TheLastFlightToMNL wrote:So, i'm flying this domestic route from Brisbane to Great Barrier Reef Airport in a Chris Evans Jetstar A320, and i notice that the two airspeeds are not the same. So i turn on the Pito heater and it fixes it's self. 20 minutes later the pito heat is still running and the avionics speed shown has again shown a difference.
Not enough information here. what altitude were you at and is your generator running. In most aircraft the pitot heat uses the battery and that will eventually die. But you usually notice other thing not working as well like the radio.
And which airspeeds are you talking about. There is TRUE AIRSPEED CALCULATED AIRSPEED and Ground speed. just to name a few. There are times when two can be the same but it does not happen that often and usually does not last long. Head or tail winds effect TRUE AIRSPEED where a cross wind might not effect it that much.
Okay silly me did not pay attention to the Question. I would not worry about it like I said head winds and tail winds can effect that and I am not sure if shift +Z takes that into account you will also notice that the altitude it shows is hardly ever the same as what your altimeter says. I am pretty sure that is because it is ignoring the pressure. I think it uses 29.92 but I am not 100% sure.
I only use shift+z to tell me heading and frame rates.