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LAV-150 S
This was announced in 1981 with two vehicles delivered for evaluation in the LAV competition late in the same year. Both vehicles had a two-man turret, one armed with a 90 mm CMI Defence Mk III gun and the second with a 25 mm M242 ATK Gun Systems Company Chain Gun, both having a 7.62 mm coaxial and a 7.62 mm anti-aircraft machine gun. The LAV-150 S is 46 cm longer than the LAV-150, which gives additional internal space, increasing the payload by 726 kg to give a total payload of 3,357 kg. The wheelbase has been lengthened and the suspension strengthened, giving an improved ride across country.
Additional vehicle improvements include a new transfer case giving better grade-climbing performance, a new hydraulic boost brake system with an electrohydraulic back-up and an improved cooling system with increased fan efficiency and increased cooling capacity. Further development of the LAV-150 S has resulted in the LAV-150 ST (with the ST standing for stretched and turbocharged), which is the most recent production model.