1. Preheat oven to 350 degrees. 2. Grease and flour a 9" tube pan. 3. Beat eggs; gradually beat in Sugar and then beat in oil. 4. Sift flour with baking powder and salt. 5. Add to beaten mixture alternately with orange juice; beat in vanilla. 6. Pour about 1/4 batter mixture into prepared pan. 7. Arrange 1/3 of the Apple slices on top; sprinkle 1/3 of the cinnamon/Sugar mixture on Apples. 8. Repeat thes layers using 1/4 batter each time and 1/2 remaining Apple slices and cinnamon/Sugar mix making last layer batter. 9. Bake for one hour.