Ferrari revolutionise wheel aero 8 Jul 2007
Ferrari have once again developed a new rim cover, but this time it has been so thoroughly developed that it doesn't rotate with the wheel any more. The new cover is fitted inside the front wheel to help brake disk cooling. The assembly comes with a newly developed wheel nut (see left image). The nut consist of a central, silver coloured part that does not rotate and is fixed to the wheel axis. Around it is a blue part that does rotate with the wheel. When the fronts wheels are now changed during a pit stop, the carbon rim cover comes off with the nut as one part. After a new tyre is fitted, the wheel nut is again put on with the help of a specially developed screwer to ease handling for the pit crew.
The new system is ingenious in a way that it allows for the cooling exit (opening in lower left of right image) can stay at the same location all through the lap and hereby increase brake cooling and wheel aerodynamic efficiency. The fixed location meanwhile also has the benefit that it washes away earlier protests of rivalling teams who claim that the wheel covers (the ones that rotate with the wheel itself) are forbidden moveable aerodynamic devices.
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| scarbs |
 Posted: Fri Jul 06, 2007 12:15 pm |
Professional Joined: Wed Oct 08, 2003 8:47 am Posts: 780 Location: Hertfordshire, UK |
Silverstone Friday practice. It looks like Ferrari are going to run their static wheel fairings.
Lets get ready fo the protests.... Scarbs... Note: there is no wheel retention system on the hub, as its attached to the fairirng\wheelnut. The special wheel guns have bene seen in the pit too...  |
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| siskue2005 |
Posted: Fri Jul 06, 2007 1:22 pm |
 Talent  Joined: Fri May 11, 2007 8:50 pm Posts: 214 Location: India |
here is the wheel gun....can anyone explain, how it works?
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| manchild |
Posted: Fri Jul 06, 2007 2:46 pm |
 Master  Joined: Fri Jun 03, 2005 9:54 am Posts: 4542 |
The one with large plate is for wheels with CF cover - enabling mechanic to attach it to nut properly and perhaps it blows some compressed air into the rim to cool off discs during pit stop.
Over 123.000.000 animals killed daily, over 5.000.000 animals killed hourly, over 85.000 animals killed every minute. While you read this over 40.000 animals was killed. www.goveg.com |
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| Sawtooth-spike |
Posted: Fri Jul 06, 2007 3:17 pm |
 Professional Joined: Fri Jan 28, 2005 2:33 pm Posts: 890 Location: essex |
Sorry got way to tempted,
They really should not give me days off! Ferrari new Cooling system (its really part of the braking system.... Honest!) and new nose ballast (Helps with the problems of following other cars) 
I think Scarbs is right i think some teams might say something, but then again nobody did anything about the frezbes on the rear (well other than you manchild who was ready to go to war) |
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| dp35 |
Posted: Fri Jul 06, 2007 11:43 pm |
Member Joined: Tue Nov 14, 2006 11:58 pm Posts: 67 |
How are these wheel covers attached?
The only way I can think of is with a small shaft that would have to run through the center of the axle. This would not be possible on the rears. |
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| RJC_pt |
Posted: Sat Jul 07, 2007 12:19 am |
Rookie Joined: Fri May 18, 2007 8:59 pm Posts: 27 Location: Braga, Portugal |
Well they could be fixed to the rim by a bearing and have the side that allways points down with a little balast, that would ensure it doesnt rotate.
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| Downforce |
Posted: Sat Jul 07, 2007 12:47 am |
 Rookie Joined: Fri Feb 10, 2006 12:17 am Posts: 38 Location: Belgrade, Serbia |
This is the best picture that I was able to find...
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| manchild |
Posted: Sat Jul 07, 2007 3:01 am |
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Master Joined: Fri Jun 03, 2005 9:54 am Posts: 4542 |
It there's a weight holding that plate in specific position than it is movable ballast because it is not firmly attached. 
If however it rotates than since it is asymmetrical it works as fan which is also i..... Over 123.000.000 animals killed daily, over 5.000.000 animals killed hourly, over 85.000 animals killed every minute. While you read this over 40.000 animals was killed. www.goveg.com Last edited by manchild on Sat Jul 07, 2007 4:06 pm, edited 1 time in total. |
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| manchild |
Posted: Sat Jul 07, 2007 4:05 pm |
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Master Joined: Fri Jun 03, 2005 9:54 am Posts: 4542 |
That front "ducting" is a two part system consisting from inner CF ring glued to rim while rim cover is attached to wheel nut. When replacing tyres rim cover goes off the wheel together with the nut and than gets back on wheel when nut is screwed.
Am I right? Has anyone seen tyre change detail? I guess that rim cover stays still on an additional bearing over the wheel nut while the only mystery remains what keeps rim cover in one position. The logic tells us that it is the weight but could it also be the aero shape from the inside (the thing we don't see?). Over 123.000.000 animals killed daily, over 5.000.000 animals killed hourly, over 85.000 animals killed every minute. While you read this over 40.000 animals was killed. www.goveg.com |
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| checkered |
Posted: Sun Jul 08, 2007 12:10 am |
 Professional Joined: Fri Mar 02, 2007 1:32 pm Posts: 948 |
On the official F1
website the resident tech reporter Paolo Filisetti suggests that the 27 degree aperture in the cover directs airflow under the car (or helps direct more air under the car, there's a slight difference and I'm not entirely sure which way it is), increasing downforce. Therefore it has next to nothing to do with the rear tyre rim shields. No word on how it stays stationary, though. Keep your eyes open for the pitstops. |
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| Tomba |
Posted: Sun Jul 08, 2007 1:18 am |
 Webmaster Joined: Mon Aug 19, 2002 5:32 pm Posts: 1729 Location: Belgium |
MC, here's my view on it: http://www.f1technical.net/development/95 I'm pretty convinced we have a combined wheelnut where one part rotates and the other doesn't. I don't think the weight would keep it in place anyway, and relying on it would also be illegal since it would be movable ballast. |
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| rjsa |
Posted: Sun Jul 08, 2007 2:14 am |
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Talent Joined: Fri Mar 02, 2007 2:01 am Posts: 222 |
It seems to me that the colored nut connects to wheel/brake cover. The white one seems glued to the cover and should fit deeper into the axle.
See above both nuts aligned. Below they are not. That would be the reason for the really long claws of the gun, taking care of two nuts. |
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| kimi |
Posted: Sun Jul 08, 2007 6:03 am |
Member Joined: Fri Jul 06, 2007 6:19 pm Posts: 109 Location: india |
this is an indigenious concept 2 cool d red hot carbon fibre disks after heavy breakin.the 27 degree aperture in d lower part of d rim allows d hot air 4m d brakes 2 fly underneath d car and in dat way increasin d aero balance of car.
2 know how it works refer 2 d link below http://www.f1technical.net/development/95 we still havnt seen its use in live racin.lets wait 4 d british gp 2 catch up wid d pit stop. |
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| Blake |
Posted: Sun Jul 08, 2007 8:33 am |
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Newbie Joined: Sun Jul 08, 2007 8:16 am Posts: 1 Location: NSW, Australia |
For anyone wondering why Ferrari’s aero developments around the wheels are considered legal (I know I was when Ferrari introduced the small winglet behind the front brake ducts) then you should read article 11.4 of the technical regulations, as well as article 3.15.
Thus, anything in the invisible box created by the measurements in article 11.4 are not bound by the regulations in article 3.15 about aerodynamic influence. This means that (in theory) any aero in that area can:
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| Apex |
Posted: Sun Jul 08, 2007 9:50 am |
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Member Joined: Thu Jul 07, 2005 11:54 pm Posts: 114 |
This has nothing to do with brake cooling or rear downforce.... its all a ploy that MS has implemented so that the Ferrari drivers can rub wheels with out the cars flipping over
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