streamliner

He turned out to be a brilliant expert on timber and on the lumber business in general, a specialist on soils, and an amazing streamliner of earth-moving work.

[…] the three streamliners, still on their 29½ hr. schedule, start at 9.40 a.m., also turn-and-turn-about, and so arranged that the 9.0 and 9.40 a.m. departures are by different routes each day; ….