 The oxygen turbopump rotates at 13600 rpm with a power of 3 MW while the hydrogen turbopump rotates at 34000 rpm with 12 MW of power.The total mass flow rate is 235 kg/s, of which 41.2 kg/s are of hydrogen.The main contractor for the Vulcain engines is Snecma Moteurs (France), which also provides the liquid hydrogen turbopump.