Speed is wrong

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9 comments

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    Fevre Jean Michel

    I have the same problem
    kph display instead of kmh
    thank you for helping

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    Harald Kurz

    Jean Michel, I don't understand, what do you mean by "kph display instead of kmh" ... kph and km/h are both terms for the same identical thing. 

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    meakynovak

    Have you fixed this? Yesterday everything worked well, today a have the same problem

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    Ocram NDH

    Same problem here, i have tested kinomap app and kettmaps app with both devices like Smartphone and Tablet.

    The cadence is right but the speed is mutch to slow.

    I use an Kettler Golf C2. It means i use the camera sensor on my device.

    Please fix it. I would like to buy the FULL ACCESS Subscription but with the low speed i can´t use the app correctly.

    The Videos are stocking in Challenge Mode.

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    Jim Jackson

    I am also using Kinomap on Android with a simple speed/cadence sensor. The cadence sensor works fine and the power display also follows the effort put in. However the speed figure seems unaffected by my pedalling. Reducing pedalling to almost nil or spinning fast has no affect. I am assuming that the displayed speed is just taken from the original video. 

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    Florin Muresan

    I have the same problem, everything seems to work alright, but when I start pedaling, the video starts but does not increase the speed or slow down. It just shows the constant video speed recorded by the original user. I use the Garmin speed and cadence sensor and 1 ant+ dongle attached to my android phone.

    I look forward to your answer!

    Thank you,

    Florin

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    Jim Jackson

    I have raised a support ticket #28198 for this, I expect it will be fixed soon.

    • Your request (#28198) has been received, and is being reviewed by our support staff.
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    Jim Jackson

    I got a response from Cedric. Apparantly there is no fault. The displayed speed will differ quite markedly from ones raw speed i.e. the speed of your wheel. You raw speed is combined with the assumed %age resistance level specified by the training session, to calculate your power. This figure is then used with other parameters, gradient, rider weight etc. to calculate the speed you would be travelling at, at that point on the course.

    I am going to try and deduce the power curves Kinomap uses by riding the flat interval session at differing raw speeds and noting Kinomaps power figures as my trainer is not graded in %ages.

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    Jim Jackson

    I think my problem with speed was due to the fact that I selected Discovery mode where the video plays at the original speed, not Challenge mode where speed varies with pedalling.

    I have done a few tests to figure out how Kinomap works for those with simple turbos having only speed/cadence sensors.

    Firstly the raw wheel speed, as displayed on a bike computer is translated by Kinomap into equivalent power, this figure must then be used with gradient, weight etc to produce the virtual speed you would be doing at that point on the course for that effort. The percentage effort level has no effect on the displayed figures so there is no point varying it. I had thought that I would need to change the resistance level of my turbo to follow the difficulty of the course but no. That would have required Kinomap being programmed with the power curves for every turbo trainer, so I can see why this is not done.

    Instead Kinomap operates it's own generic power curve to translate wheel speed into equivalent power. I did a few tests, up to 200W. Someone with better legs might take it further.

    Anyways I discovered that I got 55W at 15kph and 108W at 25kph regardless. These are quite low figures as the nearest match for my turbo trainer is the second easiest setting.

    Therefore when using Kinomap I have to set to turbo to this setting and just leave it there. When riding a course I watch the virtual speed figure and when the route climbs the speed drops. The only way to increase power output for hills is to change to a higher gear. So you need to change to higher gears for climbing and lower gears when you are recovering on the downhill. This seems a bit odd at first but the effort put in feels realistic.

    Regards

    Jim J

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