Assertion: engine | /r/CapableOf | suffer frequent failures
Facets:
value: unacceptably
type: MANNER
Source sentences:
text: The need for Stirling engines to run at very high temperatures to maximize power and efficiency exposed limitations in the materials of the day, and the few engines that were built in those early years suffered unacceptably frequent failures (albeit with far less disastrous consequences than boiler explosions).