Lotus 79 underside

[Uwe]

I need picture from lotus 78,79,80 underside?

[hollus]

I am going to assume that you have done your googling, diagrams pop right up at you. Pictures, not so much.
And I am going to be cheeky and ask what is the context? Together with your other thread... there is clearly a project here. Of course you are free to share or not.

And now I am done being annoying, a bit of help:

You might deduce some floor shape from that sidepod, it is from here:
https://sportscardigest.com/lotus-type- ... g-an-icon/

You might also find what you need here:
https://paulsf1.wordpress.com/2012/03/0 ... rt-part-1/
It is a multipart post. The guy is PaulB in this forum and has posted unbelievably detailed car model constructions before. He is inactive since this February, but you might want to shoot him a private message. His level of research and documentation are only comparable to his manual skills.

[Uwe]

I am going to assume that you have done your googling, diagrams pop right up at you. Pictures, not so much.
And I am going to be cheeky and ask what is the context? Together with your other thread... there is clearly a project here. Of course you are free to share or not.

And now I am done being annoying, a bit of help:
https://i0.wp.com/s3.amazonaws.com/scar ... .jpg?ssl=1
You might deduce some floor shape from that sidepod, it is from here:
https://sportscardigest.com/lotus-type- ... g-an-icon/

You might also find what you need here:
https://paulsf1.wordpress.com/2012/03/0 ... rt-part-1/
It is a multipart post. The guy is PaulB in this forum and has posted unbelievably detailed car model constructions before. He is inactive since this February, but you might want to shoot him a private message. His level of research and documentation are only comparable to his manual skills.

Yes I working at race car,must produce max downforce as possible with underside,so I am interest what is best solution..flat+diffuser,wing section,half venturi shape etc...

I am looking for inlet shape,throat length,shape and fore/aft position.
I cant afford wind tunnel test, so I dont know in which direction start project of max donwforce for given car..

I can only meassure donwforce with height indicator at suspension

[Testdrive]

Ironically I came across this today.

Aerodynamic downforces on F1 racing car at 150 mph for the Lotus 79

1780NM downforce in the middle.

https://www.invetr.com/dynamics-and-per ... t-150-m-ph

[JordanMugen]

Yes I working at race car,must produce max downforce as possible with underside,so I am interest what is best solution..flat+diffuser,wing section,half venturi shape etc...

I don't think using the Lotus 78 as a guide is the best solution, it's extremely out of date!

You'll want to make sure you have vortex generators at the leading edge, even if it just some pieces of angled piece of aluminium sheet, and you will probably not want to be too ambitious with the inlet or exit volumes (or angles) as else it will stall and not work, probably better to err on the side of caution.

You can use three-dimensional contraction and expansion to your benefit, which the Lotus 78 didn't use.

There are some basic plots of diffuser angle and ride height effects in the Katz race car aerodynamics textbook or in some other readily available papers I think.

[JordanMugen]

Ironically I came across this today.

Aerodynamic downforces on F1 racing car at 150 mph for the Lotus 79

1780NM downforce in the middle.

https://www.invetr.com/dynamics-and-per ... t-150-m-ph

1780 Newtons? That's only ~178 kgf.

[jjn9128]

Ironically I came across this today.

Aerodynamic downforces on F1 racing car at 150 mph for the Lotus 79

1780NM downforce in the middle.

https://www.invetr.com/dynamics-and-per ... t-150-m-ph

1780 Newtons? That's only ~178 kgf.

I've seen 700kg quoted for the Lotus 78 at 160mi/hr.