Grigorovich (design bureau)

Grigorovich was a Soviet aircraft design bureau, headed by Dmitry Pavlovich Grigorovich.

Aircraft

M-1 - experimental observation flying boat, 1913
M-2 - biplane flying boat, 1914
M-3 - biplane flying boat, developed from the M-2, 1914
M-4 - biplane flying boat, developed from the M-3
M-5 - reconnaissance biplane flying boat, 1914
M-6 - biplane flying boat
M-7 - biplane flying boat
M-8 - biplane flying boat
M-9 - biplane reconnaissance flying boat with machine gun, 1915, with cannon, 1916
M-10 - flying boat, 1915
MK-1 - three-engine biplane reconnaissance-bomber seaplane, 1916
M-15 - biplane reconnaissance flying boat; scaled-down M-9, 1916
M-16 - biplane reconnaissance flying boat for winter conditions; developed from the M-9, 1916
M-17 - flying boat; re-engined M-15
M-18 - flying boat; re-engined M-15, never finished
M-19 - flying boat; scaled-down M-9, never finished; 1918
M-20 - flying boat; refined M-5, 1916
M-22 - reconnaissance flying boat - 1922
M-23bis - biplane flying boat developed from the M-9, 1923
M-24 - biplane reconnaissance flying boat, 1923
MRL-1 - long-range reconnaissance flying boat, 1925
MR-2 - long-range reconnaissance flying boat, 1926
MR-5 - long-range reconnaissance flying boat, 1929
ROM-1 - long-range reconnaissance flying boat, 1927
ROM-2/MR-3/MDR-1 - long-range reconnaissance flying boat, 1929

M-11 - biplane flying boat-fighter, 1916
M-12 - improved M-11, 1916
M-13 - naval fighter project, 1916
M-14 - naval fighter project, 1916
PI-1 - fighter with cannons and retractable gear, 1930..1933, developed from the I-Z
I-1 - fighter, 1924; first land-based design
I-2 - fighter developed from the I-1, 1924; first Soviet fighter to enter service in large numbers
I-Z - single-seat fighter, 1931
I-9 - twin-engine single-seat heavy fighter project, 1932
I-10 - single-seat high-speed fighter project, 1933
IP-1 - cannon fighter, 1934
IP-2 - re-engined IP-1, never finished
IP-4 - downsized version of IP-1, 1934

;For Polikarpov: