<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by lyme:<BR>I dislike the direction NASA is taking with their plan to the moon and mars. Scrapping the shuttle and returning to previous tech really does not enthuse me with any sense of innovation.<BR><BR>Maybe Griffin wanted to return to designs that modeled the toys he played with as a kid, but it is all kinds of lame these days. </div></BLOCKQUOTE><BR>Frankly, the shuttle is a bad design and we should never have stopped using capsules. They're less expensive, more capable, and they sit on top of the launch vehicle where God intended them to be, rather than slung on the side directly in the path of falling ice and foam. We sacrificed a decade of heavy-lift competency and knowledge when we abandoned the Saturn program and shifted over to using the STS instead; Saturn's cargo capacity was so far beyond the shuttle's that a comparison is almost laughable. Even if Ares I is an abortion of a design, Ares V is an absolute jewel and a step in the correct direction--it's a giant rocket that can lift almost eight times as much as the shuttle per launch (188,000 kg to LEO, versus 24,400).<BR><BR>The shuttle is a giant flying compromise. It's a bad re-entry vehicle because plane-shaped objects collect and shed heat during re-entry a hell of a lot less optimally than do capsules (which also have the bonus of being self-righting, instead of having to be carefully balanced). To make the shuttle a better re-entry vehicle that doesn't explode in a fiery ball of plasma, it was necessary to give it a huge giant honking nose and big fat round leading edges--changes that make it about as aerodynamic as a falling brick with stubby wings. Even ignoring the fact that the heat tile system is vulnerable during launch to debris, dealing with the tiles during the between-mission refits is a maintenance nightmare; the system should never have been considered in the first place. Ablative phenolic heat shields are inexpensive, safe, easy, and have a proven track record, which is why Orion has them.<BR><BR>Shifting to capsules is not a step back--the shuttle itself was a LEAP backward and to the side, down an avenue we never should have gone in the first place. Orion puts us back on track to have a manned space program capable of going places and doing things, rather than endlessly pissing around in low earth orbit growing tomatoes and waving to 3rd graders.