Zoller supercharger

[4] Although Arnold Zoller died in 1934, McEvoy displayed the Zoller supercharger (manufactured at their Derby works) at the 1935 Berlin show,[5] and it appears it was manufactured until the war, though from 1936 McEvoy had been developing a new supercharger they called the 'Velox' (also a vane type, but with variable boost).

[1] His patented linked con-rod design was adopted by DKW for their highly successful pre-war racing motorcycles.

[7] Zoller's supercharger patents (initially targeted specifically at two stroke engines) also date back to 1910.

[8] This patented design was updated in 1923 to a type similar to those sold by McEvoy, and used by car makers such as Lagonda (although they also used the Cozette supercharger).

The Zoller designed supercharged 2-stroke engine was reviewed in 1931, and this also mentions that a "well-known central European Motor Works" has produced a 3-litre 12 cylinder version.