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Bypass all this by having an inflatable front and back that auto-inflate to make a pointed front and back when going over 40 mph on a straight road In the U.S.
by reaperducer 4y ago
Bypass all this by having an inflatable front and back that auto-inflate to make a pointed front and back when going over 40 mph on a straight road
In the U.S., many tractor trailers have something similar, but they fold out on the back and underneath the trailer to make the rig more aerodynamic.
Example: https://www.fleetequipmentmag.com/wp-content/uploads/2015/03/ATDynamics-Trailer-Tails.png https://www.fleetequipmentmag.com/wp-content/uploads/2015/03...
I've never seen any fold-out attachments for the front, so there's probably not much to be done there, except for the roof of the cab, which often has a built-in fin/wing/whatever to help air get over the trailer.
- bombcar 4y agoA flat front isn't a major issue at all - the most aerodynamic shape is roughly a teardrop - and the "front" of a teardrop is mostly flat anyway. It's the backend and the wake you cause that is the major problem.
- jubjubbird 4y agoSeems like more often than not I see them folded up, not in use. Even with the price of diesel. I wonder how much they save?
- _ea1k 4y agoMaybe 5% at best? Probably less, given that there's always some time spent at lower speeds too.
- bluGill 4y agoThey are not allowed in all states/areas. So you might be someplace where they are not allowed, or close enough that there isn't a good place to stop and put them back out. I see them in use all the time, but that is a reflection of where I live.