I have to admit I'm one of those who has rarely used a hand plane. Every now and then I'd grab one to smooth a spot etc.
Recently acquired a Stanley 7C jointer and after tuning and sharpening the iron made a few passes over some oak. I know the iron was sharpened correctly but I was getting the shavings jammed between the blade edge and the front of the throat so that after one or two pushes, it wouldn't cut.
Ultimately determined that when I replaced the frog and tightened it down, it moved back from the opening by a steenth. Reset it to line up with the edge of the mouth and all is well.
Which brings me to the point - - What is the purpose of an adjustable frog. Do you get a smoother cut with a smaller opening?
Just curious.
Vic