Harry Walton's "Subcruiser" (short story, action, free): Foiling a warship hijack

This is a "spy aboard a warship" story. Earth & Venus are at war, earth has a new type of space ship whose sample Venusians want for reverse engineering, & they've recruited an officer of earth to help get the ship. Hero, will, of course, foil the conspiracy.

Fact sheet.

First published: Astounding, May 1941.
Download full text as part of the scans of the magazine it originally appeared in.
Rating: B.
Among the stories from Astounding/Analog issues edited by John Campbell.