[Quagmire]

Originally Posted by PB PM Why did they feel the need to reinvent the wheel. Just build another Saturn V type rocket, at least the things worked.

No reinventing the wheel. That was the whole point of SLS. Everything is heritage hardware. The SRB's are Shuttle SRB's with an extra segment and new fuel mixing. Core stage is the external tank stretched. The ICPS is a modified Delta IV upper stage. The engine on the service module is the Shuttle OMS engine. The main RS-25 engines are literally engines that flew on Shuttle.

I would say this is due mostly of the time between Shuttle and SLS that a lot of old knowledge wasn't passed along due to the turn over. It's why a rocket that barely flies( aka Delta IV Heavy) runs into issues a lot.

Originally Posted by Brad More excellent journalism from Ars: Warning sign? NASA never finished a fueling test before today’s SLS launch attempt Also, yikes.

Bashing on SLS/NASA is popular....

If these guys were around during Apollo, I wonder how they would be reacting to Apollo 4. " What you mean they are testing the Saturn V in an all up test!?!?!?"