|Designer||Dimitry P. Grigorovich|
|Introduction||mid 1916 |
|Number built||~80 |
|Engine||150hp Hispano-Suiza vee|
|Armament||front flexible MG|
The Grigorovich M.15 was a development of the successful M.9 with smaller wings and less weight and a 150hp engine. The increase in power-to-weight ratio made the M.15 a useful flying boat, but it supplemented rather than replaced the M.9 in service. Most -- but not all -- were used as trainers. 
For more information, see Wikipedia:Grigorovich M-15.
- Durkota, p.280.