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Old 11-14-2020, 09:29 PM   #21 (permalink)
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Quote:
Originally Posted by ME_Andy View Post
Julian, please take a deep breath and DO NOT reply to my post.

We are lucky to have a template from (as I understand it) a retired professor. It's been useful in many cases. I'm sure it's not perfect for all cases but it's the best tool contributed so far.

I would welcome some input from somebody else about evidence or scientific basis behind the template.

Edit: here's the background for the template. https://ecomodder.com/forum/showthre...rt-c-9287.html

Now that disagreement has been expressed I hope we can move on.
Um, you didnít address even one of my specific criticisms of how the template is used here!

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Old 11-14-2020, 09:32 PM   #22 (permalink)
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I would like you to realize that your opinion has been expressed. The personal attacks should stop. Find something else to talk about. Is that unreasonable?
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Old 11-14-2020, 09:33 PM   #23 (permalink)
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Originally Posted by ME_Andy View Post
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I placed Sunraycer under the template,it was a perfect match.Bill Watson's airship "White-Dwarf" of 1984 is about 2.57:1 ratio. Watson worked with Burt Hibbs,aerodynamacist for Sunraycer. Both of AeroVironment. This shape seems to end up on some of the most efficient vehicles known in the world,I believe it to be a shoe -in for aero-modding.Those with more advanced aerodynamic toolbags will will no doubt venture out into some of the more exotic shapes,but for amateurs,I believe this form can serve us well.
Sure. Now apply it to a range of other solar cars and see that thereís no match whatsoever!

The debate has never been whether the template is a low drag shape. Itís one of at least five in the literature - all with quite different shapes.
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Old 11-14-2020, 09:38 PM   #24 (permalink)
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Originally Posted by ME_Andy View Post
I would like you to realize that your opinion has been expressed. The personal attacks should stop. Find something else to talk about. Is that unreasonable?
What personal attacks?

I am criticising the spreading of misinformation that is leading people astray. Or would you seriously rather that misinformation keeps being spread without being challenged?

Why donít you address the specific criticisms I have of the template approach? I listed them above.
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Old 11-14-2020, 09:43 PM   #25 (permalink)
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Quote:
Originally Posted by JulianEdgar View Post
What personal attacks?
This is a personal attack:

Quote:
I see Aerohead, completely undaunted, is back to spreading his misconceptions about his beloved template
Please move on.
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Old 11-14-2020, 10:55 PM   #26 (permalink)
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Quote:
Originally Posted by ME_Andy View Post
This is a personal attack:


Please move on.
Itís the literal truth!

So just confirm for me, you really would rather that misinformation from an individual goes unchallenged? Really?

If you think the template, as used here, is great, why not address my specific criticisms of it?
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Old 11-14-2020, 11:24 PM   #27 (permalink)
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OK, I'll watch the video.

0:23s : "apparently ideal shape" -- I've never seen anybody here claim that. The original description doesn't claim that.

2:10 : you're right, the template doesn't predict where the flow detaches to a high degree of accuracy. It's maybe 20cm off or so. Big whoop. Nobody claimed the template was perfect, it's an approximation. The original description even says, it should be useful for amateurs.

2:53 : "there's a small separation bubble at the rear of the window". Big whoop. Probably caused by the antenna.

4:41 "testing beats following every template" : yep, agree. If you have time to do so

7:54 The Sagitta and the Taycan look really close to the template to me. Not perfect.

In summary, the template isn't perfect. OK, great. What are we fighting about here?
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Old 11-14-2020, 11:29 PM   #28 (permalink)
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Quote:
Originally Posted by ME_Andy View Post
OK, I'll watch the video.

0:23s : "apparently ideal shape" -- I've never seen anybody here claim that. The original description doesn't claim that.

2:10 : you're right, the template doesn't predict where the flow detaches to a high degree of accuracy. It's maybe 20cm off or so. Big whoop. Nobody claimed the template was perfect, it's an approximation. The original description even says, it should be useful for amateurs.

2:53 : "there's a small separation bubble at the rear of the window". Big whoop. Probably caused by the antenna.

4:41 "testing beats following every template" : yep, agree. If you have time to do so

7:54 The Sagitta and the Taycan look really close to the template to me. Not perfect.

In summary, the template isn't perfect. OK, great. What are we fighting about here?
Here are my criticisms of how the template is used here:

It is claimed to allow you to:

- Show where there is separated and attached flow on existing cars
- Guide the shape of rear extensions
- Show how rear spoilers on sedans should be positioned and shaped
- Allow the assessment of the Ďaerodynamic purityí of cars

All these purported uses are simply rubbish!
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Old 11-14-2020, 11:30 PM   #29 (permalink)
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I agreed with you at permalink #18.




[crickets]

I think your aggrieved 'come at me bro' attitude is tiring. But.... The forum is pretty much dead except for this 'controversy' and The Lounge, so....
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Old 11-14-2020, 11:37 PM   #30 (permalink)
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I guess we have very different opinions on the meaning of "rubbish" and "approximation".

I don't mean to be a dick online. Have a good night (/day in Australia).

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