Thanks to all who have responded to my query. I would like to learn more about the torque curve as referred to in one of the responses. If I am to consider this as a viable approach, I need to know more about the torque curve of the engine I have. If anyone can direct me to a site that has these kinds of specs, I would very much appreciate it. I have considered a lovejoy direct coupling but have read a lot about using slower speeds with large and heavy flywheels for greater torque and momentum. That is why I was looking for information relative to my engine at idle speeds. I wonder where the point of diminishing returns would be operating the engine at 1800 rpm with a direct drive coupling to the generator off the pto end and a heavy flywheel on the other. Could this be done without causing too great a load on hp while gaining momentum for demanding loads on the generator? (starting large induction motors and the like) The primary use would be for power backup during power losses from hurricanes or other long duration events. As hurricanes are in the heat of the summer, I would want to run my air conditioner as well as water pump and hot water heater.

Thanks, Roger