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Post by Professor Moriarty on Sept 7, 2018 15:03:51 GMT -5
Not as pretty or as easy as building one of Joe's. But, Joe challenged me. And, I needed something to distract me from all the ridiculous bad luck I've been having. I'm sure Laserman will find something wrong (I'm cool with that), but it won't be adding weight or paint on this one. Looking good Eagle! is that all balsa?
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Eagle
Goodfella
Posts: 2,228
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Post by Eagle on Sept 7, 2018 15:06:33 GMT -5
Everything but the tungsten and CA glue
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Eagle
Goodfella
Posts: 2,228
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Post by Eagle on Sept 7, 2018 15:45:44 GMT -5
Wasn't sure you would send me the one I really want, so I had to see if I could build one by hand. As you know the part you cannot see from the photos is the tough part. And, I decided to add a little more of a wave to mine. I'm most curious what the airflow comparison would look like.
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Post by Chuy on Sept 7, 2018 16:30:07 GMT -5
Well... It is my belief (and I think that Chuy concurs with this theory)... That it is better to well clear the wheel with the air and not allow the air to bump up against the wheel at all. I think that a little extra width is to be preferred over any hang nails for the air to drag on. With that being said... I plan on sending one of these designs out to Chuy to put in a side by side Pepsi Challenge against the clear X3 design that you were kind enough to polish up. Although the real world is always ready to prove me wrong, most designs I have seen benefit from keeping the air off the spinning tire by sacrificing a little bit of width. Look at NHRA dragsters and you will see that the fairing extends beyond the wheel.
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Post by Professor Moriarty on Sept 7, 2018 17:03:18 GMT -5
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Eagle
Goodfella
Posts: 2,228
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Post by Eagle on Sept 7, 2018 17:14:18 GMT -5
I'm not sure what the rules etc are for that class, but my guess is with all that HP they don't make the body that much wider for airflow.
There are other things that this car and NASCAR do like splitters that aren't really practical for PWD. But, I do have a design that would allow for some testing on that as well.
With PWD, because of gravity powered, there is a delicate balance between too much cross section and covering the wheels.
Least drag is best. Without the ability to print/machine multiple test subjects with only slight variances it will be difficult to see/calculate results.
That being said, I love visuals! So, I hope to see some soon.
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Post by Professor Moriarty on Sept 15, 2018 0:36:57 GMT -5
looks nice. Are the rear fenders still too wide? Seems like it too me. At least wood is easier to sand then the printed stuff. Hey Micro, Go guck yourself. link
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Post by micro on Sept 15, 2018 7:18:34 GMT -5
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