Every now and again, as the vibrations of the vessel failed to synchronize, a low muttering rumble came up from the deck members culminating in hoarse rattles of pipe-guards and loose cowls, and running aft in a long booming whine.
"Command"
William McFee
It was almost impossible to synchronize the three engines, and the beat was almost unbearable.
"The First Airplane Diesel Engine: Packard Model DR-980 of 1928"
Robert B. Meyer
So quickly did the black horse swerve that the calico could not synchronize.
"Lonesome Town"
Ethel and James Dorrance