trimotor

assess, from the speed of the lumbering Ford Trimotor aircraft and his watch, the size of the fire;

通过笨重的福特三发动机飞机飞和自己的手表测算火势大小；

A quarter of his history of smokejumping, “Trimotor and Trail”, was devoted to the Mann Gulch episode.

在记录了他空降消防职业生的《TrimotorandTrail》一书中，曼恩峡谷事件就占了四分之一的篇幅。