Meyer often describes cuts that seem a lot more like plays to me and I believe the sturtzhauw is a two step attack rather than a strike you throw directly. The way I see it the sturtzhauw begins with a scheidelhauw thrown either as a feint or clearing stroke that is followed by a thrust or cut to the face using the short edge to wrap around the opponent’s blade. That’s probably clear as mud in text but it’s a simple, continuous motion when executed… too bad I don’t have a video. Meyer specifically says that the sturtzhauw is mostly used as an opener in both his longsword and dusack sections but it can work when the fur is flying too since the scheidelhauw can often be used as a parry and that will initiate the process.
The sturtzhauw is actually one of the techniques that makes me think Meyer was using molinets in some fashion and as it happens I was taught a means of closing distance with the saber that’s very similar in concept, the main difference is that I was shown a true edge cut to various possible targets as the finishing stroke.
Another interesting note; IIRC Jeffery Hull said that “pounce cut” might be a better translation than “plunge cut.” While they imply similar things I think the “pounce cut” carries over more of a sense of closing distance rather than just stabbing sort of downwards.