of the SB-2M-103 with polished wing surface. Tested on skis in March
Results were promising, but did not enter mass production because the SBbis3
was almost ready for production.
Speed 428km/h was demonstrated with total weight 5905kg, range reached 2170km.
See related aircraft on the Main SB page
"History of aircraft construction in the USSR", Vol.2 p.16