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Old 04-22-2021, 06:45 AM   #11 (permalink)
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Quote:
Originally Posted by planetaire View Post
No, for exemple Aptera have a negative cooling drag.
1. There is no official wind tunnel data available for the Aptera as far as I am aware. And it's not even a production car!

2. At least one ICE car for which I have independent wind tunnel data has a negative measured aerodynamic cooling drag.

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Old 04-23-2021, 12:41 PM   #12 (permalink)
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troubles is

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Originally Posted by JulianEdgar View Post
And thatís all great. Trouble is, on the only two BEV cars for which we have percentage cooling drag measurements (percentage of overall aero drag) the cooling drag values are in fact high! Not theory - actual measurements.
Trouble is, you've already forgotten what you said at # 162 permalink, page 17, on the now 'closed' thread about cooling drag.
Perhaps short-term memory loss.
Also, you may be hard-pressed to find any self-respecting statistician who'd jump to the conclusion of a 'trend', based upon two data points.
You might also want to quit now, while you've got any face, or credibility left to save.
Your may learn that your premise turns out to be indefensible.
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Old 04-23-2021, 05:41 PM   #13 (permalink)
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Quote:
Originally Posted by aerohead View Post
Trouble is, you've already forgotten what you said at # 162 permalink, page 17, on the now 'closed' thread about cooling drag.
Perhaps short-term memory loss.
Also, you may be hard-pressed to find any self-respecting statistician who'd jump to the conclusion of a 'trend', based upon two data points.
You might also want to quit now, while you've got any face, or credibility left to save.
Your may learn that your premise turns out to be indefensible.
I may indeed learn that my premise is indefensible - and I have never said otherwise.

What I have said, to repeat it ad nauseum for those who still cannot understand, is that the current evidence we have available for production BEVs shows that cooling drag, as a percentage of total aero drag, is not at all low.

I know it's a strange notion to some - but I'd rather go on measured evidence rather than theories I dream up.
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Old 04-28-2021, 10:23 AM   #14 (permalink)
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not at all

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Originally Posted by JulianEdgar View Post
I may indeed learn that my premise is indefensible - and I have never said otherwise.

What I have said, to repeat it ad nauseum for those who still cannot understand, is that the current evidence we have available for production BEVs shows that cooling drag, as a percentage of total aero drag, is not at all low.

I know it's a strange notion to some - but I'd rather go on measured evidence rather than theories I dream up.
Correct. Low for 'some'.
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Old 04-28-2021, 05:00 PM   #15 (permalink)
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Quote:
Originally Posted by aerohead View Post
Correct. Low for 'some'.
Low for the cars for which we have the measurement of cooling drag as a percentage of total aero drag.

If you have this data for any other cars, please post it.

So far, you haven't - posting reams of numbers that don't show this factor doesn't actually count, you know. As is your habit, it just muddies the water.
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Old 04-28-2021, 05:15 PM   #16 (permalink)
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measurement

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Originally Posted by JulianEdgar View Post
Low for the cars for which we have the measurement of cooling drag as a percentage of total aero drag.

If you have this data for any other cars, please post it.

So far, you haven't - posting reams of numbers that don't show this factor doesn't actually count, you know. As is your habit, it just muddies the water.
Each vehicle will embody information from which we'll be able to identify candidates for low cooling drag as a percentage of the total.
We won't need wait on SAE Papers which may, or may never avail themselves.
Every powertrain leaves a trail of bread crumbs.
And be careful about 'measurements.' Like the 911 Carrera. Very contextual. Dr. Wolf was careful to mention them. I didn't see you pick up on any of it.
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Old 04-28-2021, 06:40 PM   #17 (permalink)
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Quote:
Originally Posted by aerohead View Post
Each vehicle will embody information from which we'll be able to identify candidates for low cooling drag as a percentage of the total.
We won't need wait on SAE Papers which may, or may never avail themselves.
Every powertrain leaves a trail of bread crumbs.
Ok, you go on breadcrumbs. I'll go on published data of percentage cooling drag.
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Old 04-30-2021, 11:22 AM   #18 (permalink)
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published data

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Originally Posted by JulianEdgar View Post
Ok, you go on breadcrumbs. I'll go on published data of percentage cooling drag.
That's fine as long as you provide a full accounting of the total energy budget.
Dr. Wolf eludes to it.
You'll find that, for instance, the cooling drag of your pet 911 Carrera is, conditionally, remarkably higher than published. And without this additional drag you 'Chernobyl' the engine.
To arrive at this conclusion requires the trail of bread crumb accounting. Dr. Wolf can explain it better than I.
Porsche's official owner's manual for the Carrera will provide some of the necessary data required for the calculations. The rest will come from varied sources.
Track data for the car, say, from Laguna Seca, Willow Springs, or Road Atlanta, will provide insight into the non-passive, 'Track-mode' cooling requirements, mentioned, but not quantified in Dr. Wolf's presentation.
It is this data which will add a richer contextual experience for the reader.
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Old 04-30-2021, 04:29 PM   #19 (permalink)
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Quote:
Originally Posted by aerohead View Post
To arrive at this conclusion requires the trail of bread crumb accounting.
You keep counting your breadcrumbs, and I'll just go on published data of cooling drag as a percentage of total drag.

Facts don't change because Aerohead on Ecomodder develops a new theory.
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Old 04-30-2021, 04:48 PM   #20 (permalink)
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go on

Quote:
Originally Posted by JulianEdgar View Post
You keep counting your breadcrumbs, and I'll just go on published data of cooling drag as a percentage of total drag.

Facts don't change because Aerohead on Ecomodder develops a new theory.
Yes, unidimensional in an omnidimensional universe. Pure pedantic. Useless!

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