First Appearance: Daring Mystery Comics #7 (April 1941)
Golden Age Appearances: Daring Mystery Comics #7-8.
Modern Appearances: None.
Years Active: 3050-?
Captain Daring is a member "of the US Army" of the 31st Century (the year 3050, to be exact), working with the US Secret Service (though he's a member of the Army) against the enemies of America and humanity, which at one point includes a defrosted Adolf Hitler. He has no superpowers, but he has dashing good looks, an underground base, advanced technology, and "specially constructed underground rocket planes, driven by power from the sun."
That's Captain Daring in the yellow armor. The men in red armor are other agents of the U.S. Secret Service, on their way to their rocket planes to deal with the Bad Guys.
Note: In Daring's first appearance he is in the 20th Century, but in the second he is in the 31st, and I'm going to work on the assumption that he is in fact a future hero.