The Seat Fuel Tank is ranked tenth because it is the one invention on this list that never went ‘live’. It was too tempting to include at least one contraption that was such a fail that it hardly made it off the drawing board. The Seat Fuel Tank represents this class of failed ideas with pride. Kenneth Brock will forever be remembered as the man who suggested fighter pilots strap into a seat filled with fuel. In theory, Mr. Brock was probably right: the extra fuel capacity could mean longer flight distances. However, try to convince the pilot to strap into his own personal bomb. Any jet that would implement Mr. Brock’s design would be the first to have a pilot eject because of an emergency only to have the fire follow him into the atmosphere.