Assertion: aircraft's propeller | /r/HasProperty | damaged by fortuitous accident
Facets:
value: during a voyage in february
type: TEMPORAL
Source sentences:
text: By a fortuitous accident, the wooden propeller of two turns was damaged during a voyage in February 1837, and to Smith's surprise the broken propeller, which now consisted of only a single turn, doubled the boat's previous speed, from about four miles an hour to eight.