11 replies to this topic

[desmo]

Ferrari debuted a new-type brake late last season dubbed the Brembo CCR. The discs and pads are made by another undisclosed manufacturer probably American. These are said to offer better wear characteristics than Hitco or CI discs. As well the pads are said to have lower heat conductivity than conventional pads allowing smaller brake ducting with attendant increases in aero effeiciency of the entire chassis. In this image you see a comparison of the CCRs vs the previous brakes. The differences in brake ducting are obvious.



Both pads and calipers come in standard and lightweight versions suitable for varying circuits trading off wear against unsprung weight. In the above image you can see the thinner lightweight discs as fitted for the Nurburgring.

The pad wear is monitered in real time via the telemetry link by means of an indicator made by Penny & Giles mounted on a hook connected to one of the pistons.

[Ray Bell]

If the pads transfer less heat, does this mean more has to be dispersed via the disc? Is this, in turn, pumping more heat into the tyres?

[desmo]

It would seem so, wouldn't it? I've never seen any data on the transferance of heat from the brakes to the wheel/tire. It would seem possible to me to insulate the tire from both conducted and radiant heat to a large degree. Look at the path the heat would have to take through some well heat-sunk bits before it got to the tire's tread. Radiant heat would flow to the interior of the wheel. I'm not sure what the ramifications of this heat would be for tread temperature.

[Ray Bell]

Heat sinks initially, but heat sinks that aren't specifically being cooled. If more heat is going into the disc, it has to go somewhere, and the path leads to the wheel first. Radiated heat, too, but you are right, the tread is the other side of the rim. Pressures would suffer first.

[redline]

Just out of interest Desmo, where did you find the drawings ?

They look like the work of Giorgio Piola, but I've not seen them before...

[desmo]

I got them from a French language Ferrari technical site, then uploaded them to Alta Vista, where I made a page containing all of them. To see them all go to:

http://photos.altavista.com/fiimages

There's some fantastic stuff there.[p][Edited by desmo on 09-13-2000]

[andy_bee]

They are Piola's work

[desmo]

If you are into F1 tech and you can read French, the site I got the images from has some very interesting analysis of tech developments of the F1-2000 during the course of this season. The URL is:

http://www.chez.com/.../evolution.html

[desmo]

I wonder what sort of lubricant they use in the wheel bearings. I've read the bearings are ceramic now, as well.

[Nathan]

Why dont teams use wheels that are designed to suck air our of the brake/hub area? I think Porsche tried something like this only a few years ago. I believe they designed the spokes like fan blades, and as I said sucked out the hot air as the wheel spun. Would this design perhaps cause to much turbulence??

[Ray Bell]

How would you like to be alongside a car with such wheels as it entered the braking area? Carbon dust all over the place, heat, disturbance... could be interesting.

[srf]

Wouldn't the brake ducts push brake dust out of the wheels anyways? So don't they already have the turbulance, carbon dust, etc?

The brake ducts might be small enough to do a good job of cooling with less energy than would be consumed by wheels with fan blades. Modifying wheels in such a way might mean more unsprung weight too?