These charts show the use over time of each WWI French aircraft. The data is derived from escadrille records in Davilla and Soltan's French Aircraft of the First World War. While it contains little data on the arrival and retirement of each type, we do benefit that each escadrille changed names when it changed types. For instance F(arman)1 changed to AR1 when they traded their Farman F.40s for A.R.1s in April 1917. Such changes did not occur on a knife edge. Furthermore, it is difficult to know when an escadrille transitioned from one type to another by the same manufacturer, e.g. SPAD 7 to SPAD 13. Hopefully such uncertainties will average out over the large amount of data. Numbers were sometimes adjusted up or down a percent to account for rounding errors. The types are sorted with each season from most-used to least-used planes.
- Types within a Breguet 2/4/5 flight were frequently mixed.
- Caudron R.4s may be mixed in small numbers into a bomber or reconnaissance flight starting in Summer 1916.
- Some Sopwith Strutters were used in a fighter role, but it is impossible to tell how common this was in proportion to their more common reconnaissance and bombing roles.
- Starting in spring 1917, Letord 1 aircraft would commonly be mixed in with other aircraft.
- Starting in summer 1917, Letord 2 aircraft would commonly be mixed in with other aircraft.
- Starting in Winter 1917-18, Letord 4 & Letord 5 aircraft could be mixed in with other aircraft.
- Caudron R.11s may be mixed in small numbers into a bomber or reconnaissance flight starting in Spring 1918.