I was reading "Just Fishing" by Ray Bergman. He suggests that using a fly propeller can sometimes get the trout biting when the streamer action is slow. Bass Pro had some Wapsi fly propellers on sale. I e-mailed the folks at Wapsi and asked what size (Sm., Med., Lrg.) worked best with what size flies? NO RESPONCE!
I realize that the shape and materials as well as the hook size will effect how well the various size propellers will perform. Can someone get me started on using fly propellers..