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Post by banjomd on Jun 30, 2010 15:09:49 GMT -4
...In order the balance the mass around the center of gravity... ?Centerline/thrustline? |
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Post by banjomd on Jun 30, 2010 11:02:28 GMT -4
Thanks, Jay. Very informative.  |
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Post by banjomd on Jun 30, 2010 8:59:10 GMT -4
Completely different engine design, (it had a throttle for a start, the first manned-flight rocket engine to do so IIRC) , and it used a different fuel/oxidiser mix. Wasn't the X-15's XLR99 engine the first throttlable man-rated rocket? Found a fact sheet: www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=890 |
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Post by banjomd on Jun 30, 2010 8:54:53 GMT -4
Great point, Raven! Now does anybody know if the LM DPS engine was ever tested for restarts? (I suppose if it failed they would've jettisoned the descent stage and used the ascent engine; but no throttle, then!) They used the Desent Engine multiple times, including a firing while attached to the CSM, on Apollo 9. Whoops; forgot 9! |
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Post by banjomd on Jun 29, 2010 22:35:47 GMT -4
Great point, Raven!
Now does anybody know if the LM DPS engine was ever tested for restarts? (I suppose if it failed they would've jettisoned the descent stage and used the ascent engine; but no throttle, then!)
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Post by banjomd on Jun 27, 2010 19:16:12 GMT -4
Who? Oh yeah...
He's forgotten already!
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Post by banjomd on Jun 24, 2010 6:04:50 GMT -4
Thanks, everyone. I re-read and want to clarify: The Grumman engineer meant that the flying APS engine was never tested, not the APS engine family as a whole. Now, does anyone have a link to S1 test firing video? ;D Nevermind... www.youtube.com/watch?v=iIuM_cI5yQs&feature=related  |
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Post by banjomd on Jun 23, 2010 11:41:05 GMT -4
I ask because a Grumman engineer says (in the "Moon Machines" DVD) that the LM ascent engine, because of the hypergolic propellants' corrosivity could not be tested and each one's MAIDEN RUN was from the lunar surface!
(Well, that holds true for the DPS engine but death would've been less likely if it failed.)
Got me thinking about which engines would be run before installation.
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Post by banjomd on Jun 23, 2010 11:18:49 GMT -4
Were the F-1 and J-2 engines test-run before being installed?
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Post by banjomd on Jun 23, 2010 7:38:49 GMT -4
I'm enjoying this DVD immensely! |
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Post by banjomd on Jun 18, 2010 15:48:30 GMT -4
"Episodes include:
The Saturn V Rocket
The Command Module
The Navigation Computer
The Lunar Module
The Space Suit
The Lunar Rover"
No mention of any other features.
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Post by banjomd on Jun 17, 2010 13:39:01 GMT -4
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Post by banjomd on Jun 17, 2010 12:06:11 GMT -4
My consoling thought: With the passage of time, Kaysing's name will fade. Armstrong, Collins, Aldrin Conrad, Gordon, Bean Lovell, Swigert, Haise Shepard, Roosa, Mitchell Scott, Worden, Irwin Young, Mattingly, Duke Cernan, Evans, Schmitt will live on. |
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Post by banjomd on Jun 10, 2010 5:43:38 GMT -4
I watched the live video stream from SpaceX's website.
When I watched replays from other sites the video problems seemed to be the same (eg. @ staging) making me think that the problems were at the source.
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Post by banjomd on Jun 9, 2010 8:23:50 GMT -4
All hail the Huge Mutent Insect Overlords that appear about 7 secs in. Is that one of Florida's famous "Palmetto bugs" ;D The dropouts and buffer problems make me realize how good NASA's video is. |
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