Royal Aircraft Factory R.E. series

The Royal Aircraft Factory R.E.1 was a refined version of the B.E.2, originally designed to be light enough to carry armour plating without reducing its performance but that was actually used as a test bed for experiments in stability

The Royal Aircraft Factory H.R.E.2 was a floatplane biplane with some similarity to the B.E.2, developed at the Royal Aircraft Factory in 1913-14.

The Royal Aircraft Factory R.E.3 was a two-seat reconnaissance aircraft similar to the R.E.2 with its floats removed but with a more powerful Austro-Daimler engine.

The Royal Aircraft Factory R.E.4 was a design for an aircraft capable of operating from small fields surrounded by high trees.

The Royal Aircraft Factory R.E.5 was the first aircraft in the Factory's Reconnaissance Experiment series to enter production, although only in small numbers.

The Royal Aircraft Factory H.R.E.6 was a design for a three-seat floatplane biplane.

The Royal Aircraft Factory R.E.7 was based on a high altitude version of the R.E.5. Although it was produced in relatively large numbers the Royal Flying Corps never really had a use for the aircraft and its front line career only lasted for six months in the first half of 1916.

The Royal Aircraft Factory R.E.8 was the standard Corps Reconnaissance aircraft of the RFC and RAF in the second half of the First World War and superseded the B.E.2c and B.E.2e, the much maligned aircraft that had performed that role since 1914

The Royal Aircraft Factory R.E.9 was a version of the R.E.8 that had its unequal span wings replaced with the two-bay equal span wings of the B.E.2d.