My property used to be an apple orchard, planted over a hundred years ago. Most of the trees are gone, but there are still three or four down back. Not even sure what kind they are, the trees are pretty big by today's standards, and the apples are smaller than a baseball, red mottled colored skin, and on the tart side. They make good pie, and are good for eating too. I've had this place for six seasons now. Production is usually pretty good, but this year, and two or three years ago, there were no apples at all. So in my experience, two out of three years are good.
There is one tree that was broken over in the ice storm ten years ago. The tree is on its side, connected to the trunk by no more than a quarter inch of splintered wood. But that tree top laying on the ground still pumps out an impressive number of apples.