Liquid Rocket Engines (J-2X, RS-25, general)
- Marshall Space Flight Center
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Here is the list of entries for Liquid Rocket Engines (J-2X, RS-25, general) based on the selected criteria.
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Liquid Engines Extra -- Introducing LEO
May 08, 2013 04:40:30 PM | William D. Greene
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- I am going to invite you into our little piece of office space and I will do so to tell you about how the office has recently evolved. Also, towards the end as a reward, I’ll give you an update of J-2X testing progress to date.
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J-2X Progress: Current Status, The End of 2012
Jan 08, 2013 11:00:13 AM | William D. Greene
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- It’s been awhile since I've written one of these articles. I could give you a big long list of all the really, really serious stuff that I've been doing instead, but that's just a bunch of feeble excuses. Instead, I'll just get down to business and give you a status report on the J-2X development effort.
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Inside The J-2X Doghouse: Beyond the Gas Generator Cycle
Aug 08, 2012 10:01:42 AM | William D. Greene
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- Okay, I admit it: I'm a sucker for the Olympics. I watch with rapt attention to sporting events that I would otherwise never consider viewing other than under the once-every-four-years heading of the Olympics. Why is that?
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J-2X Extra: Human-Rated Chili
Jun 27, 2012 09:34:58 AM | William D. Greene
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- I make a mean vegetarian chili, but you can be sure that it will be different every single time that I make it since it’s always from memory and my memory ain’t what it used to be. I wing it. And that’s fun. So, what does my free-form chili cooking this have to do with J-2X?
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J-2X Extra: What's in a Name?
Aug 08, 2012 10:07:48 AM | William D. Greene
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- It's been over six years since I started working on the J-2X development effort. Throughout that entire period, whenever I get the chance to talk to people outside of our small, internal rocket engine community (…for very understandable reasons, they don't let us out much), the single, most frequent, recurring, and ubiquitous question that I hear is something along the lines of this...
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J-2X Progress: Two Stands Occupied
Apr 24, 2012 02:12:49 PM | William D. Greene
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- It's been awhile since I've had the opportunity to update what we've been doing for the J-2X development test campaign. So, everyone is probably wondering where we stand.
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Welcome to the J-2X Doghouse: Old Dogs, New Tricks
Mar 27, 2012 07:50:37 AM | William D. Greene
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- Considering the many brilliant and knowledgeable people with whom I have the privilege of working here at NASA, I've come to accept the conclusion that there is a lot more stuff to know than can ever be learned.
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Welcome to the J-2X Doghouse: Twist and Shout...and Steering
Mar 05, 2012 05:11:05 PM | William D. Greene
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- Put a little kid into the driver's seat of a car and what's the first thing they do? They grab the steering wheel and twist. Twisting the steering wheel back and forth is just about the most intuitive, intrinsic sense of "driving" I can imagine. Now think of a launch vehicle blasting off the pad. Other than for some extreme, emergency conditions, there is nothing that stands in for the steering wheel on a launch vehicle during ascent. Without a steering wheel, per se, how does steering happen?
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J-2X Progress: The Next Phase for E10001
Feb 03, 2012 11:27:13 AM | William D. Greene
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- Things move on. The same is true for J-2X. Last year was momentous for our project but now things move on and the life of our good friend E10001 enters its next phase.
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J-2X Progress: A New Star on Our Horizon
Dec 12, 2011 11:10:13 AM | William D. Greene
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- For weeks and weeks (or months and months really), we've been going on and on about the star of our J-2X project, development engine E10001. So, E10001 is unquestionably a star. Beyond this, however, we have other potential stars waiting in the wings. I would liken this situation to "American Idol" except that I've never actually seen that show and, further, all of our test articles are not in competition with each other.
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J-2X Progress: Mission-Duration Test
Nov 18, 2011 03:27:35 PM | William D. Greene
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- Five hundred seconds is exactly eight minutes and twenty seconds. That seems like a really long time when you're counting every second.
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J-2X Extras: Here Comes the Bride -- Vehicle Integration
Nov 03, 2011 04:29:18 PM | William D. Greene
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- I just got back a few days ago after a long weekend in Philadelphia where my wife's niece got married. In the midst of all these festivities, an analogy came to mind regarding J-2X -- well okay, perhaps not truly in the midst of the festivities, but certainly as part of the next-day hangover.
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J-2X Progress: Engine 10001 Testing Status
Oct 12, 2011 11:38:33 AM | William D. Greene
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- When last I discussed with y'all the status of testing on the first J-2X development engine, I showed you a video of our first mainstage test. That was just over a month ago. So, what's been happening since then?
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J-2X Progress: The Burp Test
Jul 07, 2011 11:05:06 AM | William D. Greene
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- I give to you the J-2X Burp Test. No, that is of course not the official name. The official name is the "J-2X Ignition Test" or, even more formally: Test A2J001. That really rolls off the tongue doesn't it?
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J-2X Extra: The Rocket Engine Development Life Cycle
Jun 20, 2011 04:25:26 PM | William D. Greene
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- Everyone has in their personal histories certain events that they can look back on and say, "That's where things changed for me." Everyone has a history, a story. It is the narrative of how we come to be who we are. Believe it or not, rocket engines also have a life story of how they come to be.
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J-2X Progress: Road Trip, Baby!
Jun 13, 2011 10:52:29 AM | William D. Greene
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- It wasn't too many years ago that there was this thing about asking sports heroes after winning the big game, "So, what’s next?" They would always dutifully answer "I'm going to Disney World!" I guess that that whole thing is passé since I've not heard it in awhile, so I am going offer an alternative. Maybe it'll catch on and be the BIG THING this summer…
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J-2X Progress: Engine Assembly Complete
Jun 06, 2011 05:21:20 PM | William D. Greene
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- Just by chance, did you happen to see the title for this article? We’ve all been working a long time to get to hoot and howl a bit about this. Wahoo! We are now officially into the next phase for J-2X development engine E10001.
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J-2X Extra Rocket Alchemy: How Paper Becomes Precious Metal
May 10, 2011 02:51:06 PM | William D. Greene
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- Alchemy isn’t practiced much these days. That's a shame. But there is little doubt in my mind that alchemy is exactly what is going on behind the scenes, deep within the dungeons of NASA as we develop a rocket engine.
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J-2X Progress: Engine Assembly, Volume 4
Apr 19, 2011 03:54:41 PM | William D. Greene
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- It's been about three weeks since I last reported on the progress of J-2X Engine 10001 assembly. For the last few weeks the engineers and technicians have been diligently plugging away at smaller stuff, at the details. Details, details, details!
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J-2X Extra: Supplier Appreciation
Apr 11, 2011 05:12:11 PM | William D. Greene
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- Pssssssst. Come over here. Yes, you. Come on. Right here. Lean in real close because I’ve got a secret to share. A little closer. Are you ready? Okay, here it is...
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J-2X Progress: Engine Assembly, Volume 3
Mar 28, 2011 04:47:34 PM | William D. Greene
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- Assembly of J-2X development Engine 10001 “officially” commenced on Monday 21 February of this year, just about a month ago. Here is the engine today. Awwwww, our little baby is growing up so fast!
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J-2X Doghouse: The Rocket Equation! Wahoo!
Mar 21, 2011 10:34:04 AM | William D. Greene
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- In response to a couple of early requests on this blog, I’d like to talk about rocket engine performance characteristics and how they relate to successfully getting off the planet and into orbit. Because this comes down to a matter of equations – and therefore at least half of the reading audience will click on their Facebook icon as soon as they see any equations – let me start with an old joke...
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J-2X Extra: The Faces Behind J-2X, NASA MSFC, Part 2
Mar 08, 2011 03:19:58 PM | William D. Greene
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- There are literally hundreds of people behind the J-2X development effort and they span the country. Let me introduce you to much of the next tier of our motley - yet talented - management crew, namely the subsystem managers here on the NASA side.
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J-2X Extra: Shiny Metal Pieces
Feb 16, 2011 10:54:42 AM | William D. Greene
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- “Finally, it's been discovered! Rocket engineers CAN have a sense of humor! Oh, and they love shiny things...”
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J-2X Progress: Test Stands Moving Towards Readiness
Feb 11, 2011 09:57:04 AM | William D. Greene
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- In previous articles you've seen overview articles about Stennis and the test stands. For this article, I'm going to provide an update and show off some neato pictures of the ongoing work.
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J-2X Progress: Valves, Commands into Action
Jan 25, 2011 11:54:43 AM | William D. Greene
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- Everyone seems to like analogies between the composition of a rocket engine and that of the human body --and in some cases, they work pretty well!
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J-2X Extras: Rebuilding the Past
Dec 01, 2010 10:50:54 AM | William D. Greene
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- Why didn't NASA just dust off the old J-2 engine instead of launching into the J-2X development effort? There's a moral to that story...
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J-2X Progress: The J-2X Test Stands
Nov 22, 2010 10:48:57 AM | William D. Greene
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- Okay, so now you have a great big rocket engine. What are you going to do with it? Well, fire it, of course! But where are you going to do this...?
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