Farnk666
First Officer
Flight distance : 1711394 ft
Australia
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Hi Nail,
You will get many opinions in response, some informed from fact and testing, others from things they have read online and taken as gospel.
My advice is to do your own testing, research and understand just how the A/C systems operate, read what people suggest and make up your own mind.
Lots of people will read things here and there and apply them willy-nilly as gospel truth - despite not actually understanding the engineering behind it all.
So, FWIW I'll give you my approach.
IMU calibration is done after every firmware update and in any circumstances where the A/C has been subject to shock or severe vibration.
It is performed on a known. flat surface, preferably with the A/C cold.
Similarly, I calibrate the sticks on both controllers after every firmware update.
I perform compass calibration at each new flight location, just once at the start of the flight session.
There is no requirement to remove metallic objects from your person (watches, keys, phones, etc.) - this is a myth that keeps being put forward.
Location for Compass calibration should be clear of large metallic/ferrous/magnetic objects - a patch of grass or open field location is usually perfect.
Finally, you will read people confusing IMU and Compass calibration procedures all the time - lots of comments to the effect of 'keep your Inspire away from metal when doing an IMU calibration'.
Best to ignore such.
As you fly however, keep an eye on the Inspire and if/when it begins to display signs of erratic behaviour or strange error messages, check the sensor values and re-calibrate Compass or IMU as necessary.
Most importantly, get familiar with the engineering behind these technologies so that you understand exactly what is going on.
Fly safe and have fun !
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