There are lots of Vasart canes (and also some Paul Ysart ones, too!) that have three canes set in the centre of a complex cane. They also used the design concept in some weights such that the centre of the weight had three complex canes rather than the usual single-cane-with-contentric-ring (see here for an example
An example of a multi-cane-distortion is in this weight
which has canes with a central motif of three large and three small canes. In one of the photos you can probably make out what seems to be a "V" as the inner part of some of the larger of the three central canes. That is just a movement of yet another, but even smaller, group of three large and three small canes.
In the Vasart example Dave shows, it is clear that at least one of the "three-element" canes retains the original round shapes. The others were distorted in different ways during the making of the weight. I really do not think they were made as proper, elongated "propellers". If they were truly "propeller" canes, why would some still show the round elements?
Of course, if people wish to refer to that form of distortion as "propeller" then I suppose it's as good a description as the "V" (for Vincent!!!) in my example of "3+3" canes.