App question

[stefan_l_01]

Hi
I started with this app and have a questoon (maybe more in future)

When i choose simple training time/power, i can change speed on my direto, and the direto tries to adapt to keep say 100W constant.
But when I accelerate to over ~ >35km/h, the resistance stays constant and the Watt raise. Why does it not keep 100W constant and simulates a down hill ?
Thx

[Elite Admin S]

Hi

If you pedal too fast, the trainer is not capable to simulate only 100W (due to internal friction). 100W is very low at that speed.
That's why it remains to its minimum resistance.

Regards

[stefan_l_01]

Thx for explanation.
Does resistance then follows a linear behaviour or is it a drag like exponentiell one?

Is it possible in a watt / time controlled training to see, according to current speed and watt, the corresponding inclination? Say as example, if I do 100W at 10kmh it would output 5% as info, if I do it at 20km/h i would say 2% taking in account more wind drag and more roll resistance?

[stefan_l_01]

Today I found that at 50rpm, the direto xr can not simulate more than 300W approx.
I tried to simulate 17-20% gradients and over 14% the power does not change anymore increasing the slope. It sticks at 300w

Thats sad as i bought it being advertised as being able >20%, up to 24% I think. But it cant do, even if I think 50rpm is in still realistic conditions.

[Elite Admin S]

Hi

Simulation capability depends on speed and rider weight.

I suppose that you were pedaling quite slow if the max power was 300W.
Can you please tell me your speed in that moment?
Tell me also your weight, so I can do some calculation

Regards

[stefan_l_01]

Hi

Simulation capability depends on speed and rider weight.

I suppose that you were pedaling quite slow if the max power was 300W.
Can you please tell me your speed in that moment?
Tell me also your weight, so I can do some calculation

Regards

Hi
As said I was pedalling with 50rpm shown in app. My entered weight is 83kg. My circumference is 2130.

I append a screenshot where i manually increased the slope. At the beginning I used a higher gear / speed and it could do more than 300w.
Then I used 1st gear (26/34) and 50rpm which is typical for me in mountains (ftp only 244). Speed approx 8.4kmh.

You can see from 300W on power to keep 50rpm does not change anymore. The slope of plateau begin was 14%. So 15, 16%.. no change in resistance.
Best regards
Stefan

[Elite Admin S]

Hi

8.4km/h is a very low speed.
I confirm you that max power is settled at around 300W with that speed.
This means that at that speed you cannot simulate the highest slopes. You have to increase your speed to be able to do it.

Regards