<blockquote><font class="small">In reply to:</font><hr /><p>"While the 'Direct' approach gives flexibility to the launch vehicle, and thereby decreasing safety. "<br /><br />This is baseless and has no meaning<p><hr /></p></p></blockquote><br /><br />Well then, the next time a chef asks you for a knife and you give him a swiss army knife you may be surprised that's he's angry with you.<br /><br />Multi function knives, multifunction guns, all have the same problem. They do many things but not well.<br /><br />So with any system.<br /><br />If you use a specialized system as it was designed to do over and over again, you will find that procedures get honed and systems get tuned, your operation costs drop to a minimal.<br /><br />But if have to use a multifunction system and do it differently every time, your operational costs soar, there's learning curves every step of the way, and also at every step greater potential for mistakes and accidents.<br /><br />That's why factories are built and operate the way they do, to cut time and costs. <br /><br />BTW jim, though you said 'no' your explanation agrees with mine:<br /><blockquote><font class="small">In reply to:</font><hr /><p>Not with launch vehicles. More launches of the same vehicle is more safer<br /><p><hr /></p></p></blockquote><br />Exactly my point, that is the same vehicle configured the same way is safer. <div class="Discussion_UserSignature"> <p> </p><p><font color="#0000ff"><em>"SCE to AUX" - John Aaron, curiosity pays off</em></font></p> </div>