I don't know if this has been posted elsewhere buthttp://www.aviationweek.com/Article.aspx?id=/article-xml/awx_07_01_2013_p0-592975.xml&p=1The article claims that Boeing has produced a small diameter, 2.4 m test tank that is 30% lighter than Li-Al alloy tanks.
The ~200 tonne upper stage enables a truly flexible path. Advanced boosters ... don't.
Quote from: sdsds on 03/24/2013 05:05 amThe ~200 tonne upper stage enables a truly flexible path. Advanced boosters ... don't.You might want to read this; Scroll to part IV. Here's a rocket scientist who disagrees with you.http://forum.nasaspaceflight.com/index.php?topic=32911.msg1106894#msg1106894