Assertion: engine | /r/HasProperty | air-cooled
Facets:
value: until 1999
type: TEMPORAL
value: commonly
type: DEGREE
Source sentences:
text: The smaller engines were commonly air-cooled and located at the rear of the vehicle; compression ratios were relatively low.
text: An in-line engine may be either air-cooled or liquid-cooled, but liquid-cooling is more common because it is difficult to get enough air-flow to cool the rear cylinders directly.
text: The engine is either air-cooled or liquid-cooled, but air-cooled versions predominate.
text: The engines were air-cooled until 1999, when Porsche started using water-cooled engines.