G-8 was a heroic aviator and spy during World War I.  For 11 years, from 1933 to 1944, G-8 starred in his pulp magazine, G-8 And His Battle Aces.  Because G-8 was an aviator, he had several adventures like this:

However, the majority of G-8’s adventures were more like this one:

G-8’s adventures were outlandish even by the standards of the pulp era.  Below are the covers for some of his most spectacular adventures.  Though I’m not a 100% sure, I think all of these covers can be credited to Frederick Blakeslee.