Turcon Variseal W2 is a single acting seal consisting of a U-shaped jacket and a corrosion resistant Slantcoil spring. The Slantcoil spring in the Variseal W2 provides an almost constant load irrespective of hardware tolerances, eccentricity and seal wear.
January 1946: The origins of Heathrow Airport
Interesting the first flight mentioned in your original 1946 article was a Lancastrian "Stardust" which became famous when it disappeared on...