Internal Body Aerodynamics

[ame]https://www.youtube.com/watch?v=pk8ZrN__nmA[/ame]
 
[ame]https://www.youtube.com/watch?v=sk4s3cRuhD0[/ame]

Recent, but no aero detail discussion.
 
YouTube AI just keeps suggesting videos.

Great graphics, focus on aero.

[ame]https://www.youtube.com/watch?v=QVRCqLRgZRQ[/ame]
 
AI -- I gotta just crawl the InterWeb...

Here is a useful graphic from Dr. ING S.F. Hoerner. Compares the aft section drag coefficients that (by analogy) fit the Corvette (a bit):
12695c5c2d55256b8.jpg

Found that version in Japan.

Now this from Sophia University FSAE team (in Japan) shows using an Air Curtain (well, really a splitter End Plate) to influence underbody downforce:

12695c5c2e4b84656.jpg

Me LIKE! I COPY this!

Cheers - Jim
 
AI -- I gotta just crawl the InterWeb...
Me LIKE! I COPY this!

Cheers - Jim

I'm assuming YouTube uses AI. If you create an account and login, it remembers your search/watch history. Then, whenever you open or refresh the main page it recommends videos. I get a lot of newly released videos that way.
 
NAHH - It's the NSA, just baiting us...
I do get a heap of music loaded that way. Just guessed it was some tracking of "favorites" algorithm. Guess that qualifies as AI. I thought maybe you had a search engine squired away.
 
Not really applicable, but pretty cool.

[ame]https://www.youtube.com/watch?v=xjsUwFHQbWo&app=desktop[/ame]


[ame]https://www.youtube.com/watch?v=qXKQezyl2Oo&app=desktop[/ame]
 
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[ame]https://www.youtube.com/watch?v=vPgPipm9rFA&app=desktop[/ame]
 
[ame]https://www.youtube.com/watch?v=vGYjrbZ9hqs&app=desktop[/ame]
 
Fairly recent, and he spends some time pointing out some aero features.


[ame]https://www.youtube.com/watch?v=yEGth4SKv-c&app=desktop[/ame]
 
Under-Hood Internal Aerodynamics

"Return with us now..."
One way to lower internal drag would be keep the air out of the engine bay. With a "boxed radiator" to improve its flow, vented outside the engine bay, there would still be air from underneath the engine to eliminate. An oversized "Skid Plate" could help - but heat in the bay still a concern.
12695c5ebe30b9b9b.jpg
With louvers, air could be pulled from the bay - at speed, but some fan setup would be needed when stopped. Digital temp gauges are pretty cheap, as are some stainless steel louvers.
12695c5ebe30d655e.jpg
If you're into electronics the fan(s) could be setup to run at a set temp.
Seems like a worthy experiment. I'll put it on my ever growing list of 2-Dos.
Hi Ho Silver!
 
"Return with us now..."
One way to lower internal drag would be keep the air out of the engine bay. With a "boxed radiator" to improve its flow, vented outside the engine bay, there would still be air from underneath the engine to eliminate. An oversized "Skid Plate" could help - but heat in the bay still a concern.

If you're into electronics the fan(s) could be setup to run at a set temp.
Seems like a worthy experiment. I'll put it on my ever growing list of 2-Dos.
Hi Ho Silver!

With my plan to "belly pan" my car, I have thought alot about a sealed engine compartment and the heat generated by headers and such... The louvers are a good idea but like you said only work at speed. Temperature operated fans are a good idea, but something powerful enough to move enough air is going to be heavy (and where to mount it??) Im going to experiment with some simple vents in the hood to see if the natural tendency of hot air to rise will self evacuate and keep underhood temps reasonable.

All thoughts that wont happen for another year considering the current state of my car though :skeptic:
 
All thoughts that wont happen for another year considering the current state of my car though :skeptic:

Ditto, my friend. But I think at last I'm settling in on a wheel tire combo. So soon a "roller."
I'm gonna try the pan under engine - and thermostat fan(s). Also want to Jet-Hot the headers too - may push some heat out of the bay and down the tailpipe - so they say...:search:

Cheers - Jim
 
External Aerodynamics, but adaptive, so kind of interesting.


[ame]https://www.youtube.com/watch?v=D6YEXumFqZE[/ame]
 
On second look - what are they trying to accomplish? Load the inside tire - makes sense, roll the chassis to help that effort - makes sense, but there must be simpler means - thinking the Porsche dual rear elements - (I owe a post of that too.)

But in any case -- That is WILD

But I already said: WHUT! when I saw this one:
[ame]https://www.youtube.com/watch?v=1wmp4I0pShY&list=PL5_EsQr7eMvFJQuZm2i3Ba1_JDUrB6-hy&index=8[/ame]

It works - in spite of being sort of "Red Neck" aluminum siding?
Gotta' have that canard steer for real effect.
Cheers - Jim
 
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so here are some of the ones I owe -
Porsche 908 -
[ame]https://www.youtube.com/watch?v=rNor06VRwJQ[/ame]

and about half way through this video they get some track time:
[ame]https://www.youtube.com/watch?v=QT1Aj5bu9t8[/ame]

ARDUINO anyone?

Cheers - Jim
 
Revisit the early C3s

Here is something that has been brewing a while in the "eco-mod" world. Finally making mainstream:
12695c6497c72404d.jpg

Ready for the 68-77 mods?

In fact could be better flow than the GM 78 that has some areas of "less than optimum," given over for "style."


Cheers - Jim
 
This is from 2017. But, I am not up on this so was impressed by all the small details. They show the old aero, highlight it, and then show the new mods.

[ame]https://www.youtube.com/watch?v=geq2e5YPXcs&app=desktop[/ame]
 
GO to 4:30 to see the aero features. Pretty much what other big $$ cars are doing. Plus, rear deck exhaust outlet.

[ame]https://www.youtube.com/watch?v=LyXcS0vGNdM[/ame]
 
Regarding Jim's thought on venting the engine compartment with a "boxed radiator" ...
Oddly enough I had two new trucks in my shop with the front grilles removed, both had active aero grille shudders. I didnt have any time to test them electronically, but watching their movement my guess is that they are controlled with stepper motors. Using a engine compartment temp sensor and a vehicle speed sensor, a simple code could be written to control the shudder position. For a full belly pan'd car Im picturing this unit being mounted directly under the engine.
At high speeds, but low load (ie: highway cruising) the vents could be totally closed for max efficiency. As load and heat increase the vents could open at the rear to vent the underhood air. And low speeds (traffic, or low speed autocross maybe?) where the engine compartment temp is high from lack of airflow, the vents could be opened to create a ram-air effect.
Surely this could be implemented anywhere on the car, but this is where my head is at currently :shocking:

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