Re: Did the Auto-destruct partially malfunction in TSFS?
They probably did it for the dramatic effect of the secondary hull burning up in the atmosphere, with the crew watching.
Technically speaking, the entire ship should
have been obliterated, for the reason you mentioned.
Rimmer, on what period of history to live in-
“Well, It’d be the 19th century for me, one of Napoleon’s marshals.
The chance to march across Europe with the greatest general of all time and kill Belgians” - (White Hole).