The oft-cited Defense Science Board (DSB) report (see sidebar) says one of its top 3 game changing energy technologies is the replacement of massively energy inefficient helicopters with tilt-rotor craft like the V-22 Osprey. (Note: an earlier post covers one of the other two, the Blended Wing Body aircraft design.)
The DefenseTech blog recently commented on the Army's decision to begin training with the V-22. While the author cites the undeniable tactical advantages: twice the speed and range of helicopters, the DSB and me are also excited about the huge fuel savings the V-22 brings. This is great stuff ... check it out here.
DOD Photo courtesy of Jim Gordon @ Flickr