Paul Breed on Unreasonable Rocket...3D printing rocket nozzles in stainless steel. Plastic in process filled cooling channels -> use multiple pieces, but welding destroys stainless coating. So, direct metal sintering: more expensive, but works much better.
Rand Simberg on Competitive Space Task Force[snip]Focus on safety over cost[…] Don't spend billions having evacuation systems for South Pole station.
Quote from: simonbp on 04/09/2011 11:58 pmRand Simberg on Competitive Space Task Force[snip]Focus on safety over cost[…] Don't spend billions having evacuation systems for South Pole station.Is he saying that cost is more important than safety? If not, those 2 statements seem to be rather contradictory. (Then again, a lot of what he says never seems to make any sense.)