[aerohead]

none of the designs truly respect aerodynamics.They're "way out ahead of nothing",however can all be improved.I built a "micro" teardrop two-wheel trailer for my CRX,drove it to Los Angeles from Denton,TX,pulled 500-pounds of NiCad batteries back with it,and averaged 50-mpg for the trip.On the return leg,the rig weighed over 2,800-lbs,as much as a Ford Taurus.The bottom of the trailer was not completed,so the trailer was a lot "dirtier",than had it been finished.I believe that if properly executed,the trailer can actually "improve"mileage for the car/trailer combo,as I only lost 2-mpg pulling the trailer,running half a ton heavier than the CRX by itself.Time will tell.