I think it can be legal if the open section is either NACA-ducted, or sits in the bulkhead area between 0mm and 150mm ahead of the front wheel centre line. Essentially any hole running like this:PhillipM wrote: ↑16 May 2018, 16:53The other thing I've been trying to see but we haven't had a clear photo of all weekend, is whether any of those ducts are blowing into the vertical fin that holds the cape - as it tapers in a 'v' from front to back, is it legal to have the back of that open?
(I'm thinking it would help accelerate flow around the side of it)
There are some glaring errors with that explanation.proteus wrote: ↑16 May 2018, 20:14This is from Autosport, but it doesnt explain the middle very well:
https://www.youtube.com/watch?v=3Ho0KVIYMbk
Thank u for youre comment and explanation. I really enjoyed reading it, i am not the sharpest tool in the shed about aerodynamics, so i really appreiciate youre knowledge and understanding of it. So again, thank u very muchtrinidefender wrote: ↑16 May 2018, 23:13There are some glaring errors with that explanation.proteus wrote: ↑16 May 2018, 20:14This is from Autosport, but it doesnt explain the middle very well:
https://www.youtube.com/watch?v=3Ho0KVIYMbk
Firstly while yes a vortex might form at the edges of the sides of the cape due to the lower pressure below and higher pressure above, it won't be a very strong vortex. Primarily due to the fact that there won't be that much of a pressure gradient. There isn't much of a curve below the cape to increase airflow velocity and drop the pressure.
Secondly, people keep comparing this to the Mercedes concept when in actuality they are quite different. The key difference being the direction that the vortex (if this cape even creates one of any substance) rotates.
On the Mercedes, the cape has the pieces at the very front which purposefully trip the airflow into a vortex. The higher pressure below rolls onto the top into a vortex as shown in the picture of the F-18.
https://cdn.pbrd.co/images/HiqUTlg.jpg
http://www.lerx.net/Arbre/Lerx/Data/FA18D%20LERX.jpg
http://rumourcontrol.com.au/wp-content/ ... chell.jpeg
As you can see looking at that picture on the left side the vortex is clockwise, on the right, it is counterclockwise. On the McLaren setup if there is a vortex, looking at the nose from the front, on the left the vortex would roll counterclockwise on the left and clockwise on the right.
The reason why this detail is so important is the inside vortices coming off of the front wing. On the Mercedes they will be co-rotating and on the McLaren they will be counter-rotating. Co-rotating vortices gain strength, counter-rotating tend to cancel each other out. Considering how close together they are and the front wing vortex being much stronger, I wouldn't be surprised if it cancels out any vortex created by the horizontal section of the cape
I'm pretty sure the cape (and the rest of the nose) is more about setting up airflow for the rest of the car rather than providing its own downforce component.
Really? It looks to me like the wide centre outlet is split three times. I can see a shadow about 1/3 along on the left which looks like where it is split ever so slightly set back... so the central duct and inner ducts of the outer ducts go to the middle, with the outer-outer ducts going to the edges... if that makes sense...turbof1 wrote: ↑17 May 2018, 23:38So based on the confirmed outlets, kudos to Piola having those exits so accurate from to get go, I revised my idea of the ducting. So jjn9128, I don't think they actually split the side ducts, but I do believe they make an X-section:
http://u.cubeupload.com/turbof1/XDucts.png
I could make the turn more fluent, yes. Let me give it a shot, one moment.jjn9128 wrote: ↑18 May 2018, 00:12Really? It looks to me like the wide centre outlet is split three times. I can see a shadow about 1/3 along on the left which looks like where it is split ever so slightly set back... so the central duct and inner ducts of the outer ducts go to the middle, with the outer-outer ducts going to the edges... if that makes sense...turbof1 wrote: ↑17 May 2018, 23:38So based on the confirmed outlets, kudos to Piola having those exits so accurate from to get go, I revised my idea of the ducting. So jjn9128, I don't think they actually split the side ducts, but I do believe they make an X-section:
http://u.cubeupload.com/turbof1/XDucts.png
What you're suggesting would be quite a sharp turn... I would have thought the loses would make the ducting quite inefficient. I think you'd also see that difference in angle on the head on shot!
It's all wrong. Try again..turbof1 wrote: ↑17 May 2018, 23:38So based on the confirmed outlets, kudos to Piola having those exits so accurate from to get go, I revised my idea of the ducting. So jjn9128, I don't think they actually split the side ducts, but I do believe they make an X-section:
http://u.cubeupload.com/turbof1/XDucts.png
I did already. Spot the 10 differences .PlatinumZealot wrote: ↑18 May 2018, 06:22It's all wrong. Try again..turbof1 wrote: ↑17 May 2018, 23:38So based on the confirmed outlets, kudos to Piola having those exits so accurate from to get go, I revised my idea of the ducting. So jjn9128, I don't think they actually split the side ducts, but I do believe they make an X-section:
http://u.cubeupload.com/turbof1/XDucts.png