Avro's Lancaster four-engine heavy bomber became Britain's iconic bomber of the war, just as the B-17 was for the US. Famed as the "Dam Buster" plane and as the workhorse of the saturation bombing of German cities, the Lancaster had a massive lifting capacity and decent performance. Since it was designed to fill a different strategic role than the American B-17, B-24 or B-29, the comparisons that are (and were) often made are unfair and misleading.

We do not have a Design Analysis of the Lancaster, but it is frequently mentioned in "World's Best" collections and in places like the "Britain at War" column in Air News. There are a number of images — both photos and drawings — available and there are a few articles that deal specifically with operations.

The immediate predecessor of the Lancaster was the Manchester two-engine heavy bomber.

To meet air transport requirements, the Lancaster was modified to the Lancastrian cargo/passenger transport. The wing, power plants and landing gear provided the basis for the York civil transport. The relationship between the Lancaster and the York is very much like the relationship between the Boeing B-17 Flying Fortress and the B-307 Stratoliner.