Btwin watts output not accurate, watts may drop with more effort?!

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    Cedric Turczyn

    Hello Shane,

    What is your Kinomap username so that I can check your training logs?

    When you see the power decreasing, are you sure that you are not on a higher slope?

    If you keep the same speed/cadence but come to an uphill, it's normal that your power decreases.

    Best regards,
    Cedric. 

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    Shane O'Connell

    Hi Cedric!

    User shaneoc

    Power & slope - I’ve seen this with zwift on the same setup. It is normally constant for the duration of the slop/climb. But with btwin training, it is not constant and seems to get erratic if I cycle harder. The readings jump around as I increase effort, mainly down to 150 watts and back up to around 200 - it seems unrelated to slope. I can reproduce it by spinning up and down several times. E.g. If I hold at a constant 200 watts it was clean and averaged better. You may be able to see it from latest activity. The additional effort definitely didn’t translate well into the app unless there was a very large increase in cadence which there was near the end.

    Are there any application settings I should be looking at in the btwin training app? I feel like I’m unable to compete properly and shouldn’t be getting left behind on group rides. I’m guessing that the other folks may have better and more accurate trainers. I thought that it was only btwin users but guess kinomap allows for wider usage.

    Thanks!

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    Cedric Turczyn

    Hello Shane,

    First, it's true that other users have a most accurate trainer, which provide directly the produced power.
    Having a speed/cadence sensor, your power is calculated with the speed + cadence + your weight + the slope you are on. 

    If the speed or cadence that we receive is missing (It may happen), then the power calculation can fluctuate.

    The first thing that I can see in your training log is that your cadence is missing. Did you add your cadence sensor as an additional sensor? 

    Here is an article about how to add it: https://support.kinomap.com/hc/en-us/articles/212102303-Can-I-also-connect-external-sensors-

    Have a nice day.
    Cedric. 

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    Shane O'Connell

    Oops! The battery is out. Let me retest this and generate some new data. Thanks

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    Shane O'Connell

    Hi Cedric, there is a 35 min session there now. I increased effort around the 20 and 30 min mark for 2.5 - 5 mins. It still seems a bit jumpy rather than what should be a more stable watt reading. If the cadence, speed, slope data looks in line with the watts then might it be by design? I'm guessing it might also have to do with the fluid resistance trainer and how it applies resistance. I don't think I am getting the watts increase I am expecting when I change into a higher gear on the bike itself with lower cadence. I seem to be able to achieve more in lower gear and higher cadence hence suspicions around the btwin inride 500.

    Are there alternative apps I can use with the btwin equipment (different to Btwin Training)?

    Thanks again.

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    Cedric Turczyn

    Hello,

    The Inride 500 is a little bit special as the resistance increases according to your speed.

    So changing the cadence isn't useful if the wheel keeps turning at the same speed. 

    On our side, the power calculation isn' the most accurate on this product.

    I don't think that there is another app to train with this trainer

    Best regards,
    Cedric. 

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