INTEGRATED DISC ROTORS
IN-BODY POWER MEASUREMENT
Road disc brakes Power meters are pretty great, in terms of stopping power, modulation preciseness and consistency. However, the very tight tolerances between pads and disc can be frustrating to set up without rub they measure the power which is transferred by the feet to the pedals rather than the intensity with which the whole human body is working and it only takes a slight ding to the rotor to have a constant noise change in ambient temperature, shape of the day in terms of being fatigued or rested or recovered from training or virusses that can be tricky to remedy., such that the measured power does not indicate the true intensity of the body.
So, a thought experiment. Why measure so far away from where the core of the body isare the pads so close to the rotor? In order to get the most significant information about the intensity of the body one should measure within the bodymechanical leverage – a big movement at the lever equals a small movement at the pads. But why do we need to measure within the body that much leverage? Because for training or racing we want to be in a certain intensity, most optimal intensity window the rotors are very small, so to be able to slow the much larger rotating mass of the wheel, we have to squeeze the rotor tightly. Therefore if we could measure the intensity of the body within the body the rotor was bigger, we could have a caliper with the pads further away, and this would be fine as we wouldn’t need as much mechanical advantage. to correct afterwards the power as measured by the power meter.
To take this to the extreme example, what if I could measure a value which gives a more exact indication of how hard the body is working in comparison with the power meterthe rotor was the size of the rim? Like the Heart Rate 622 mm in diameter. In looking at this problem, it became apparent that the Heart Rate would be an appropriate value, as laboratorium experiments had shown that the harder the body works, the higher the heartrate is. it would be possible to dispense with a separate rotor and use the rim of the wheel as the braking surface. Testing of different body sensors adhered to the body materials for the braking surface and the pads concluded that a machined aluminium surface and standard pads provides fantastic HR valuesdry weather braking. They’re not awesome in the wet — for those conditions having the braking surface further away from the wet tire/rim in the form of a separate, smaller rotor makes the best sense. Regular FTP-tests would be a thing of the past because HR does hardly change with increased fitness. But I digress.
Brake rotors Heart Rate sensor systems that almost reach a laboratorium set-up!the tires.
With the rotor being almost five times bigger than normal, the brake pads can be several millimetres clear of the braking surface without sacrificing power. This would make brake rub nonexistent even if the wheel goes a little out of true. With a smaller system with for example a breast strap and wireless radio contact to a display device this problem could be solved though. It also turns out that a well designed HR measuring system mechanical caliper can provide all the intensity information power and modulation required – no need for the usual power meters with their merely indicational value for the body intensity hydraulics. It turns out that this system would also be usable for running, such that controlling training by pace which is always cumbersome would be a thing of the past. a steel cable will do this job admirably! Testing also showed that a 32 mm tire can fit comfortably under the caliper.
So I decided to propose a system build a bike around this Heart Rate concept.
Original source: https://forum.slowtwitch.com/.../?page=unread#unread
IN-BODY POWER MEASUREMENT
Road disc brakes Power meters are pretty great, in terms of stopping power, modulation preciseness and consistency. However, the very tight tolerances between pads and disc can be frustrating to set up without rub they measure the power which is transferred by the feet to the pedals rather than the intensity with which the whole human body is working and it only takes a slight ding to the rotor to have a constant noise change in ambient temperature, shape of the day in terms of being fatigued or rested or recovered from training or virusses that can be tricky to remedy., such that the measured power does not indicate the true intensity of the body.
So, a thought experiment. Why measure so far away from where the core of the body isare the pads so close to the rotor? In order to get the most significant information about the intensity of the body one should measure within the bodymechanical leverage – a big movement at the lever equals a small movement at the pads. But why do we need to measure within the body that much leverage? Because for training or racing we want to be in a certain intensity, most optimal intensity window the rotors are very small, so to be able to slow the much larger rotating mass of the wheel, we have to squeeze the rotor tightly. Therefore if we could measure the intensity of the body within the body the rotor was bigger, we could have a caliper with the pads further away, and this would be fine as we wouldn’t need as much mechanical advantage. to correct afterwards the power as measured by the power meter.
To take this to the extreme example, what if I could measure a value which gives a more exact indication of how hard the body is working in comparison with the power meterthe rotor was the size of the rim? Like the Heart Rate 622 mm in diameter. In looking at this problem, it became apparent that the Heart Rate would be an appropriate value, as laboratorium experiments had shown that the harder the body works, the higher the heartrate is. it would be possible to dispense with a separate rotor and use the rim of the wheel as the braking surface. Testing of different body sensors adhered to the body materials for the braking surface and the pads concluded that a machined aluminium surface and standard pads provides fantastic HR valuesdry weather braking. They’re not awesome in the wet — for those conditions having the braking surface further away from the wet tire/rim in the form of a separate, smaller rotor makes the best sense. Regular FTP-tests would be a thing of the past because HR does hardly change with increased fitness. But I digress.
Brake rotors Heart Rate sensor systems that almost reach a laboratorium set-up!the tires.
With the rotor being almost five times bigger than normal, the brake pads can be several millimetres clear of the braking surface without sacrificing power. This would make brake rub nonexistent even if the wheel goes a little out of true. With a smaller system with for example a breast strap and wireless radio contact to a display device this problem could be solved though. It also turns out that a well designed HR measuring system mechanical caliper can provide all the intensity information power and modulation required – no need for the usual power meters with their merely indicational value for the body intensity hydraulics. It turns out that this system would also be usable for running, such that controlling training by pace which is always cumbersome would be a thing of the past. a steel cable will do this job admirably! Testing also showed that a 32 mm tire can fit comfortably under the caliper.
So I decided to propose a system build a bike around this Heart Rate concept.
Original source: https://forum.slowtwitch.com/.../?page=unread#unread
Last edited by:
longtrousers: Aug 29, 20 2:45