From Captain Flight Comics #2 (May 1944), here’s “Captain Flight’s Microbe Plane” by Frank Stevens; since this technologically prescient (!) story is a whopping 20 pages long, I have decided only to display the first image on any page here that includes other posts, but if you click the link to the individual post, you’ll be able to read the whole thing:
[CLICK IMAGES TO ENLARGE]
Truth be told, I’m not sure if Stevens is really the artist here or not; I’ve read a number of other “Captain Flight” stories “by Frank Stevens” that don’t look anywhere near as good as “Captain Flight’s Microbe Plane.”