Calculating Flywheel Power from Power at the wheels?
How does it work for a MYxx?
What is more at the flywheel:

- 134kW at 6200rpm (at the wheels)
or
- 134kW at 5700rpm (at the wheels)

thanks for any comments
ric

 

I'm not an expert on this subject but my understanding is that you cannot accurately convert power at the wheels to power at the flywheel. There are so many variables and unpredictable losses that it doesn't work.

D.

 

Likewise, I'm no expert and don't put too much faith in percentages quoted as drivetrain losses - any such figure is valid for that car on the particular dyno.

The losses are not linear - the more power the car has, the lower the percentage drivetrain loss.

If you look at

 

As Gavin says the losses are not linear, but in more ways than one -- they are greater the higher the revs, just look at the green 'P-drag' curve in any of the graphs in the Powerstation section of the above website.

So chances are that 134kw at the wheels made at 6200 rpm is more at the flywheel than the same figure made 500 rpm lower.

Paul