The Zurcon Scraper DA 22 is a double-acting polyurethane wiper for closed groove installation. Significant improvements are achieved regarding the profile geometry and material used if compared with conventional elastomeric scrapers. The scraper lip is designed in a particular way that it reliably scrapes off the dirt but leaves a residual oil film on the rod, which is required for correct operation. The radial squeeze is sufficient to remove particles, dust and water.
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...