...interesting to read the confusion and disinterest from some people. The shared Photoshop contribution came from an earlier thread; the simple request for aero ideas on an large EXISTING trailer. Like I mentioned, the rendering combined many intriguing ideas. The first was a custom front deflector, when not in use could be retracted flush to the pickup cab cover.
http://www.fiberglassrv.com/forums/a...1&d=1280143335
The next is a pyramidal-shaped nose cone on the top & front of the trailer, that serves as a tighter aero bow but still clears the truck rear quarters on tight turning maneuvers.
NoseCone On Aerodynamics
The most controversial ideation is the re-contoured top profile. The concept retro-fits a curved top following the Don-Bur 'teardrop' case studies, that even a resulting larger frontal area with a flowing teardrop top profile still tested in savings!!
Aerodynamic Teardrop Trailer
(Note: Don-Bur Teardrop design is a vigorously protected & registered design).
Requisite wheel covers & spats.
And to terminate all the flow was adding a fold-away boat tail, now existing and producing savings for 'enlightened' long-haul trucking companies.
http://www.atdynamics.com/gallery_video.htm
...nothing exotic but the 'vapor' concept does combine many proven ideas to a whole towing aero package.