Flap Limit Protection on 747 'Classic'
I am aware that the 'Fast/Slow' pointer on the ADI in the Classic is driven by the difference between the Command Airspeed Bug and the Captain's ASI.
I was wondering whether or not anyone knows where the Flap Limit Protection system gets it's airspeed information from?
And while I am here, does anyone know where it is written that the overspeed warning system senses whether or not there is fuel in reserves 2 and 3? This enables it to sound the overspeed clacker at either 342KIAS or Vmo, independent of the Aux/Norm switch selection on the ASI.
Thanks in advance.