Back in the early Fifties however, a Stratocruiser flying to or from Honolulu (I forget which) had a runaway prop on the port outer (No 1). A runaway prop was a deadly serious matter as the drag was enormous and the prop uncontrollable.
This story is covered very well in "Air Disaster" Vol 4, by Macarthur Job, page 96. "The captain who refused to give up".