@Herr:
I never heard or read anything before about this “VI rocket bomb”. The article you quote mentions both the well-known V1 and the “VI”. Since a modified V1 was indeed flown by Hanna Reitsch but would be entirely unable to reach the height mentioned, I’m curious about the “VI rocket bomb”. Do you have any additional information on it?
To be honest, I’m not completely sure what the author meant by the “VI rocket bomb.” One possibility is that it was a reference to the V-1e; a manned variant of the V1.
Late in the war, several air-launched piloted V-1s, known as Reichenbergs, were built, but never used in combat. Hanna Reitsch made some flights in the modified V-1 Fieseler Reichenberg when she was asked to find out why test pilots were unable to land it and had died as a result.
Those are not the circumstances under which I’d like to be asked to fly something! :o But Reitsch did the test flight anyway and figured out what was wrong. Go here for more information about the V-1e.
However, it seems far more likely that she would have set altitude records flying rocket-powered aircraft than something powered with a pulse-jet, like the V-1 or V-1e. Granted, she test flew rocket powered aircraft such as the Komet. But that doesn’t get us any closer to understanding whatever the author meant by the “VI rocket bomb.”
Nazi Germany made a series of suborbital space flights in 1944. They achieved altitudes of 176 km / 109 miles. My impression is that none of these rockets were manned.