pancelticpiper wrote:
About the fingerings I posted, as far as I can tell they've been around a long time, probably longer than some of the whistle fingerings I see nowadays which appear to be based on recorder and Boehm flute fingering systems.
There's a whole set of clarinet fingerings that have the purpose of going over the break easier, and as pointed out various woodwinds have trill fingerings. All these things make what would be complex note-changes much easier, allowing faster and cleaner playing.
I've been looking for a chart that includes fingerings like the ones you posted earlier. There are comprehensive charts available for alternate recorder fingerings, but I haven't found anything comparable for whistle. The closest I've come up with is this one:
https://i.pinimg.com/originals/02/9b/cd/029bcd9f61dba9a3391e41b2e8103466.jpg