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Old 08-16-2023, 03:13 PM   #11 (permalink)
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Freebeard, are you talking about 1, 2, 3, or yes (all 3) in terms of radius-ing the edges? I think you're talking about 1. Unfortunately for the aero of this rig, this was planned ahead to have a gap for an eventual overlanding style rack system (custom built) to go over the cap and also have a ladder/lumber rack to extend over the cab. I know, its going to absolutely kill the aero, but if I can tow less, even with bad aero, I'll still be getting better than the 15-ish mpg I get towing.

Aerohead, I looked up that aerolid. Thats an awesome concept. Also, Im a big fan of your truck! Youve gone all in, and you are super knowledgeable with all this stuff. I appreciate all that you are willing to help and share! Keep up the good work!

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Old 08-16-2023, 03:29 PM   #12 (permalink)
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The numbering system helps.

Nos. 1 and 2 should be as flush as possible.

No. 3 is where you could apply a radius. A counterexample is the Cybertruck. It has a sharp crease. Either would be better than the exposed raw edge.

Subject to aerohead's confirmation, of course.
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Old 08-17-2023, 03:45 AM   #13 (permalink)
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nice job pretty well design
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Old 08-17-2023, 11:37 AM   #14 (permalink)
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'cybertruck'

Quote:
Originally Posted by freebeard View Post
The numbering system helps.

Nos. 1 and 2 should be as flush as possible.

No. 3 is where you could apply a radius. A counterexample is the Cybertruck. It has a sharp crease. Either would be better than the exposed raw edge.

Subject to aerohead's confirmation, of course.
The Tesla is a unique case. It's entire greenhouse is inclined ( raked ) such that, for it's entire length, incuding the vault, it's attacking the flow, always in a favorable pressure negative gradient of accelerating flow, even past the maximum cross-section, where it would ordinarily transition to an adverse, positive pressure gradient.
And since it has five widths in plan-view, with subtle body camber on the entire upper body, and there's actually not a 'straight' surface, except underneath, Fran Von Holzhauzen's getting away with murder in plain view, and no one's figured it out.
The roofline contour is also 'curved' and it's so 'relaxed' that, with respect to the body sides, he's put in enough tumblehome that, edge vortices, and attached longitudinal vortices aren't going to spin up as most fear. The shear isn't there like some imagine. It's not going to produce rear lift either. Quite the contrary. The folks at Loughborough University have figured this out already this year.
Legacy carmakers will be crying into their champagne glasses when they figure it all out.
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Whatever edge radii exists on the cab of the Maverick would probably suffice on the shell. Transitioning to 'more' is better, says Morelli. But there again, we're talking about the most 'expensive' shapes to fabricate known.
You can't create cardboard mockups for testing in a few minutes. You want to come out of the shoot 'close' to the final architecture.
Like I said, duplicating the 1972 Porsche 911 Carrera RS 2.7 'Ducktail' spoiler is going to cost $94,000 in today's Dollars, if you're gonna do it like Hermann Burst and Harm Lagaay.

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aero cap, ford maverick, truck shell aerodynamic





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