Delta IV Heavy launch attempt now Saturday Jan. 17, 2009

[shuttle_guy]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Okay, that makes total sense now. Yay. <br />Posted by rybanis</DIV></p><p>I understand told that the Russian Soyuz booster strap ons are not bolted on at all. The weight of the vehicle on the pad keeps the forward pin in a a grove. During the boost the strap ons thrusting keep the pin in the grove. When the strapons burn out the simply fall away. No explosive bolts or any high tech sep system at all. (The rocket was designed as a ICBM in the late 1950's and is used today as their manned booster for the Soyuz spacecraft.)</p> <div class="Discussion_UserSignature"> </div>

 

[rybanis]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>I understand told that the Russian Soyuz booster strap ons are not bolted on at all. The weight of the vehicle on the pad keeps the forward pin in a a grove. During the boost the strap ons thrusting keep the pin in the grove. When the strapons burn out the simply fall away. No explosive bolts or any high tech sep system at all. (The rocket was designed as a ICBM in the late 1950's and is used today as their manned booster for the Soyuz spacecraft.) <br /> Posted by shuttle_guy</DIV></p><p><img src="http://sitelife.space.com/ver1.0/content/scripts/tinymce/plugins/emotions/images/smiley-surprised.gif" border="0" alt="Surprised" title="Surprised" /></p><p>Russian simplicity once again, but what if a strap-on has an engine failure!? I could see on the good side that the damaged strap on would simply fall away, perhaps improving survival. On the other hand: the dynamics of having a strap on fall away could cause major problems.</p><p>Really cool info! I'm really looking forward to the launch tomorrow. </p> <div class="Discussion_UserSignature"> </div>

 

[shuttle_guy]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Russian simplicity once again, but what if a strap-on has an engine failure!? I could see on the good side that the damaged strap on would simply fall away, perhaps improving survival. On the other hand: the dynamics of having a strap on fall away could cause major problems.Really cool info! I'm really looking forward to the launch tomorrow. <br />Posted by rybanis</DIV></p><p>If the failure happens well after lift off the acceleration produced by the good engines in the core and other strap ons would produce a positive acceleration which would keep the dead booster attached. However, I think,&nbsp;the loss of a strap on at anytime after liftoff would cause the loss of the vehicle. <br /></p> <div class="Discussion_UserSignature"> </div>

 

[rybanis]

LOX loading about to begin... <div class="Discussion_UserSignature"> </div>

 

[rybanis]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>LOX loading about to begin... <br /> Posted by rybanis</DIV></p><p>Fast-fill for the liquid hydrogen almost complete. </p> <div class="Discussion_UserSignature"> </div>

 

[fname]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Yeah, if I were in the area I would seriously be making an attempt to see it. I've heard the launch is quite a bit louder than you would expect...&nbsp;One thing I've always wondered with the Delta IV-H is just how they can get away with having such tiny connecting struts on the strap on boosters? I mean, obviously it works, but they look so fragile and weak. i guess the same could be said for the connections between the SRB's and the ET on the shuttle (and for that matter, the ET and the shuttle ittself).&nbsp; <br /> Posted by rybanis</DIV></p><p>Those struts don't carry much of the load, they are there to keep it stable laterally. Most of the load is transferred by a ball & joint or pin (think very big pin!) at the bottom of the vehicle. </p>

 

[newsartist]

<p>Technical issues.</p><p>&nbsp;New launch time 8:13 est.</p><p>Webcast is live now.</p> <div class="Discussion_UserSignature"> </div>

 

[Testing]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Technical issues.&nbsp;New launch time 8:13 est.Webcast is live now. <br />Posted by newsartist</DIV><br /><br />Testing&nbsp;&nbsp; Copy <div class="Discussion_UserSignature"> </div>

 

[newsartist]

<p>HOLD at 55 sec</p> <div class="Discussion_UserSignature"> </div>

 

[newsartist]

<p>Recycling for another attempt soon....</p><p>&nbsp;Did you notice the flare from the H2 retort right when they held? Wow!</p> <div class="Discussion_UserSignature"> </div>

 

[rybanis]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Recycling for another attempt soon....&nbsp;Did you notice the flare from the H2 retort right when they held? Wow! <br /> Posted by newsartist</DIV></p><p>Yeah, that was pretty amazing.</p><p>&nbsp;</p><p>Lets hope the recycle will go quickly. </p> <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Yeah, that was pretty amazing.&nbsp;Lets hope the recycle will go quickly. <br />Posted by rybanis</DIV><br /><br />It does not appear that my Interwebz NASA TV link is covereing this.</p><p>Has any9one got an active link for the launch?</p> <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[rybanis]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>It does not appear that my Interwebz NASA TV link is covereing this.Has any9one got an active link for the launch? <br /> Posted by MeteorWayne</DIV></p><p>Check the first page...perhaps second post! Its most definately not a NASA stream.&nbsp; </p> <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Check the first page...perhaps second post! Its most definately not a NASA stream.&nbsp; <br />Posted by rybanis</DIV><br /><br />Thanx, I owe you a beer!!! <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>

 

[Testing]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>It does not appear that my Interwebz NASA TV link is covereing this.Has any9one got an active link for the launch? <br />Posted by MeteorWayne</DIV><br /><br />NASA TV is covering a fairwell address from Dr. Griffin. <div class="Discussion_UserSignature"> </div>

 

[newsartist]

<p>Voice over says problem is understood, and they are working on determining a new T-0.</p><p>&nbsp;There is no rush, the launch window doesn't close until 11:32 est.</p><p>When it resumes, the count will pick up at T-5min?</p> <div class="Discussion_UserSignature"> </div>

 

[rybanis]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>Voice over says problem is understood, and they are working on determining a new T-0.&nbsp;There is no rush, the launch window doesn't close until 11:32 est.When it resumes, the count will pick up at T-5min? <br /> Posted by newsartist</DIV></p><p>That was my impression. Back to 5 minutes at the hold point.&nbsp; </p> <div class="Discussion_UserSignature"> </div>

 

[rybanis]

New T-0 declared. I did not catch what it was, though. All the holds have been removed. <div class="Discussion_UserSignature"> </div>

 

[newsartist]

<p>T-5 and holding.</p><p>New T-0 is 0213z????</p><p>&nbsp;</p><p>*edit* that is correct, 9:13pm est</p> <div class="Discussion_UserSignature"> </div>

 

[Testing]

<p><BR/>Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>T-5 and holding.New T-0 is 0213z????&nbsp;*edit* that is correct, 9:13pm est <br />Posted by newsartist</DIV></p><p>&nbsp;L-10</p><p><br /><br />&nbsp;</p> <div class="Discussion_UserSignature"> </div>

 

[newsartist]

<p>Terminal count resumes in less than one minute. All is GREEN.</p><p>COunt resumes at T-5</p> <div class="Discussion_UserSignature"> </div>

 

[rybanis]

Countdown resumed! T-5! <div class="Discussion_UserSignature"> </div>

 

[rybanis]

Oh come on! Hold x 3 <div class="Discussion_UserSignature"> </div>

 

[newsartist]

<p>&nbsp;</p><p>HOLD</p> <div class="Discussion_UserSignature"> </div>

 

[MeteorWayne]

Replying to:<BR/><DIV CLASS='Discussion_PostQuote'>&nbsp;HOLD <br />Posted by newsartist</DIV><br /><br />Not a smooth countdown today!! <div class="Discussion_UserSignature"> <p><font color="#000080"><em><font color="#000000">But the Krell forgot one thing John. Monsters. Monsters from the Id.</font></em> </font></p><p><font color="#000080">I really, really, really, really miss the "first unread post" function</font><font color="#000080"> </font></p> </div>