Local practice - ASI colour markings
I've been looking at the standard practices in lighter aeroplanes (that being my area) for airspeed indicator markings.
Part 23 and the lighter CS(JAR)-VLA require a green arc from Vs1 to Va (or other cautionary speed) where the amber arc starts. It also has a white arc from Vs0 to Vfe. Nothing radical about that.
But interestingly, CS.22 (the European glider and motorglider requirements) show the green arc starting at 1.1Vs1, and the white arc starting at 1.1Vs0 - effectively giving the pilot a 10% visual warning (should he/she/it be looking at the ASI anyway) of the level stall. Additionally, CS.22 fairly uniquely in light aircraft codes, requires a blue line at Vref, which again seems a sensible thing to do to me.
It strikes me that, at-least for these reasonably simple aeroplanes, the European Motorglider standard has taken a simple, but sensible, small safety measure.
Can anybody enlighten me on other local practices with regard to ASI marking, or for that matter opinions about what is best practice (within our outside of the various regulations that we all work with).
G