The third SE5 produced became, in effect, the prototype SE5a with a 200hp Hispano Suiza power plant and shorter span wings. After troubles with the reduction gear of the Hispano Suiza together with a general shortage of these power plants, the direct drive Wolsley Viper became the standard SE5a power unit. The SE5a built a fine reputation for strength, performance and general flying quality, which together with the Sopwith Camel was the main reason for the Allies gaining and maintaining air superiority during 1918

Model wingspan 168mm