Originally Posted by boowho
Cajun, what do you think those "wings" on the bottom of 53 foot trailers hanging almost to the ground are for?? Yep, fuel economy. Same way with those weird looking "contraptions" on the REAR of some trailers.
'twouldn't surprise me a bit to find that airtabs might help quite a bit.
These are two entirely different concepts, completely.
The skirts under the trailers help reduce drag by keeping a lot of air out from under it, the panels at the back enhance the airs ability to easily glide past the trailer instead of creating turbulence and drag.
The items that the OP has shown will do neither, they will induce drag, which helps to stabilize the trailer, in theory... this is all very basic aerodynamics, nothing magical or mysterious about it.
Would still like to see some test results...