flocrest wrote:
I am wondering if one can test it with a Notio. Thanks for posting this. I was trying to come up with a “factor” to compare older times to a “chip adjusted” course. In looking around 3 to 6 percent looks about right. It’s complicated as some chip is done relatively well compared to the nightmare picture you posted.
The Notio has no estimation for Crr as part of its current features. You could do it with the Chung known elevation method that is described in the slide set that defines and explains the method and the Notio would probably help correct for any non-zero wind conditions.
The Notio does have a built in accelerometer/vibration sensor and it does output a summary graph. We have lots of new chip-seal where I live (yeah) so I will put doing some chip seal testing on the list of things to play with. You couldn’t estimate a Crr, but I would assume that there is a correlation between the amplitude of the “buzz” and Crr. If that is true, you could maybe use that to “tune” for an optimum tire pressure. My guess would be that the tire impedance effect really increases rapidly at some pressure and the optimum pressure is just below that point