Fair few requests relating to this,
Hydrogen rich, hence the need for the sparklers
Quote from: Jim on 12/17/2008 11:04 amHydrogen rich, hence the need for the sparklersI think alot of folks still think the sparklers ignite the engines, but they actually ignite any free, unburned hydrogen under the engine nozzles so there's not an explosion down there at engine start. Just wanted to clarify that for anyone 'new' to shuttle launches.
Quote from: shuttlefan on 12/17/2008 12:45 pmQuote from: Jim on 12/17/2008 11:04 amHydrogen rich, hence the need for the sparklersI think alot of folks still think the sparklers ignite the engines, but they actually ignite any free, unburned hydrogen under the engine nozzles so there's not an explosion down there at engine start. Just wanted to clarify that for anyone 'new' to shuttle launches.So what does ignite the engines?
Oh lordy, that's something special. I also found it beautiful, as much as I know it's a truckload of power coming out of the aft.
The timer.
In regards to the timer on the right side of the screen, can anybody help with interpretation of it or is it REALLY technical?
is the original, longer video available somewhere.
Quote from: rtphokie on 06/09/2009 02:39 pmis the original, longer video available somewhere.L2
Quote from: stockman on 06/09/2009 02:44 pmQuote from: rtphokie on 06/09/2009 02:39 pmis the original, longer video available somewhere.L2I figured as much, where on L2?
Quote from: rtphokie on 06/09/2009 02:45 pmQuote from: stockman on 06/09/2009 02:44 pmQuote from: rtphokie on 06/09/2009 02:39 pmis the original, longer video available somewhere.L2I figured as much, where on L2?If you have a subscription to L2 simply do a SEARCH on "QUvis" - I think the STS126 one is the first hit..
Hello everybody. Read the news storys all the time but first time on the forum. Sorry for the stupid question but why do the SSMEs take a few seconds to ignite and power up and the SRBs fire up almost immediately?Awesome video.
Quote from: Tommy E on 02/17/2011 08:29 pmHello everybody. Read the news storys all the time but first time on the forum. Sorry for the stupid question but why do the SSMEs take a few seconds to ignite and power up and the SRBs fire up almost immediately?Awesome video.Because of the way liquid v. solid engines work.
Because of the way liquid v. solid engines work.
But Delta 4's are liquid and that seemed to go up straight away too?
Big engines tend to need several seconds to really get going.
Quote from: ChrisGebhardt on 02/17/2011 08:33 pmQuote from: Tommy E on 02/17/2011 08:29 pmHello everybody. Read the news storys all the time but first time on the forum. Sorry for the stupid question but why do the SSMEs take a few seconds to ignite and power up and the SRBs fire up almost immediately?Awesome video.Because of the way liquid v. solid engines work.So that is why Ares I-X ignited and went up straight away. But Delta 4's are liquid and that seemed to go up straight away too?
Hey guys !Just found this thread, and had to say, the video is just great !One question though : what about the water deluge system on the SSME ? we can see the rainbirds flooding the SRB side of the MLP with water, but what about the SSME ?I guess there must be some water deluge there too ?I've seen it already, but couldn't find the source anymore..
There is a deluge in the SSME duct but there is not one needed on the top side. The rainbirds are not there for the SRB exhaust, notice that they do not "come on" until after liftoff. The rainbirds cover the deck of the MLP with water so that the acoustic noise from the vehicle does not reflect of the deck and damage the vehicle.
Cyril_13Perhaps you may want to review this thread. Unfortunately, some of the video links are broken, but if you go to the KSC video library, and search on "Sound suppression water test", you will get two video clips and stills.http://forum.nasaspaceflight.com/index.php?topic=653.0
Quote from: catdlr on 03/15/2012 07:14 pmCyril_13Perhaps you may want to review this thread. Unfortunately, some of the video links are broken, but if you go to the KSC video library, and search on "Sound suppression water test", you will get two video clips and stills.http://forum.nasaspaceflight.com/index.php?topic=653.0The video of the test and the interview afterwards can be viewed in L2 at this link: http://forum.nasaspaceflight.com/index.php?topic=9594.0Tony D.
One problem though... I get the message "The topic or board you are looking for appears to be either missing or off limits to you." when clicking on your link.
L2 is subscription access only. To gain access to all the L2 boards you need to sign up for it: http://www.nasaspaceflight.com/l2/
Quote from: catdlr on 03/15/2012 08:05 pmQuote from: catdlr on 03/15/2012 07:14 pmCyril_13Perhaps you may want to review this thread. Unfortunately, some of the video links are broken, but if you go to the KSC video library, and search on "Sound suppression water test", you will get two video clips and stills.http://forum.nasaspaceflight.com/index.php?topic=653.0The video of the test and the interview afterwards can be viewed in L2 at this link: http://forum.nasaspaceflight.com/index.php?topic=9594.0Tony D.Cheers!One problem though... I get the message "The topic or board you are looking for appears to be either missing or off limits to you." when clicking on your link.I've read the 3 pages, very interresting stills, but no information on when the deluge inside the SRBs holes is started.That's amazing to see how many deluges they have : 2 in SRBs holes, one for the SSMEs, one on the MLP with the rainbirds, one on the deflector edge and one in teh SRB trench, after the SRB deflector !!... and I might even heve forgotten one....
Another cool thread. What will be the main difference between the RS-25D and RS-25E? Will actual hardware be removed?