Improving Canadian 5-6 axle trailers
Up here we often run 5-6 axle trailers to haul aggregates and garbage. The one that I'm thinking of is similar to this:
Here's a 4 axle version that might also be a possibility:
So how could I improve overall mpg pulling something like this? Obviously getting rid of the platform and tightening the tractor/trailer gap is one option.
1. Would short skirts help? I assume that there isn't enough room for an undertray system.
2. What kind of tires would you recommend on a spread axle that gets a lot of scrub wear? Super singles are an option.
3. I assume that a nice tight (mechanical) tarp would improve aerodynamics. When the trailer is empty, what's better - the tarp or the empty box with an open/flow-through back gate?
P.S. I don't actually own a trailer yet - I'm just thinking out loud.
Is this a good question?