The new 500 mm bore/2050 mm stroke design was planned for
release in two versions: the conventional ‘mechanical’ Sulzer RTA50C
and the electronically-controlled Sulzer RT-flex50C. Each type will
offer a maximum continuous rating of 1620 kW/cylinder at 124 rev/
min, five-to-eight-cylinder models covering a power range from
5650 kW to 12 960 kW at 99 rev/min to 124 rev/min. Output and
speed ratings target Handymax and Panamax bulk carriers, large
product tankers, feeder containerships and medium-sized reefer vessels.
Both versions will incorporate Sulzer TriboPack measures for enhancing
piston-running behaviour, underwriting low cylinder wear rates for
three years between overhauls, and minimizing cylinder lube oil
consumption (see section below)