0:04
Petrol engine revs - thin, fast. (1)
0:02
Recipro saw - quick rev (3).
0:02
Recipro saw - quick rev (2).
0:03
Recipro saw - quick rev (1).
0:03
Old, heavy handrill in action - quick rev (2).
0:10
Old, heavy handrill in action - two long revs.
0:07
Old, heavy handrill in action - quick rev (1).
1:42
Racecar track ambience - car pass-bys, revving engines.
1:55
Street sweeper - bristles sweeping, slow driving.
1:00
Street sweeper - start up, engine sputter, rev away, sweeping.
0:17
Steam machine start - spinning up, hiss.
0:05
Pencil sharpener motor - three short whirs.
0:19
Pencil sharpener motor - four medium whirs.
0:09
Pencil sharpener motor - long whir.
0:05
Small servo motor - tinny whir. (5)
0:02
Small servo motor - tinny whir. (4)
0:02
Small servo motor - tinny whir. (3)
0:03
Small servo motor - tinny whir. (2)
0:02
Small servo motor - tinny whir. (1)
0:01
Servo motor, stressed - medium whir. (19)