Originally Posted by Genghis the Engineer
Finally all current knowledge and research shows that a dial gauge indicator (or it's linear equivalent - a speed strip) is the best, safest, and most user-friendly indication of airspeed (for handling purposes at-least). So th IAS/CAS display should NOT be digital in nature.
G
This is worth repeating. For something as important as airspeed, you really need a dial/gauge type indicator. An analogue gauge lets you identify trends and approximate values better than a digital display. It is much easier to see that you are a bit slow, and getting slower for example. With a digital display it takes more brain power to interpret just what those rapidly changing numbers mean.