Thread: The DragBean
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Old 12-12-2015, 11:57 PM   #20 (permalink)
DragBean
PizzaRimBoy
 
Join Date: Dec 2015
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??

@CD

So why would rounding the front NOT decrease the overall drag? Pretty much in any sub-sonic application a rounded approach will allow air to slip around the object far better than a flat face.

Maybe it could create unwanted flow separation on the sides but that would definitely already be there.

Aerospaceweb.org | Ask Us - Drag of Cylinders & Cones

And I did the front fiberglass part (originally there was an air gap between the rounded word part and the hood- that was hardly a 1 mpg improvement) and pizza rims on my tires both at the same time and my mpg went from 31-36 to now I have at 38.7 tank and a 41 mpg tank. Pizza Rims were probably only about 25% of the gains because other people would see 10% gains with terribly unaerodynamic rims.

But this is good news. It looks like if I do the back I'll get some huge improvements.

I also have a panoramic mirror that relies on the back not being obstructed... That means I would have to make the rear panel out of bended plexiglass to still have the benefit of essentially no mirrors. A little bit of a curve might be a tad better than a flat panel.
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