Issues with power calculation

[ghost]

So, I have installed the sensor, configured the RPi Zero W and this part works flawlessly. I am able to see the web interface, I am able to see the SMB share. The impulses are being read too and there is data flowing on the screen.

But I have a strange issue: the more I set the damper higher (in means that the training would be harder), the power readings are decreasing. For example on max level 20 of the rower my test strokes are around 50 W on the web interface but on the original rower display they are around 115 W but when I decrease the damper to level 1, the strokes are 25 W on the rower and around 325 W on web interface.. This works the opposite way, I guess...

The flywheel spins more freely (longer spin-down) when there is level 1 and when level is 20 the action stops pretty quick as the magnetic resistance is higher.

I've tried to set all parameters as best as I could think of.
I am having trouble with flywheel inertia, because my flywheel should be (according to producer) 9 kg and it's radius is 11,6 cm and this values gave me the inertia 0.12148663. Tried it and the values were flying trough the roof. I've tried also some random values and currently have 0.9

Also the magicConstant must be set to around 40 because the flywheel makes so much rotations on every stroke.

What I am doing wrong?

[JaapvanEkris]

Also the magicConstant must be set to around 40 because the flywheel makes so much rotations on every stroke.

What I am doing wrong?

The magicConstant isn't related to the number of rotations per stroke in any way. In essence it defines the ratio between the power and the Linear Velocity. 2.8 is a normal rowing skiff, and 40 is something near an oil tanker. You could row that way, but it is a unwise to change the magicConstant without the specific goal to simulate a totally different boat.

But I have a strange issue: the more I set the damper higher (in means that the training would be harder), the power readings are decreasing. For example on max level 20 of the rower my test strokes are around 50 W on the web interface but on the original rower display they are around 115 W but when I decrease the damper to level 1, the strokes are 25 W on the rower and around 325 W on web interface.. This works the opposite way, I guess...

The drag works like a bike gear, and is not a resistance tool per se. So increasing the drag will make things heavier, but will result in more power per stroke and typically less strokes. But it is also about effectiveness: just like you wouldn't cycle uphill in 21st gear and won't cycle down in 1st, you need to find your optimal drag.

I've tried to set all parameters as best as I could think of. I am having trouble with flywheel inertia, because my flywheel should be (according to producer) 9 kg and it's radius is 11,6 cm and this values gave me the inertia 0.12148663. Tried it and the values were flying trough the roof. I've tried also some random values and currently have 0.9

I would reset the magic constant to 2.8, and just see when the numbers start to make sense. Please note that most rowers' monitors produce total BS. On my NordicTrack, I could easily row 400W, which is totally impossible on a callibrated Concept2.