Quote:
Originally Posted by MetroMPG
Good explanation, thanks.
I also basically guessed at side angle. I arbitrarily chose 10 degrees, and then eyeballed it by holding up a cardboard triangle with a 10 degree angle while laying out the strings.
One interesting result of my imprecise construction techniques that resulted in the boat tail being skewed somewhat to the passenger side: I've effectively tuft tested two different side angles. I haven't measured them yet, but will this week and will report back.
FYI, I measured the bottom angle: it's 4 degrees from the undertray to about a quarter of the way along the length of the boat tail, where it transitions to 7 degrees. And we saw from the tufts that it had attached flow to the end.
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Most probably because of the belly tray you have installed, do you agree?
IOW, for the average Metro owner, the angle that maintains attached flow will probably be much less, perhaps half of that, due to extremely turbulent flow to the fore end of the transition to smooth surface.
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