- Aviation Hendrickson was one of the very best combat pilots in the world, with a career spanning all of the Second World War and most of the Cold War.
- Business According to Blackhawk, Hendrickson has "the best business head among the Blackhawks."
- Geology When the Blackhawks traveled to the Moon, Hendrickson's billets were "surgeon and geologist."
- Hand-to-Hand Combat (Basic)
- Neuro-surgery Hendrickson long ago studied medicine, and once performed emergency surgery to remove a small radio receiver which had been wired into the nerves in Olaf's neck.
- Singing During their rare interludes of down-time, at the barracks on Blackhawk Island, and more frequently, on their return flights from their many international adventures, it was commonplace for the seven aviators of the Blackhawk Squadron to join their voices in a hearty chorus of their Blackhawk Anthem, often improvising new verses to fit the circumstances of that particular adventure.
- This version of Hans Hendrickson, including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- Per Blackhawk #85, 1st story, in early 1955, Hendrickson is 5' 10", 230 lbs.
- Hendrickson's nationality has seen some change over the years. At first, he was a Dutchman. Later accounts list him as West German and East German.
- For several years, Hans Hendrickson incorrectly believed that his elderly father had died in a Nazi concentration camp. The East German government found the old man alive, and used him to lure the Blackhawk Squadron into a trap. The capture was bungled by the officer in charge, and the Blackhawks escaped, but the senior Hendrickson was killed amid the shooting.
- In 1944 Hendrickson was implanted, by a Japanese war criminal surgeon, with a remote-control electrode at the base of his cerebellum. This was successfully removed a few weeks later. Hendrickson recovered very quickly.
- Not less than seven times in his lengthy career, Hendrickson was knocked unconscious with blunt-instrument head trauma. In 1951 he was shot with a submachinegun.
- Hendrickson smoked cigarettes until at least 1946.
- Hendrickson served briefly as Secretary of Commerce, in the ancient land of Fusang. He later briefly served in a Cabinet position in the democracy of Bolia.
- 202 Appearances of Hans Hendrickson (Quality Universe)
- 5 Images featuring Hans Hendrickson (Quality Universe)
- 10 Quotations by or about Hans Hendrickson (Quality Universe)
- Character Gallery: Hans Hendrickson (Quality Universe)
- Blackhawk #20 4th story
- Modern Comics #99
- Blackhawk #25
- Blackhawk #50
- Blackhawk #71
- Blackhawk #85
- Blackhawk #75
- Blackhawk #75
- Military Comics #30
- Military Comics #22, Blackhawk #22, Blackhawk #43, Blackhawk #45, Blackhawk #57, Blackhawk #84, & Blackhawk #85
- Blackhawk #52
- Blackhawk #88
- Blackhawk #97
- Modern Comics #52
- Blackhawk #43
- Blackhawk #68
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