Originally Posted by
slip and turn
So how does a 737-MAX 8 or a 738NG or any other late model aircraft know when to transmit via ADS-B that it has become airborne? And if it does, and gets it wrong at 93kts groundspeed, against what are all its subsequent pressure altitude reports calibrated?
Usually a WOW (weight-on-wheels) switch, but since I fly a type made by another manufacturer, I'll defer to pilots of the type to confirm.
A WOW switch is usually just a microswitch in the MLG which indicates whether an aircraft is airborne according to the amount of oleo extension.,