The Turbomeca TM 333 is a turboshaft engine manufactured by French company Turbomeca and designed for helicopters weighing 4-5 tonnes. It first ran in August 1981 and was introduced commercially in the mid-1980s. It was the first Turbomeca engine to use a single stage turbine, making it more compact than its predecessors. In its original design, the engine was rated at 750 continuous horsepower, though it was designed to allow for future power increases, and the later 2B2 variant made 1,100 horsepower. Variants TM 333 2B2 The TM 333 2B2 powered early versions of the HAL Dhruv, though it was replaced by the Shakti engine, which was jointly developed by HAL and Turbomeca. TM 333 2M2 The TM333 2M2 is used on the HAL Cheetal and Chetan, upgraded versions of the Cheetah and Chetak, respectively. Applications HAL Dhruv HAL Cheetah HAL Chetak Specifications (TM 333 2M2) See also References External links Turbomeca TM 333 TM 333 1970s turboshaft engines Mixed-compressor gas turbines