In his 1958 juvenile novel Have Spacesuit, Will Travel (I read it years later as a tween), Robert A. Heinlein described this as a "skew-flip maneuver" that woul

In his 1958 juvenile novel Have Spacesuit, Will Travel (I read it years later as a tween), Robert A. Heinlein described this as a "skew-flip maneuver" that would get someone from Earth to Pluto in five days at 8G (!). And apparently E.E. "Doc" Smith described it even earlier. https://en.wikipedia.org/wiki/Have_Space_Suit%E2%80%94Will_Travel https://en.wikipedia.org/wiki/Have_Space_Suit%E2%80%94Will_T... https://scifi.stackexchange.com/questions/261753/what-was-the-earliest-reference-to-turnover-maneuvers-for-constant-boost-spacesh https://scifi.stackexchange.com/questions/261753/what-was-th...