The Turbomeca TM 333 is a turboshaft engine designed for 5- to 6-ton-class helicopters. The TM 333 found its first commercial application on the HAL Dhruv.
TM 333 2B2 (for multi-engine applications)Presently,
HAL Dhruv employs two TM 333 2B2 engines each developing 825 kW at takeoff, with growth potential to 900 kW for subsequent versions. The
TM 333 2B2 is the initial production engine used on the Dhruv. Approximately 250 engines are installed on Dhruv and further production has been stopped as it is replaced by Shakti engine which is joint development by HAL & Turbomeca.
TM 333 2M2 (for single-engine applications)Another version, the TM333 2M2, is being developed with reduced power to be fitted on the Cheetak, the upgraded version of the HAL Cheetah (Lama), and the Chetan, the upgraded version of the HAL Chetak (Alouette III).
HAL DhruvHAL CheetahHAL ChetakType: TurboshaftLength: 1045 mmDiameter:Dry weight: 166.5 kgCompressor: 2 stage Axial compressor & single stage centrifugal compressorCombustors: Reverse annular flowTurbine: 2 low-pressure and 2 high-pressure stagesFuel type: ATF K-50Maximum power output: 801kW (1073.72 hp)Overall pressure ratio: 10:1Turbine inlet temperature: 1230°CPower-to-weight ratio: 