Complex sentence: In many cases, such as remote controlled toys, the pinion is also the drive gear, although in the case of John Blenkinsop's "The Salamanca", the "pinion" was rather large.
Split into simpler sentences: In many cases, such as remote controlled toys, the pinion is also the drive gear. In the case of John Blenkinsop's "The Salamanca" the "pinion" was rather large.