In fact, the most prolific gravity related inventor mid-century was the aforementioned Thomas Townsend Brown. But people don't know that Townsend Brown was actually obsessed with time travel.
Steven sort of referred to himself as a time traveler. When I asked Brown's daughter, what Townsend would be up to if he is in fact a time traveler, this is what she had to say.
I know that sounds insane, but if you don't believe me, check out my videos on the great mid-century inventor Thomas Towns and Brown and with aviation journalist Nick Cook.