Quote:
Originally Posted by Tango Charlie
I can see that it would have the greatest advantage in town, but why not optimize it for cruising on the highway?
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If the tow vehicle has an engine that is too big for good fuel economy, then it may still make sense to run a smaller engine on the trailer and turn off the tow vehicle's engine.
If the tow vehicle has an efficient engine, then I would try adding a steam engine to the trailer to use the waste heat from the tow vehicle's exhaust.