“ Hydrogen Power Does anyone know of any work going on towards hydrogen-burning turboshafts (or just turbines)? I know the combustion temps are too... (read full comment) ” 

Posted on July 1, 2008 at 1:51 AM EDT

“ He3 density That's about .0000005 pounds per square foot, spread out nice and even across the entire lunar surface. I'm an AE, not a physicist,... (read full comment) ” 

Posted on June 27, 2008 at 10:58 PM EDT