The Iron Ace was RAF Captain Ronald Britain. Dr. La Farge, a member of the French resistance and part of a line of Iron Aces dating back to Charlemagne, was killed by Nazis but passed his armour along to Captain Britain just before dying. The Iron Ace flew in a plane covered in "Fabrikoic Micro Iron" which made his plane almost indestructible. I love the strangeness of this idea. I also love the image of a fully suited Knight driving a plane and fighting Nazi's, like something Mike Mignola would dream up.
Iron Ace was drawn by Fred Kida but thew writer is unknown.