Murray Karn, still a teenager when he drew Thunderfist, did a fair job with the artwork, although there are some Flash Gordon swipes here and there (common in American comic books, also). The story, by E.T. LeGault, commits the same sin as many American comic books, by telling us in captions what we are looking at in pictures. It also feeds into wartime xenophobia with a caption about “foreign-looking men” — but that came from the insecure times in which it was created.
In this story I like the giant robot. As you regular Pappy readers know, I am drawn to stories with robots, and also gorillas. Maybe it came from watching the cheapo/ultra cheeseball Robot Monster movie when I was a kid. They showed it several times on television when I was a youngster. I believe it permanently affected me.
From Active Comics #3 (1942):
Here is the Thunderfist story from Active Comics #2. Just click on the thumbnail.