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author invents new brake tech?

MikeGyver said:
I always thought the holes in discs were for hot gases that build up between the pad and disc to escape, not for cooling. It seems like a vacuum pump on the motor would be better served as a supercharger, not to cool brakes. Why not just space the disc out farther from the wheel so it is in open air like Ducati did on some of their race bikes?
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They are. And vacuum pumps are not designed for volume, they are typically low flow. The most efficient cooling comes from the large quantity of air passing over the brake when the bike is at speed.

Unless it can be proven that the loss in HP driving a pump can be offset by at least 2X by taking the brakes out of the air flow (streamlining)around the bike, I can only see this as an exercise in self indulgence by an engineer.

/haven't read the article yet

EDIT: I think the "vacuum pump" label might be a misnomer; There are no pics of the device, so I can't tell what type of "pump" it is.

It's possible they're using a regenerative vacuum pump which does move relatively high volumes of air, but the velocity of air over the brakes into the pump would have to always be greater than the velocity of the bike.
 
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maxandgrinch said:
BARFer with the dad that is an engineer...
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My Dad is not an engineer but I did stay in a Holiday Inn last night. I'm not a big fan of the Buell single disc. All the other race teams have a different solution and all the other teams have decent design engineers. So Buell is on their own pathway. I'll be willing to eat some crow if Buell starts winning races due to better brake performance but until then, it sounds like the brake system already needs some help.
 
Hyperborea said:
From the organic compounds in the pads when they get hot.
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got any evidence? what do u mean by hot? if u mean "at a high operating temp", i doubt it. if you mean "melting off the backing plate", then ya sure.

an organic pad may combust and produce gasses outside of its designed operating temperature... but dont you think that hot gasses are the least of your worries at this point? wouldnt the solution to that problem be running a pad designed for the extra heat, not drill holes in your rotors? of course, this is more speculation on my part but i gotta keep the convo about vehicle myths going somehow.
 
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stangmx13 said:
got any evidence? what do u mean by hot? if u mean "at a high operating temp", i doubt it. if you mean "melting off the backing plate", then ya sure.

an organic pad may combust and produce gasses outside of its designed operating temperature... but dont you think that hot gasses are the least of your worries at this point? wouldnt the solution to that problem be running a pad designed for the extra heat, not drill holes in your rotors? of course, this is more speculation on my part but i gotta keep the convo about vehicle myths going somehow.
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The gasses that most people are referring to only applied with old school pads and isn't really an issue with the modern stuff.
 
Wow, the thread title itself explains it, the concept makes absolutely no sense and has no evidence to support the assertion, and most everyone STILL missed it.
 
ohio said:
Wow, the thread title itself explains it, the concept makes absolutely no sense and has no evidence to support the assertion, and most everyone STILL missed it.
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Don't judge a thread by it's title! :laughing
 
ohio said:
Wow, the thread title itself explains it, the concept makes absolutely no sense and has no evidence to support the assertion, and most everyone STILL missed it.
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we have a winner!

the author was seriously deluded, eh?

one of the BadWebbers found another of this guy's articles - a condensed history of Erik Buell's various companies - & it was also inaccurate, & kinda wacky

watching this thread unwind & coil back over itself was fun.......
 
stangmx13 said:
got any evidence? what do u mean by hot? if u mean "at a high operating temp", i doubt it. if you mean "melting off the backing plate", then ya sure.

an organic pad may combust and produce gasses outside of its designed operating temperature... but dont you think that hot gasses are the least of your worries at this point? wouldnt the solution to that problem be running a pad designed for the extra heat, not drill holes in your rotors? of course, this is more speculation on my part but i gotta keep the convo about vehicle myths going somehow.
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Not myths but apparently old info. It seems that the outgassing from pads is no longer a problem. It was at one point but apparently newer pad materials have solved that

I did a little research on the interwebs and found an interesting report from TRW that concludes that slotted or cross drilled rotors are the best because of their ability to prevent glazing and to remove debris. The cross drilled rotors add cooling airflow when combined with internal vanes but bring the downside of potential cracking. For street used the TRW report suggested slotted for street or spirited driving because of the cracking issue. It further suggests that cross drilled be used only for track driving because they are frequently inspected and replaced so mitigating the cracking issue.

This raises the question of why are most modern bikes fitted with cross drilled rotors but there are no cracking issues there?
 
^^ even with fairings I'd say far more air flow on bike rotors than those tucked away in car wheel wells?
 
Hyperborea said:
This raises the question of why are most modern bikes fitted with cross drilled rotors but there are no cracking issues there?
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Because they're not subjected to the same magnitude of stress as car rotors and weight is a much bigger issue on bikes so the risk is worth the reward.
 
cars weights 6-20 times more than a bike. lots more heat stress and not a lot of direct exposure to air stream. air ducts help.
 
Actually, having read more about the 1190, sounds like the slipper clutch is some how vacuum operated. I wonder if the author of the article got confused.
 
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