Quote:
Originally Posted by Istas
aerohead: This is why I was thinking those airtabs might actually be a benefit in this situation. The two reports on airtabs that MetroMPG pointed me to were done on an '06 Camry and an '03 Prius, both smoother cars than mine. But even if I do try them (and really, given the design of the aluminum vortex generators, it shouldn't be too difficult to mock up some of my own on the cheap to get at least a rough guideline), I'm going to wait until I have my MPGuino installed and calibrated before I even think about testing VGs.
(I don't trust that picture either, even I'm not sure if it's level, and at any rate I get the feeling my camera (which is more than a few years old) warps pictures.)
Also, getting cfd software running will help too.
A rear spoiler off the edge of the trunk seems like it'd be really easy to do. Also, I get the impression that adding that sharp transition at the trailing edge of other parts of the car would help as well? like on the sides of the rear bumpers? (it's rounded there too)
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Yeah,the air tabs ( turbulators ) were first offered by an aeronautical engineer.No doubt,he saw their value in supporting flow off of wings and onto flaps for wings at high angle of attack ( like flow off your roof onto the trunklid ).And the car shown in his article is a Honda Accord notchback,much like your Legacy in form.------- I do think the rear spoiler would,and should help at the gas pump.Straight back,like the E-85 Cobalt would be okay too,but it would need to extend back to intersect the 13-degree line.And softening the rear edge would help pedestrians if the inadvertedly walked into it.