No. 511 Squadron was a Royal Air Force transport squadron, active during World War II, the Berlin Airlift and during the sixties and early seventies. It operated, during its three periods of existence, aircraft such as the Douglas Dakota, the Avro York, the Handley Page Hastings and the Bristol Britannia.

The Avro York was a British transport aircraft developed by Avro during the Second World War. The design was derived from the Avro Lancaster heavy bomber, several sections of the York and Lancaster being identical. Due to the importance of Lancaster production, York output proceeded slowly until 1944, after which a higher priority was placed upon transport aircraft.