Wait a minute.
I read that although liquid boosters have a higher Isp than the SRBS. The SRBs put out over twice the thrust of a RD-180 engine. This was the main reason why Energia/Buran used four boosters.
Space/Science » in reply to re: What's the perormance differences between SRBs and liquid fueled replacements?
I read that although liquid boosters have a higher Isp than the SRBS. The SRBs put out over twice the thrust of a RD-180 engine. This was the main reason why Energia/Buran used four boosters.