Assertion: frigate's design | /r/HasAspect | wing tanks
Facets:
value: for a contrail-inhibiting chemical
type: PURPOSE
Source sentences:
text: The original B-2 design had wing tanks for a contrail-inhibiting chemical, alleged by some to be chlorofluorosulfonic acid, but this was replaced in the final design with a contrail sensor that alerts the pilot when he should change altitude and mission planning also considers altitudes where the probability of their formation is minimized.