F1technical.net

Juzh wrote:

djos wrote:

andone89 wrote:https://scontent-lhr3-1.xx.fbcdn.net/t3 ... 5679_o.jpg This poped up today. This suggests no beam wing, but doesn't say anything about the tilt of the rear wing.
But WOW, the diffusor height will be almost doubled!

Dam that diffuser is much bigger, about time we got decent size ones back in F1!

The other interesting thing I notice in the drawing is how much further away from the centerline the mirrors are mounted.

It makes complete sense but I wonder what cool tricks the teams will get up to with those long stalks they'll need.

175mm is what's been used in 2009-2010, so that's not unheard of. What's more interesting is the length of it, which is also getting elongated. I'm not sure of exact numbers.

https://www.formula1.com/content/fom-we ... 398641.jpg

This could also have a big impact.

The diffuser will start 175mm ahea of the rear axle. (Currentrly starts at the rear axle. ) And its width will increase by 50 mm to 1050 mm.

This is probably the most importannt rule change for teams in 2017 aerodynamic performance wise.



Green = 2017, Purple=2016

So total available diffuser volume goes from 21875 cm³ to 39046.875 cm³. Almost doubled.

Which means we might be back to the days of cars not running almost as much downforce as they can bolt on and instead having some proper low and high drag wing setups.

It also means we might still see top speeds matching this year as the extra tyre and underbody grip will mean people running less downforce from the wings, etc.

PhillipM wrote:Which means we might be back to the days of cars not running almost as much downforce as they can bolt on and instead having some proper low and high drag wing setups.

It also means we might still see top speeds matching this year as the extra tyre and underbody grip will mean people running less downforce from the wings, etc.

Exactly. Things like monkey seats might become very circuit dependent again. Especially since rear wing and diffuser will more then likely again be able to work properly in tandem.

Moreover, circuits like Monza might infact give higher topspeeds because of 2 reasons:
-The more efficient downforce from the underbody will allow to have downforce, and drag, to be taken away somewhere else.
-Due the larger bargeboards, front wings will not have to manipulate the flow as much rearwards. What we saw the last few years was that front wings still had relative high angles of attack on Monza, especially outboard. Again, that might change now.

On the other hand, larger wheels will mean more blockage still.

Paul wrote:On the other hand, larger wheels will mean more blockage still.

Yes. Although this has been quite compensated by the larger front wing (acting more as getting the air around the tyres), it will undo atleast partly the gains in efficiency.

PhillipM wrote:Which means we might be back to the days of cars not running almost as much downforce as they can bolt on and instead having some proper low and high drag wing setups.

This has also been said by Pat Symonds in a recent interview. He said teams nowadays would bring max DF to almost all tracks, except for a few of them like monza, spa. He also said how it's gonna be a lot different next year.

It would be great to see some low-drag set-ups next season. Something like the Williams-Judd FW12 would be cool (yes, I know it would be illegal in 2017!):



or the Williams FW19:

dobbster71 wrote:It would be great to see some low-drag set-ups next season. Something like the Williams-Judd FW12 would be cool (yes, I know it would be illegal in 2017!):

or the Williams FW19:

Wow, that looks like an Indy 500 qually setup! I'd forgotten just how much they used to change for Monza!

turbof1 wrote:So total available diffuser volume goes from 21875 cm³ to 39046.875 cm³. Almost doubled.

How should I interpret that to get a feel for the likely performance change?

My current guessodology is to assume that the floor based performance improvement will be proportional to the increase in diffuser exit area multiplied by the increased floor width.

For the area I take the diffuser down to the ground. If I assume a ride height of 60mm the diffuser area increases 30%. The floor is 14% wider. So floor downforce increases 48%.

Willem Toet's 2009 downforce distribution diagram gives the floor contribution to downforce as 52%. Since this was with a beam wing we need to reduce that. If it is now 40% total downforce rises 19%, if 30% it rises 14%.

So if they can get the floor to work similar to now downforce is likely to rise a lot.

henry wrote:

turbof1 wrote:So total available diffuser volume goes from 21875 cm³ to 39046.875 cm³. Almost doubled.

How should I interpret that to get a feel for the likely performance change?

That's a complex answer I am completely underqualified to answer .

My current guessodology is to assume that the floor based performance improvement will be proportional to the increase in diffuser exit area multiplied by the increased floor width.

For the area I take the diffuser down to the ground. If I assume a ride height of 60mm the diffuser area increases 30%. The floor is 14% wider. So floor downforce increases 48%.

Willem Toet's 2009 downforce distribution diagram gives the floor contribution to downforce as 52%. Since this was with a beam wing we need to reduce that. If it is now 40% total downforce rises 19%, if 30% it rises 14%.

So if they can get the floor to work similar to now downforce is likely to rise a lot.

I think those are quite sensible numbers. We are likely to see shallower rear wings, meaning floor and diffuser will percentage-wise be bigger by that alone.

Saykas wrote:http://www.gpupdate.net/en/f1-news/3470 ... 17-design/

that looks pretty accurate imo. But not eye-pleasing.
the side pods won't be that fat imo.
and nose will still have penis extension if possible reg. wise.

Sadly no tunnels are allowed.

FrukostScones wrote:

Saykas wrote:http://www.gpupdate.net/en/f1-news/3470 ... 17-design/

that looks pretty accurate imo. But not eye-pleasing.
the side pods won't be that fat imo.
and nose will still have penis extension if possible reg. wise.

Rear of the car is completely undeveloped in that picture. this is far from what we'll see come melbourne.