what different between sa-11 and sa-17 ???? this two type very looks like together
The 2K12 KUB (SA-6) system had several incremental releases, the 9K37 BUK (SA-11) and the 9K317 BUK-M2 (SA-17) systems.
Main difference is the increased number of target channels... ... while the KUB can track 2 targets parallel and engage one with several missiles, the BUK can engage several targets in the same time.
Also missile range is increased, KUB ~25km, BUK ~35km, BUK-M2 ~50km.
Hpasp Free SAM Simulator, "Realistic to the Switch" (U-2 over Sverdlovsk, B-52's over Hanoi, F-4 Phantoms over the Sinai, F-16's and the F-117A Stealth bomber over the Balkans.) http://sites.google.com/site/samsimulator1972/home
this two type very looks like together 
