Hi,

  a s soon as I accelerate, all of the sudden the Altimeter and the VSI begin to behave like a pendulum; the needle of the altimeter moves like a tic-tac of about 500 ft, while the VSI, in opposition, ranges from 1000 ft/s to -1000 ft/s. The attache images captured the gauges in a time lapse of less than seconds. In the meantime, the altitude shawn in the HUD works properly.

    Regards,

        Fulvio Arman

   

They are supposed to do that in the transonic region and when the refueling probe is deployed.

Quote

+ Steam gauges now exhibit errors in transonic flight and with the refuelling probe extended