| S.E.4 | |
|---|---|
| Role | Scout aircraft |
| National origin | United Kingdom |
| Manufacturer | Royal Aircraft Factory |
| Designer | Henry Folland |
| First flight | June 1914 |
| Retired | 1914 |
| Primary user | Royal Flying Corps |
| Number built | 1 |
The Royal Aircraft Factory S.E.4 was a single-engined, single seat biplane designed and built at the Royal Aircraft Factory just prior to the start of the First World War. Intended to be as fast as possible, it recorded a speed of 135 mph (217 km/h), which made it the fastest aircraft in the world in 1914, but no production followed and it was soon written off in a crash.