Preflight calibration on Arducopter?

Hi there !

What is preflight calibration on Arducopter ?
And should we perform it before every flight ?


No, you only need to it once. But you do need to do it correctly.
Please read the documentation First Time Setup — Copter documentation
Do not skip any steps!!



But do i need to preflight calibrate if I’m going to fly my quadcopter for the first time today?

There is no mentioning about preflight calibration in the Ardupilot PreFlight checks.

No. You do it just once. And do it right and you can fly anytime at anyplace.

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Where are you quoting this “Preflight Calibration” from?