboratory


The Jet Propulsion Laboratory’s success in landing the low-cost Mars Pathfinder mission in 1997 was viewed as proof that spacecraft could be built more often and for far less money — a radical cultural change NASA termed “Faster, Better, Cheaper.”

This era also coincided with the discovery of a Mars rock that hinted at the possibility of microbial life elsewhere in the solar system. NASA’s reaction was to envision a steady stream of missions to Mars — all done at cut-rate costs. In fact, the next challenge taken on by JPL was to fly two missions to Mars for the price of the single Pathfinder mission. Mars Climate Orbiter and the Mars Polar Lander both made it to the launch pad, on time and on budget, but were lost upon arrival at Mars, resulting in one of the most difficult periods in the history of JPL.

“The Breaking Point” tells the story of the demise of these two missions and the abrupt end of NASA’s “Faster, Better, Cheaper” era.


https://www.youtube.com/watch?v=kuYDkVRyMkg

---------

STS-51F (Challenger) ABORT TO ORBIT as it happened

https://www.youtube.com/watch?v=9Luwm_gjLCs

---------

ArianeGroup's vision for current and future Ariane 6 launcher evolutions
20 Sep 2022


https://www.youtube.com/watch?v=95O3yfqhpZg

---------

My question to his last comments would be, "Why?" I know servicing on the pad is impossible because $5.7 billion dollars for infrastructure upgrades wasn't enough to build a proper pad servicing structure. But why is the changing of the batteries so physically difficult and complex?

NASA to assess SLS work and next launch opportunities after rollback
September 27, 2022


https://spacenews.com/nasa-to-asses...after-rollback/

The core stage FTS batteries are located in the intertank section between the rocket’s liquid hydrogen and liquid oxygen stages, and can only be accessed while in the VAB.

“Getting into some of these volumes is difficult,” said Jim Free, NASA associate administrator for exploration systems development, in a Sept. 27 call with reporters. “The FTS changeout is not simple.”


The Cost of SLS and Orion

https://www.planetary.org/space-pol...f-sls-and-orion

From its inception in 2011 through the year of its first flight, the Space Launch System rocket program has cost $23.8 billion. The Orion deep space capsule has cost $20.4 billion since the program began in 2006. Related ground infrastructure upgrades cost an additional $5.7 billion since 2012. In total, NASA spent $49.9 billion on these programs between 2006 and their first test launch in 2022.

Why we have the SLS

The SLS rests on a secure foundation of political support, a consequence of the U.S. framework of representative democracy and discretionary funding.
(BS... we have this white elephant because a few powerful Senators wanted a Shuttle jobs continuation program that benefited their political future far more than they wanted to best spend the limited space exploration funds of the entire nation...)

---------

And since a "billion dollars" is just thrown around so much these days, here's an infographic to give an idea of how much that actually is. Since these figures are for $100 bills, multiply the figures by 100 for $1 bills:

https://www.thecalculatorsite.com/i...s-in-stacks.jpg
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Last edited by Winston2021 : 09-30-2022 at 03:06 PM.
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