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jwscab wrote:its mentioned in the first page or two of the worlds manual.

Sort of...

"The new car starts with a black, hard anodized aluminum chassis made from a new material which is stronger than our original chassis, and comes with the bottom of the chassis already milled out like our Team uses."

My apologies; the World's chassis alloy is 2024-T6. It's on the flap side of the World's Car box. 2024-T6 is also much stronger than 6061-T6, but not quite as strong as 7075-T6.

ROH73 wrote:My apologies; the World's chassis alloy is 2024-T6. It's on the flap side of the World's Car box. 2024-T6 is also much stronger than 6061-T6, but not quite as strong as 7075-T6.

That's awesome information. Thank you! Is there by chance a picture of this somewhere?

I got both of my Worlds Cars second-hand, so I have never seen the box in person.

^ Nevermind. I found a picture.

"2024-T6 Alloy chassis, milled and lightened to Team specs."

Is the T2 chassis made out of the same type of aluminum as the World's chassis?

Well. I can tell you why the chassis were milled. One -was weight. Two -was to provide a channel under the batteries for the speedo wire. Three -was to provide a channel for dirt that collected in the car to find its way out via the holes. This was from Cliff Lett, and he should know.

And sorry, I just have to set this straight, there is no way in hell that removing material from the chassis will make it stiffer. At least not in our universe. Yes, milling away material will add surface area, but this is only useful in heat dissipation. And no it is not like "bead rolling sheet metal". They are two completely different concepts. In bead rolling (or stamping for that matter), you are taking a given material and forming it into vertical surfaces. This does several things, the two most important are - Firstly it adds MANY times more material in a previously un-represented dimension, and two it work hardens the material. This process does add stiffness in the directions of the bends or ridges. Removing cross section from a given thickness of material will only make it more flexible -period. It is physics, if you dont like it, not my fault. if you make it thinner it will flex more. And BTW, you are not adding vertical surface during milling, you are REMOVING it. All the material removed WAS verticle surface area.

AS far as why the Graphite cars were never really adopted by the "Team". Because they did not handle well. The graphite chassis cars (kit ones anyways) were much lighter, and this made for a whole gaggle of issues. The single layer chassis made for a rather flexible car. Not necessarily a problem in and of it's own, but the fact that the CF/Graphite used for the chassis did not absorb energy as well as the aluminum chassis made the cars handle poorly. Rather than absorbing energy like the tub cars, the chassis would return the energy to the suspension and make the cars unpredictable.