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  #401  
Old 12-23-2020, 01:36 PM
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I believe they are basically centrifugal compressors. Early and/or cheap centrifugal compressors had/have straight vanes.

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I am guessing he found a stainless salad bowl approximately the right size and went from there.

We had a thread on the original alloy fans, I seem to remember they were flat on the front, but alloy would support a lot more torque. It was just uploaded, so it will be interesting if he gives an update later.


Found it:

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Last edited by rtj; 12-23-2020 at 01:48 PM..
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  #402  
Old 12-23-2020, 01:55 PM
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Quote:
Originally Posted by rtj View Post
I believe they are basically centrifugal compressors. Early and/or cheap centrifugal compressors had/have straight vanes.

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I am guessing he found a stainless salad bowl approximately the right size and went from there.

We had a thread on the original alloy fans, I seem to remember they were flat on the front, but alloy would support a lot more torque. It was just uploaded, so it will be interesting if he gives an update later.


Found it:

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I still don't think that does anything other than churn air. Its not even centrifugal, and if it was, its backwards. This is from the link you provided:

Impellers are designed in many configurations including "open" (visible blades), "covered or shrouded", "with splitters" (every other inducer removed) and "w/o splitters" (all full blades). Both Figures 0.1 and 3.1 show open impellers with splitters. Most modern high efficiency impellers use "backsweep" in the blade shape.[6][18][19]

Euler's pump and turbine equation, plays an important role in understanding impeller performance.

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  #403  
Old 12-23-2020, 08:44 PM
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Prochargers had radial blades for a long time I believe (economy models). Found a p600 photo here: [Only registered and activated users can see links. Click Here To Register...]

You want a limited amount of flow, as flow requires power. So inefficient straight blades might be good enough. Plus, too much load might damage the light weight wheel fan.

“radial blade centrifugal fan“ this search gives lots of images.

Last edited by rtj; 12-23-2020 at 09:00 PM..
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  #404  
Old 12-25-2020, 02:30 PM
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If you've poured a cup of 'nog, here is a sleigh that would delight any Santa.

This Ferrari looks vaguely similar (well a bit) to the C8 but less angular and maybe a bit more front end from the concept days:

I bring it to the thread as there is a very interesting bit that is clearly applicable to early model C3s (Note the "helper" airfoil that could be mounted just aft of the T-Top between the C3 flying buttresses - a better position than my sketch in a previous posting):

The article is from last year, but features a number of very interesting aero features and each is highlighted and I won't blather on about them all. But, this is an interesting approach on the rear:

The wing is in an area to expect clear air, and mounted on top of the spoiler/slot gets the added "boost" of being in a "ground effect" from the spoiler surface. Sort of almost like a bi-planer setup.

A good shot of both features at once:

Overall-some very sexy curves and another example of what can be done is you can spare no expense!

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As an aside the Lotus Evija (electric) shares some similar flow-schemes:

From an INTERNAL BODY AERODYNAMICS perspective - the above diagram show the concept of "porosity" that was seen in the Bugatti earlier.

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It is described as a car that; “...literally breathes the air”. They say the focus has been on balancing downforce, lift, and stability. They also say the secondary focus is drag - and they have yet to release those numbers (I haven't found anyway.) But, with 2000HP, drag is not much to overcome!

Cheers - Jim
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Last edited by phantomjock; 12-26-2020 at 10:04 PM..
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  #405  
Old 12-26-2020, 02:38 PM
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Thatís pretty neat, nice aero vid. I never realized until now that high performance electric vehicles needed cooling, but it makes sense that in addition to low drag and high down force, they also have to cool properly.

One more, but the one thing on this car that stood out was how they try to clean up the flow off the front wheels. Jump to 8:00 if you get tired of him talking.

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  #406  
Old 01-03-2021, 02:51 PM
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More realistic or real world cars in these two:

Low budget(but informative):

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Big buget!

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I always liked flow vis.
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  #407  
Old 01-03-2021, 03:01 PM
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Some good internal aero discussion in this one. This Porsche channel looks good, but I wonít post many more.


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  #408  
Old 01-09-2021, 01:16 PM
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  #409  
Old 01-15-2021, 12:51 AM
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Here is graphic evidence of the downforce that the Viper ACR's wing produces. Start watching from 1:50.

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  #410  
Old 01-16-2021, 06:33 PM
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I always wanted an ACR and drove down to Miami to look at a low mileage car. Just hesitated long enough and life changed .

Great video, that really put the rear down fast.

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This photo is from the video Ozgreen posted and looks similar to the jegs part at the link. Greenwood tribute car by Hendricks.



Another.
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Last edited by rtj; 01-16-2021 at 06:38 PM..
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  #411  
Old 01-31-2021, 01:57 PM
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At 3:00-5:00 he discusses aero. He explains the dimples. I thought they were passive from the other video, deploying on their own due to low pressure (don’t know why), but it appears to be active.

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  #412  
Old 02-07-2021, 04:36 PM
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  #413  
Old 02-07-2021, 04:36 PM
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Enormous fender vents.

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  #414  
Old 02-17-2021, 05:27 PM
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Pretty interesting, amazing how a CF wing with foam core is so strong.

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  #415  
Old 02-18-2021, 02:46 AM
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^^^^^^^^^

Pretty amazing. But I had to laugh - with all that hi-tech equipment, when it came time to test the strength of the wing they used a foose ball table to support one end.
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  #416  
Old 02-18-2021, 10:18 PM
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Yes mfain, kind of an interesting video, some sort of startup business.

This carbon fiber wing below, is pretty unbelievable. I guess when your r&d budget is huge, anything is possible.

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Last edited by rtj; 02-18-2021 at 10:25 PM..
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  #417  
Old Today, 05:46 PM
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Lots of engine setback allows rad ducts in the camaro. Heís got the swan neck supports on his wing.


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