Drehende Massen im Durchzugsrechner zu groß? | Posts 16+

I'll check which definition is correct tomorrow and get back to you here.

@ulf:

Okay, I need to correct myself. According to... Is the axle ratio simply the gear ratio between the transmission output and the wheel drive shaft (i.e., purely rotational)?

But we had already agreed on changing the traction force by adjusting the wheel sizes.

Yes, and Ulf takes this change in traction force into account by using the speed in his traction force calculation (F=P/v) instead of a fixedly calculated tire radius (and then F=M/r, which is worse because nothing is balanced and you need the gear ratio, as Ulf already mentioned).

To my previous post:
'When I said 'at 0% gradient,' I just meant that it's difficult to estimate.'

And when I said 'new tires,' I actually just meant that the rolling circumference should correspond to the calculated rolling circumference (especially if you're already opting out of using the speedometer to compensate).
It's easy to make mistakes during the test, such as using smaller tires, setting the initial speed to 50, and then overlooking a 1% incline, which could lead to a perceived 8% increase in performance.

I was already aware that this wouldn't happen to you (Ulf), it was just a note for laypeople who believe they have at least 100% more power, and who don't consider that in a test, they're not on a slope but rather already in free fall .
Best regards,

Hi Ernst,

Quote:

With "at 0% gradient," I just wanted to say that it's difficult to estimate.

Sure, but as a general guideline, the test can be performed in both directions (without wind interference).
If significantly different values are obtained, the average is slightly rounded down (because the time added for going uphill is greater than the time saved going downhill), providing a useful estimate for the 0% situation.

Quote:

And with "new tires," I actually just meant that the rolling circumference should correspond to the calculated rolling circumference. (Especially if you're already foregoing the correction via the speedometer)

Yep, a significant source of uncertainty. Therefore, the speed calculator also indicates the permissible maximum and minimum rolling ranges.