I dont know alot about public domain characters, but i managed to come up with a character that seams like he could really use a redesign ! This character is American Eagle!
American Eagle was the secret identity of scientist Tom Standish. While performing experiments for the US government, he was accidentally exposed to a mysterious black ray. The ray gave him the powers of the Bald Eagle--flight, strength and (of course) patriotism. Standish used his powers to fight the Nazis and other enemies during World War II. He was accompanied by his young companion Bud Pierce who, as "Eaglet", had powers similar to the American Eagle.
Deadline is: 8.8