S (stall place): On this place the turbine velocity is zero plus the impeller is rotating; the effectiveness from the stall place is least, close to 50%, which implies that fifty percent of the facility coming within the engine is dropped by friction and dissipated as warmth; at this point https://johnnymnkie.webbuzzfeed.com/34480703/the-smart-trick-of-torque-converter-clutch-that-no-one-is-discussing