Tschanz drive
The Tschanz drive or Oerlikon single-axle drive is a fully sprung single-axle drive for electric locomotives named after its inventor Otto Tschanz or after Maschinenfabrik Oerlikon. The drive was not widely used because its competitor, the Buchli drive, was cheaper and lighter. Construction. The Tschanz drive is a fully sprung drive, which means that the motors are housed in the sprung part of the locomotive and are thus less exposed to shocks from the rails. Also, the shocks from the wheelsets to the rail are reduced because there is less unsprung weight on them. The traction  motor is firmly mounted in the locomotive frame and drives through a single-stage gearbox to a gear that is located to one side of the wheel. The power transmission from this gear to the axle is done with a cardan shaft which has universal joints at both ends and passes through a hollow axle. The Tschanz drive was not widely used because its competitor, the Buchli drive, was cheaper and lighter. Use. Rolling stock on which the Tschanz drive was used include: