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Old 06-18-2015, 04:51 PM   #1 (permalink)
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Aerolid mod for Trailer Towing



Truck is ready to tow our trailer to AZ for a two day camping trip and proof of concept on modifying the Aerolid for trailer towing. I got the back braces built today. The second picture is of the truck parked next to the trailer with the aerolid only to show the nature of the problem I am trying to solve.

Our trip is 448 miles round trip for which I should be able to get over 400 miles worth of data. I will have a full tank data set on Sunday when we return on Sunday the 21st. If we can do 13 mpg we will consider that a coup.


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Last edited by aerostealth; 06-18-2015 at 05:01 PM..
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Old 06-18-2015, 04:56 PM   #2 (permalink)
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Ford XLT Naked - '14 Ford F-150 XLT
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Local 120 volt 2015 C-Max Energi - '15 Ford C-Max Energy SEL
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This is the back braces which I installed this morning. I think they really lock the lid in place from moving sideways. The actually fit in the latches and are bolted together in the middle where they cross. The picture below shows the sight line the air sees towards the top of the trailer.

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Old 06-18-2015, 05:22 PM   #3 (permalink)
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Aerolid RV version

*You can see how the 4RUNNER roof would be better than the fastback Aerolid for towing


*In another table (I don't have it available) a roof deflector to direct the air up and around the nose of the trailer is good for a 15% drag reduction.
*The Aerolid RV combines the larger tow vehicle wake of the 4RUNNER,plus goes beyond,with it's integral air deflector,increasing the F-150's wake,from 27 sq-ft (12-mpg),to 37-sq-ft (? mpg).
*NASA's roof deflector was good for a 15.7% drag reduction.
You should have some interesting numbers by Sunday.
Travel safe!
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Old 06-18-2015, 05:33 PM   #4 (permalink)
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90 day: 15.04 mpg (US)

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90 day: 19.8 mpg (US)

Ford Stealth G-4 - '14 Ford F-150 4X4 Super Crew XLT
90 day: 18.7 mpg (US)

XLT Towing Keystone 5th wheel trailer - '14 Ford Keystone 5th Wheel XLT
90 day: 11.72 mpg (US)

Trip 2015 C Max Energi - '15 Ford C Max Energi SWP
90 day: 38.2 mpg (US)

Local 120 volt 2015 C-Max Energi - '15 Ford C-Max Energy SEL
90 day: 55.65 mpg (US)

Local 240 volt 2015 C-Max Energi - '15 Ford C Max Energi SLE
90 day: 57.63 mpg (US)

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I did some measuring last night and 39 sq ft is our number.
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Old 06-19-2015, 05:00 AM   #5 (permalink)
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Distance from lid edge to trailer front? (The gap)

The work looks nice
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Old 06-19-2015, 07:21 AM   #6 (permalink)
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Ford XLT Naked - '14 Ford F-150 XLT
90 day: 15.04 mpg (US)

Ford G-4 with Stinger - '14 Ford F-150 4X4 Super Crew XLT
90 day: 19.8 mpg (US)

Ford Stealth G-4 - '14 Ford F-150 4X4 Super Crew XLT
90 day: 18.7 mpg (US)

XLT Towing Keystone 5th wheel trailer - '14 Ford Keystone 5th Wheel XLT
90 day: 11.72 mpg (US)

Trip 2015 C Max Energi - '15 Ford C Max Energi SWP
90 day: 38.2 mpg (US)

Local 120 volt 2015 C-Max Energi - '15 Ford C-Max Energy SEL
90 day: 55.65 mpg (US)

Local 240 volt 2015 C-Max Energi - '15 Ford C Max Energi SLE
90 day: 57.63 mpg (US)

Energi Combined - '15 C Max Energi Leather
90 day: 51.2 mpg (US)

Moon Dust 90% CE - '19 Chevy Bolt Lt
90 day: 119.44 mpg (US)

Moon Dust without CE - '19 Chevy Bolt Lt
90 day: 132.64 mpg (US)
Thanks: 2
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Four feet. The biggest improvement short of gap fillers would probably be ruling or radiusing the edges of the trailer.
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Old 06-19-2015, 09:32 AM   #7 (permalink)
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I also like the look. I will be more than surprised and demand a recount if there's not a noticeable difference.
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Old 06-19-2015, 09:58 AM   #8 (permalink)
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Adding functionality like that while keeping a reasonable look is amazing work. I can't wait to see numbers too.
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Old 06-19-2015, 04:47 PM   #9 (permalink)
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NASA's 'Aerolid RV'

Here's NASA's tractor-trailer setup,circa 1977.They said the got everything they needed from a local hardware store.Probably Lancaster,California.I don't remember Rosamond having one.They got a crosswind-averaged drag reduction of 67% with the complete kit.


Here's the old wing setup


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Last edited by aerohead; 06-19-2015 at 05:07 PM.. Reason: add image
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Old 06-20-2015, 03:42 PM   #10 (permalink)
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extra images

Here is a drag table from Hucho's book showing the effectiveness of the roof-mounted air deflector

Here you can see the actual flow being influenced by the deflector

This image I found online this morning,showing a pickup with deflector

Here's a tow vehicle under crosswind conditions

Here's box truck under crosswind conditions.Notice the leeward jet blasting out from the gap.This can be 16% or so of the drag on a rig.

Here's Hucho showing us the enormous fuel-robbing wake

Like a parachute added to an otherwise 'clean' form

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Last edited by aerohead; 06-20-2015 at 03:45 PM.. Reason: correct image
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