The 1st Katjusha Combat Use:
On 14th Jule 1941, seven BM-13 vehicles (battery commander - I.A.Flerov) completely wiped out Orsha railroad station (together with many German trains) during some seconds.

Legendary Katjusha

launcher rocket name rockets weight chassis fire time BM-13 1941 M-13, UK 16 7200kg track 7..10sec BM-13N 1943 M-13, UK 16 track 6x6 7..10sec M-8-6 M-8 6 not-self-propelled BM-8-12 M-8 12 motorcycle, motorsledge BM-8-36 1941 M-8 36 track 15..20sec BM-8-24 1941 M-8 24 STZ, T-40, T-60 15..20sec BM-8-48 1942 M-8 48 5485kg track 6x6 30sec BM-8-72 M-8 72 rail carriage M-30-4 1942 M-30, 31 4 not-self-propelled 5.. 7sec BM-31-12 1944 M-31, UK 12 7100kg track 6x6 7..10sec

rocket caliber range weight explos. year notes M-13 132mm 8470m 41.5kg 4.9kg 1941 M-13UK 132mm 7900m 42.5kg 4.9kg 1944 accuracy improved M-20 132mm 5050m 57.6kg 18.4kg 1942 M-8 82mm 5515m 8kg 0.64kg 1941 M-30 300mm 2800m 72kg 28.9kg 1942 M-31 300mm 4325m 92.4kg 28.9kg 1943 M-31UK 300mm 4000m 94.8kg 28.9kg 1944 accuracy improved

During the war, Soviet troops received about 2400 BM-8, 6800 BM-13, 1800 BM-31. 3374 Katusha launchers were built on track chassis (not including jeeps).