"Grapefruit"

[Tom D]

I am currently reading a book entitled "Staying Alive," by Carl Fyler, a B-17 pilot who was assigned to the 360th Squadron of the 303rd Bomb Group (H). On page 74 of the book, the author states: "We were carrying single 1000-pound bombs called 'grapefruit' under each wing. These bombs had wings which would fly them 20 miles to the target at 180 mph. They would go through a block of buildings before exploding."

Has anyone ever heard of these "grapefruit" 1000-pound bombs before?

Tom D