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Old 11-19-2019, 01:28 PM   #951 (permalink)
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Quote:
Originally Posted by Prii View Post
I am currently brainstorming ideas for an aerodynamically clean cargo trailer to pull behind my Prius for a cross-country move. I have a basic 4'x8' flatbed utility trailer (which knocks 10-15 mpg off the Prius even when unloaded), a longer converted boat trailer and a narrower jet ski trailer. My thought is to try to keep the trailer's frontal area well within the frontal area of the Prius. I need to protect the contents from weather so am toying with building a very lightweight "poor man's fiberglass" shell. I also am thinking the bottom should be sheathed to cut down friction from the road surface. Anyone have any ideas/experience along these lines?
I've mentioned it before, perhaps in this thread, but my Prius gets better fuel economy pulling a 4x8 trailer when it is loaded vs unloaded. This is assuming the 2' sidewalls are up. When that box is empty, it acts as a parachute. Full, it's hardly noticeable at steady cruising.

With the sides removed (flat trailer), I can't tell the trailer is attached at all.

If you're running walls, the best thing you can do is find something to cover the cavity. Start there and see if additional work is worth the cost/time.

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Old 11-19-2019, 01:58 PM   #952 (permalink)
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Old 11-19-2019, 08:33 PM   #953 (permalink)
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aero trailer

Thanks for the response, Redpoint5. Thatís an interesting point about covering our filling out the area within the side planks. I tow a converted boat trailer with a 4x8 flat bed around town with varying loads on a regular basis (I refer to it as my stealth pickup truck) and it always costs me at least 10 mpg (which is still almost twice the mileage my old 6.5 Suburban, of course). I have to move a loveseat, two porch gliders and assorted chairs about 850 miles and am looking for the most efficient way to go.
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Old 11-19-2019, 09:48 PM   #954 (permalink)
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Quote:
I have to move a loveseat, two porch gliders and assorted chairs about 850 miles and am looking for the most efficient way to go.
So, something less than 85 gallons of fuel?

What is the replacement cost of the seats and chairs? Sentimental value?

Use the flatbed trailer you have, arrange the load as compactly as possible, then tarp it and use a spider net.

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Old 11-19-2019, 09:49 PM   #955 (permalink)
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aero trailer

Valid considerations, Slowmover. I did not check Penske, specifically, but a Uhaul truck big enough to haul the Prius and the furniture is just under $500 one way and another $300-350 in fuel whereas the Prius can do it for about $60 worth of fuel. My standard approach to most challenges of this sort is to determine if there is a solution which can be accomplished for equal or less money which will result in new assets for future use (I.e. tools, equipment, etc, etc). Since I am retired, I generally have way more time than money so I don't factor my labor/effort into the equation. As far as the furniture goes, some of it has sentimental value.

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