Scuderia Ferrari SF72H Speculation Thread

[aral]

Information on surface coatings is , of course, interesting. but remember, there are two types of matt paint. one is teflon based where it provides a nonstick finish, which can prevent build up of debris during a race. in fact, a number of teams have been using teflon tape to prevent build up on front wings. the other type of matt finish is the one which has a slight texture and is designed to disrupt the boundary layer, getting air away from the skin. alas, we do not know which way (if any) ferrari are going, as yet.

[Sevach]

https://www.motorsport.com/f1/news/ferr ... t/4334541/
Speculation on the stacked exhaust.
Multiple grains of salt... but...

[.poz]

It's a mistyping. Article speaks about an experimental A320.
Furtherly, I remember some papers about a rough coating advantages in last monohull America's Cup boats, always reporting a tight relation with shark skin behaviour also at low speeds. The same for some military applications (SSBNs).

Yes it was a typo. Anyway i doubt they can create shark skin riblets with a paint. A rough coating can create a similar effect but to get a real benefit you need a specific crafted surface not just some paint

But i also find this googling around

[PlatinumZealot]

Paint that reduces the boundary layer length would have the best use under the floor of the car. It would be an absolute no-brainer! Teams wouldn't even bother wasting time to paint the top of the car with it.

[PlatinumZealot]

https://www.motorsport.com/f1/news/ferr ... t/4334541/
Speculation on the stacked exhaust.
Multiple grains of salt... but...

The trick with the double stacked wastegate pipes is that the lower one of them is a dummy. No exhaust flows throught it. All the dumped exhaust flows through the top one so the velocity near doubles. And since it is now closer to the bottom of the rear wing you get s stronger effect.

[bosyber]

https://www.motorsport.com/f1/news/ferr ... t/4334541/
Speculation on the stacked exhaust.
Multiple grains of salt... but...

The trick with the double stacked wastegate pipes is that the lower one of them is a dummy. No exhaust flows throught it. All the dumped exhaust flows through the top one so the velocity near doubles. And since it is now closer to the bottom of the rear wing you get s stronger effect.

Interesting, that's the first time I read a solid reason why it would make an actual difference. How do you know about it?

[Gilles27Kimi7]

https://www.motorsport.com/f1/news/ferr ... t/4334541/
Speculation on the stacked exhaust.
Multiple grains of salt... but...

The trick with the double stacked wastegate pipes is that the lower one of them is a dummy. No exhaust flows throught it. All the dumped exhaust flows through the top one so the velocity near doubles. And since it is now closer to the bottom of the rear wing you get s stronger effect.

Couldn't they just use a single waste gate to the same effect?

[Polite]

https://www.motorsport.com/f1/news/ferr ... t/4334541/
Speculation on the stacked exhaust.
Multiple grains of salt... but...

The trick with the double stacked wastegate pipes is that the lower one of them is a dummy. No exhaust flows throught it. All the dumped exhaust flows through the top one so the velocity near doubles. And since it is now closer to the bottom of the rear wing you get s stronger effect.

Couldn't they just use a single waste gate to the same effect?

two tubes are mandatory by regulations.
I think here is only a matter of weight savings: one pipe is so short.

[F1NAC]

The trick with the double stacked wastegate pipes is that the lower one of them is a dummy. No exhaust flows throught it. All the dumped exhaust flows through the top one so the velocity near doubles. And since it is now closer to the bottom of the rear wing you get s stronger effect.

Couldn't they just use a single waste gate to the same effect?

two tubes are mandatory by regulations.
I think here is only a matter of weight savings: one pipe is so short.

you can use single

Engine exhaust systems must have only a single turbine tailpipe exit and either one or two
wastegate tailpipe exits which must all be rearward facing and through which all exhaust gases
must pass

[wesley123]

This second pipe allows the wastegate exit to be higher up.

[Maritimer]

Bigger pipe would lead to lower velocity as well no? Kinda negates the point of stacking like that for blowing.

[pantherxxx]

Ferrari insider: “Data coming from the simulator is encouraging”
Latest reports on Ferrari 2019 car

The well-known Formula One blogger and insider Leo Turrini, who is notoriously close to anything that has to do with Scuderia Ferrari and is actually considered the unofficial voice of the Maranello team, reports on the latest news regarding the development of Scuderia Ferrari’s 2019 Formula One car, which will be revealed on February 15. Here are some of the most important points indicated by the famous Italian blogger and journalist Leo Turrini on his quotidiano.net blog:

– at the Ferrari factory in Maranello the general atmosphere is full of hope. The data coming from the simulator is encouraging but Ferrari CEO Louis Camilleri and Team Principal Mattia Binotto do not want to go as far as to say that the Scuderia have the strongest car ahead of the 2019 Formula One season.
– Italian Formula 1 engineer Riccardo Adami will continue to work with Sebastian Vettel, as for Charles, he is getting Jock Clear as his race engineer.

– regarding the team structure at Scuderia Ferrari: sporting director Laurent Mekies will also take the role of a “rules officer” which means he will look at the gray areas in the F1 rule book and their interpretation. He came from the FIA which can represent an advantage.

source: http://scuderiafans.com/ferrari-insider ... v82POZQevk

[godlameroso]

Bigger pipe would lead to lower velocity as well no? Kinda negates the point of stacking like that for blowing.

The wastegate exits have to be sized accordingly to not be a bottleneck otherwise it won't be able to divert enough gas from the turbine, and you get boost creep.

[Sevach]

https://www.motorsport.com/f1/news/ferr ... t/4334541/
Speculation on the stacked exhaust.
Multiple grains of salt... but...

The trick with the double stacked wastegate pipes is that the lower one of them is a dummy. No exhaust flows throught it. All the dumped exhaust flows through the top one so the velocity near doubles. And since it is now closer to the bottom of the rear wing you get s stronger effect.

Interesting, that's the first time I read a solid reason why it would make an actual difference. How do you know about it?

I believe him, the design is to make the lower one just a small "intersection" out of the top one, only the top one is directly connected to the wastegate itself.

[Tzk]

Regarding the dummy pipe:
Ferrari tested this solution last season and there were pictures of a single pipe starting on the wastegate exit and splitting into the two stacked wastegate pipes. One could see that the upper pipe was actually connected straight to the wastegate outlet, while the lower pipe had a 90deg bend where it got connected to the upper pipe.

So the pressure drop on the lower pipe should be bigger than on the upper pipe. Hence the main flow is going through the upper pipe.