| Author | Message | ||
     M1combat |
I have played around with the emachineshops.com software enough that I'm pretty confident that I can model the front brake rotor of an XB. My dream is to have a titanium front rotor. My intention is to recreate the same or VERY close to the same design. Could one of you engineer types attempt to enlighten me as to which type if Ti to use? | ||
| Roc |
Is titanium a good brake material? Will it absorb and dissipat heat as well as iron or stainless? Will it warp? Are pads available to use with it? Is this a lot of money to spend on a consumable part? I'm not an engineer type and those thoughts are all I can offer, sorry. | ||
| Anonymous |
Titanium is a BAAD choice for a brake rotor, my friend. | ||
| Aaron |
Howsabout stainless clad aluminum? I'm thinking you must've run out before you got to number 50, a magnet sticks to mine. | ||
| Wyckedflesh |
Hey M1 while your at it make me a triple that allows the clip ons to fit above without having to raise the forks  | ||
| Blake |
What anony said. Why would you think Ti would be a dream brake rotor when no one anywhere uses it for brake rotors? They don't use it for very good reason. Nor do they use aluminum. Your choices as far as I know are limited to stainless steel, steel, iron, or carbon. | ||
| Steve_a |
You can make a damn nice (and very light) brake rotor out of high-silicon Reynolds 390 aluminum, or better yet, an aluminum matrix loaded with silicon carbide filaments. Both have been used on some specially applications (GM tested the 390 for cars and bicycle discs have been made of the composite aluminum). Either would work well for a lightweight street bike, but they may not hold up under the most severe racing thermal loads. (GM gave up because the aluminum discs failed the down-Pike's-Peak-towing-a-trailer test.) A certain Pittsburgh Performance Products once sold a composite disc with stainless steel faces and aluminum core, using the same exotic technology found on many skillets. I wonder if that guy is still around . . . And, of course, there's always carbon-carbon composite, about half the weight of an aluminum disc . . . edited by steve_a on June 08, 2004 edited by steve_a on June 09, 2004 | ||
| Bomber |
I've heard reports of ceramic rotors being tested, but no recollection of test results | ||
| M1combat |
Well, I'm not exactly stuck on Ti at all, just the lightest safe material. Why is Ti so bad though? You can get Ti rear rotors for most bikes and some circle track guys use Ti rotors on sprint cars as I recall. I suppose neither of those situations generate a lot of heat though (relatively anyway). Is it because it gets a little sticky at VERY HIGH temps? | ||
| Aaron |
That's what I was getting at, Steve ... supposedly RR1000's were fitted with those rotors. But not mine. Just wondering why, was hoping Anony would tell the story. | ||
| Kenb |
how about forming your own carbon fiber ones like porsche and f1 does ? would be more fun. | ||
| Philip |
my kawasaki has plasma coated aluminum rotors. they are not drilled and look like stock rotors but they are as light as a feather. they were already on the bike when i bought it so i don't know who made them. | ||
| Davegess |
The clad rotors are very thin on the ground. Getting the material made was a challange and hwile some early RR's might have had them, my old and foggy brain cannot recall, I suspect that not may did. It was possible to overheat them if you tried hard enough. Dave | ||
| Steve_a |
Phillip -- those were made in California by Harry Hunt, maybe -- my memory is failing me here. Cook Neilson ran them on his Ducati Superbike in 1977, and I put one on a 125cc road racer in 1979. They were very light and worked well as long as you didn't get them too hot. Eventually the aluminum would start creeping out from between the plasma-coated surfaces if you overdid it and ran them on a heavy bike on a circuit hard on brakes. One of the Italian brake companies offered a similar component for awhile -- Mamola used to run them on a 250. | ||
| Loki |
Just go watch a WOO Sprint car after dusk. They really do use the brakes......do they ever. I was at Cedar Lake one time, you would swear the car was on fire. 'cept it was just really brightly colored left rear rotor. It was kinda cool to watch it change colors as he stood on the pedal. | ||
| Loki |
Next time you get the chance. At an air museum that has a SR-71 on display. Look at the Ti skin panels and how they fit(or lack of it). That my friend is a sign of how much it expands with heat. If memory serves me right...the plane grew something like six inches in length at speed. |
