Quote:
Originally Posted by radioranger
Just put a partial cover on the old ranger, first long test to work today 130 miles round trip highway. the wing idea on the roof sounds good but what would it look like and how far back should it go , maybe a simple panel just below the back edge of the roof? and extending back maybe a foot or less to also act as a shade in summer. ?
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The size and angle of the wings tested by Texas Tech varied as function of bed length.I don't have that paper with me but I'll get it.
John Gilkison fabricated a boat-tailed cab wing 'box' which mounted to the bed rails,just behind the cab,rather than attempt to attach a wing directly to the cab.
It extended back 18",with the sides angled in @ 7-degrees.The top actually had no angle at all,but had a trailing edge which captured an 8-12-degree angle up to the cab roof,creating a locked-vortex.The open space allowed for the 3rd brake light.
Between this and a half-tonneau,we got the 8% mpg improvement which Tech published about.