Assertion: hovercraft's fan | /r/HasProperty | propeller
Facets:
value: aka
type: OTHER
value: with a large number of blades
type: OTHER
Source sentences:
text: A fan is a propeller with a large number of blades.
text: One engine drives the fan (aka the impeller) which is responsible for lifting the vehicle by forcing air under the craft.
text: The hovercraft’s propeller also powers a specially designed fan, called an impeller, which forces the air above and around the hovercraft to go down below the vehicle, where a layer of high-pressure air forms a cushion above the ground.