Tags: Aircraft.
Grigorovich M-15 (alternative designation ShCh M-15 (Russian: Щ М-15) sometimes also Shchetinin M-15) was a successful Russian World War I-era biplane flying boat developed from the M-9 by Grigorovich. The M-15 was a smaller version of the M-9 intended to replace the latter however it was only built in small numbers due to shortage of the more powerful Hispano-Suiza engines.