[Racebox] Leanangle + G Force

MasterL

Hey there
i mostly use racechrono and racebox for motorcycle activities. i have also seen the other really old thread regarding lean angle.

biggest point by the RC dev was that racebox themselves cant implement it, i have tried their app and they do give accurate lean angle data nowadays but RC still seems to use some "calculated data" which is extremly wrong.
for example if i record a session with their app, i get pretty much equal lean angle left and right somewhere between 40 and 50°
whereas in RC i get over 60° to the left and not even 40° to the right. i have run multiple calibrations before going on track but it didnt seem to help.

another thing is g forces, while forward/backward works fine, left to right doesnt seem to be displayed as i am expecting.
i totally understand that if the device is leaning with me, the gforces left to right for the device will be nearly 0 as i am going through the turn, but shouldnt there be a formula that translates my leanangle so that the X and Z axis (left-right & up-down) will be calculated correctly so that a somewhat close representation of how much forces are applied to each side can be generated?
i have certainly seen that in data loggers and those use static gyros aswell

best regards

aol_of_RaceChrono

Did you calibrate in RaceChrono? The calibration in the RaceBox app does not transfer.

You can also try to calibrate afterwards in RaceChrono by doing Session > (top menu) > Session settings > Auto-detect. In session settings you can also select between IMU and GPS for the source.

MasterL

yes i calibrated in RC when the bike was upright.
why is it using GPS anyways when theres a gyro available?

aol_of_RaceChrono

It should be using the IMU by default.

MasterL

imu from the phone or the racebox?

Cali_Chuck

Jumping on this.... been trying to chase down my always wrong lean angle in RaceChrono and found this discussion. I see the IMU Source option under Session Settings, that seems to do the trick. But I can't locate anywhere any ability to default the IMU source globally.

When I recheck a half dozen random session from the last two years, they all say "GPS" for "Acceleration and lean angle source".

But I run Racebox Mini 100% of the time... Changing this session by session is not practical, surely there is a way to select globally? Thx...

aol_of_RaceChrono

@Cali_Chuck I've changed the default to GPS in v9.0, as most users do not need IMU and it makes using the app little bit harder. My plan is to add GPS/IMU switch to settings once I figure out good way to do it.

wayne0411

Hi @aol_of_RaceChrono Is RC can support import Racebox mini S offline .vob log include IMU data？