Preheat the oven to 325°. Grease a tube pan and set aside. Peel, core, and slice the apples. The apples should be about ¼ inch thick. You can do this by hand or use a food processor to get an even cut.
In a medium-sized bowl, toss the apples in the cinnamon and 2 tablespoons of sugar. Make sure the apples have an even coating. Set aside.
In a large bowl, combine the eggs, flour, remaining sugar, oil, orange juice, and baking powder. Combine all ingredients until smooth using a stand mixer, hand mixer, or whisk.
Pour the apple mixture into the batter. Mix together with a wooden spoon or spatula until the apples are evenly distributed around the batter.
Pour the batter into the prepared tube pan. The batter will be thick, so use a spatula to make sure the batter is evenly distributed in the pan.
Bake the cake for about 55-60 minutes, or until lightly browned on top. Let the cake cool completely before removing from the pan.