Yes, I might have better described it as a compilation of testing data. Does that make the data more or less relevant? What do you think?


Where are your links to better testing data?

 

LOL, please clue me in on what I have and haven't ridden.
http://www.rbracing-rsr.com/zx11tubo.htm

 

The size of the front contact patch and rubber compound is the limiting factor.

With the same tire a single disc can stop in the same distance. Either have the capacity to lock up the tire. It is easier to use the max stopping with a single disc because the rider needs a stronger pull on the lever which makes modulation easier.

Think about it. The same bike and tires with the same rider when doing an emergency stop will stop in the same distance. The rider will "feel" that he used less lever pressure and therefor think that the dual set up is stronger/better.

Both set ups will yield about 0.9 g's decelerations. That's on a street bike. A grand prix bike with soft tires heated up could do a little better.

My current fleet of 20 H-D's is a mixture of single and dual disc's along with ABS and non ABS. I can stop each of them in almost the same distance. The dual set ups can not and do not stop the same bike and tire combo than the other. I have single, dual and ABS Dyna's which all stop the same. It just helps my arthritic hands to not have to pull the lever as hard on the dual discs.

 

Okay, did you just make that all up yourself or did someone help you?

More effort on a lever equals better modulation? Have you ever used brake modulation effectively? It is the predecessor to ABS and it was done with your own hand.

.9 g's? You do know that one of the reasons that ABS braking distances can be beat by a good rider is because ABS is set up to max out at 1.0 g's and release and grab and release, cycling right below that 1.0 g threshold.


Chonk

 

This confuses me. I know that a good rider in perfect conditions can potentially out stop ABS by threshold braking, but where do G's come into the picture? I didn't think Harley's have accelerometers, so how are G's measured? My understanding of ABS is there is a rotation sensor that compares the speed of the wheel with speed when brakes are applied and the rotation of the other wheel and senses a rapid deceleration (lockup), releasing the caliper until the wheel starts spinning again, pumps up to reapply braking, and repeat many times a second.

Where do measuring G's come into the picture, and why would it care how many G's are being experienced? (I guess maybe to prevent you from flying off the bike, but I doubt the contact patch of both tires can produce enough deceleration to do that, and if so, maybe you shouldn't be riding...

 

 

did you get on either one of these?

 

Well, I have that one...Shhh, my mistress taking a "spin"






Btw,"did you get on either one of these?"...I get on her and off her





damn...another post count

 

Perhaps you're thinking of Motorcycle Stability Control systems, more than ABS. These are available on a couple of high-end Ducatis, for instance, and do get information from things like inertia sensors. They can do some impressive things, like prevent flipping the bike over the front wheel, or limit how much of a "stoppie" you do, regardless of how hard you grab the front brake. However, there are no standard or universal settings (such as a 1 G limit). They are specifically programmed for each type of bike they are used on.

A little more information:
http://articles.sae.org/14090/

 

It doesn't cycle at 1.0g. It cycles when the wheel locks up (or exceeds the speed differential threshold, which I have no idea what the spec on that is in the computer) , which is whenever you ham fist it and grab too much lever. Other than an unsubstantiated "G" number, his post is correct.

There once was I time I promised myself I wouldn't try to talk tech on this site anymore, and now I have broken that promise. Bad Rob, Bad.

It's like some of you don't understand the basic mechanics of breathing, let alone how anything with an engine and wheels works, but you insists on chiming in anyway.