Saw this today:
Quote:
ATDynamics TrailerTail ® – increases fuel efficiency of tractor trailers by over 5%
In 2008 it became the first and still the only rear fairing to be:
- validated for fuel efficiency by the US EPA based on SAE testing;
- sufficient for standalone compliance with 2010 CARB regulation supporting trailer aerodynamics;
- exempt from US DOT length restrictions verified in an FHWA compliance letter provided to all TrailerTail® customers.
- The device opens with one touch and closes in 5 seconds.
- In the open position, it boosts fuel economy by 5.1% at 62 mph, according to SAE J1321 Type II fuel economy testing.
- In the closed position, it folds flat against swing doors to enable normal access to cargo.
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Grabbed this tuft testing image from the video as well:
company web site:
ATDynamics.com - way to go!