Interesting points guys. On the sim, the situation is that during an emergency descent to FL100, ROD on the display starts at about half the actual ROD of the A/C (4,500ft/min), slowly increasing towards the true value...but even at FL100 it does not match exactly. My gut feeling is that it would be impossible for them to match, but do you think an actual ROD which is double of what's indicated is realistic?
