Rocket Launchers:
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
 
Katjusha-linkki 
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).