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Old 03-17-2025, 08:25 AM   #241 (permalink)
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That’s an incredible project! The Zevo 600 is already a game-changer for electric vans, and adding an aero tail could really push its efficiency even further. Your design with the roll-out feathers sounds like something straight out of aerospace engineering. A 20% drag reduction would be a huge achievement—can’t wait to see the data when you test it.

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Old 03-18-2025, 08:11 AM   #242 (permalink)
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Quote:
Originally Posted by paniwew View Post
That’s an incredible project! The Zevo 600 is already a game-changer for electric vans, and adding an aero tail could really push its efficiency even further. Your design with the roll-out feathers sounds like something straight out of aerospace engineering. A 20% drag reduction would be a huge achievement—can’t wait to see the data when you test it.
If 68% of fuel is used accelerating mass. vs 14% for aero drag (city driving)
then (weight adding) aero takes a 5X second place to weight saving panview, so be careful not to get too carried away by easy aero mods unless you spend a LOT of time driving on freeways.

About 2% of the world average is freeway driving.
IMHO that's why car makers don't bother much with boat tails etc.


JohnForde is in fact on the the freeway more than in town.
But I'd still love to see before/after freeway AND city economy numbers..!?
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Old 03-19-2025, 12:21 PM   #243 (permalink)
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' before, after, and city '

Quote:
Originally Posted by Logic View Post
If 68% of fuel is used accelerating mass. vs 14% for aero drag (city driving)
then (weight adding) aero takes a 5X second place to weight saving panview, so be careful not to get too carried away by easy aero mods unless you spend a LOT of time driving on freeways.

About 2% of the world average is freeway driving.
IMHO that's why car makers don't bother much with boat tails etc.


JohnForde is in fact on the the freeway more than in town.
But I'd still love to see before/after freeway AND city economy numbers..!?
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John completed his long road trip with the tail, and published the results for comparison on Facebook, if you can locate it.
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Old 03-20-2025, 10:38 AM   #244 (permalink)
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Depends on where you live...... in LA, 85-90 percent is on the freeway. Might still be low speed, but I worked nights and commuted in the other direction.
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Old 03-22-2025, 02:13 AM   #245 (permalink)
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Originally Posted by aerohead View Post
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John completed his long road trip with the tail, and published the results for comparison on Facebook, if you can locate it.
Any spoilers for those who avoid FB?
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[Old] Piwoslaw's Peugeot 307sw modding thread
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Old 03-22-2025, 03:30 AM   #246 (permalink)
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Old 03-22-2025, 08:32 AM   #247 (permalink)
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Originally Posted by JohnForde View Post
2 more pics of the tail, pre trip.
Second one shows L bracket for structure hanging out in the wind.
I'm sure you will evolve a more elegant solution as time allows.

Gotta do what you gotta do to get to the goal.

Like my engineer used to say, it's always right the second time around.

Thanks for posting here, I'm not a Face bloke guy either.
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Old 03-22-2025, 12:10 PM   #248 (permalink)
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' spoilers '

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Any spoilers for those who avoid FB?
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Wish I could say yes, but diving into Facebook would be a luxury I can't afford for awhile.

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