Page 241 - Handbook of Energy Engineering Calculations
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the engine is held at 1400 r/min or below, stalling of the engine may occur
               easily when the load is increased. Such an increase will cause engine speed to
               reduce,  resulting  in  a  decrease  in  torque  and  causing  further  reduction  in
               speed until the engine finally stalls abruptly, unless the load can be quickly
               released.

                  Figure 12b shows performance curves for a typical high-speed engine with
               maximum power output at top speed. The torque curve for this engine is flat
               and the engine is not desirable for industrial or agricultural type installations.
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