I hadn't noticed the A-pillar deflectors. The one across the windshield is [apparently] translucent. It could be a sun shade for the driver.
I think the locomotive deflectors are done right, although I suspect it was for mitigating the black smoke plume. They will capture more air stagnating on the front and pressurize it.
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Face the danger and row away from it.
David B. Frohnmayer _________________
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