I like the Fluidamper. Not suseptable to harmonics at different RPMs. Got familiar with them mainly on Detroit Diesel engines. On the V12, V16, V20 and V24 engines they used 2 dampers bolted to the hub. Long crankshafts in those engines. Some used 2 or three block bolted together and the crankshafts were bolted together. The 20V used three blocks, 2 6V and an 8V. Now these were not standard 6V or 8V blocks. They came out of the same castings but were machined differently. One 6V block was the front 20V block and the other was the rear 20V block. The 8V block was the center 20V block. These long crankshafts needed all the harmonic damping that could be supplied. These engines also run at 100% duty cycle for months at a time. In mine haul trucks they still have a ttough time with heavy loads and up and down the rev range. Most of these do drive a large generator to power large electric traction motors. The harmonic dampers get a workout.
