Thanks TWT, for the Saturn V article. I just had good read through it. The stats and figures are monsterous! I feel the same awe as I got when I found the same sort of info on the V2 weapon. I remember struggling to absorb the key facts such as 500 hp (if memory serves) being needed just to drive the fuel pump for the main engine. 500 hp is a good amount of power for a decent road car at the start of the 21st century and they were using this much just to drive a fuel pump in the 1940s. Magic.