A surprisingly simple tweak is making a venerable military transport aircraft more efficient. Literally gluing a few microvanes to the rear fuselage of a C-17 Globemaster III cargo plane can result in fuel savings in the tens of millions of dollars.Introduced in 1995 as a replacement for the workhorse Lockheed C-141 Starlifter, the Boeing C-17 Globemaster III has become a major logistical asset for not only the US Air Force, but the Royal Air Force, the Royal Canadian Air Force, the Royal Austra...