Problems with data (speed or g meter) not being correct?

Chad-1stgen · Post by **Chad-1stgen** » Thu Apr 30, 2015 4:11 am

Lately it seems at least one lap a day that I record with harry's lap timer gets messed up. My most recent example is an autocross I did this past weekend that I manually started and stopped the recording for the lap. However, when I overlay the data the G meter is off. It actually looks like it might be reversed between linear and lateral. Any way to fix this? What caused this?

Thanks

Post by **Harry** » Thu Apr 30, 2015 6:24 am

For v18.3, LapTimer starts a recalibration each time you rotate the device. Recalibration can go wrong if LapTimer applies wrong assumptions on the current state (e.g. it may assume you are standing on flat surface, but you don't).

For the upcoming v19, LapTimer will use calibration presets and not calculate it individually by default. Presets for cars are the device is mounted centered in the windscreen - mostly upright, and slightly turned to the driver. There are four presets overall - selected automatically. It is still possible to do your own calibration and to store it for future use (new). Finally, the G-G diagram offers options to flip accelerations after the fact.

Harry

Chad-1stgen · Post by **Chad-1stgen** » Thu Apr 30, 2015 3:54 pm

Is flipping the G accelerators after the face a current option?

How do I do that?

Post by **Harry** » Thu Apr 30, 2015 4:01 pm

No, the current version supports rotation only. You can find the option in Lap List -> any lap -> Data Recording -> select track preview -> Charts -> swipe to G-G chart

- Harry

Chad-1stgen · Post by **Chad-1stgen** » Fri May 01, 2015 6:51 am

Harry wrote:No, the current version supports rotation only. You can find the option in Lap List -> any lap -> Data Recording -> select track preview -> Charts -> swipe to G-G chart

- Harry

Great this helped! Thanks!