Engine performance test constant speed vs Variable speed governor

[pulla reddy]

how can i test Constant speed governer engine in N mode of Eddy current dyno. Normally we are doing in N mode but if we go more than rated immediately hunting happened. Then which mode is suitable tell me. N mode / I mode / T mode

 

[gruntguru]

Why do you want to test at higher than rated speed? Output usually drops dramatically above rated speed and reaches zero at high-idle which is usually only a little above rated speed. (If the governor is electronic, high-idle will be the same as rated speed)

Use T mode if you want to test the engine at various loads. Once the load exceeds the rated output, the speed will begin to drop.

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