Flight Simulator X Acceleration offered a sophisticated new option with the EH-101 helicopter. However, it has frustrated many Flight Simulator X enthusiasts with its tendency to have engine surges. The following information might help members to correct the problem, or at least make it better.
After locating the aircraft.cfg file for the EH-101. Typically found under the FSX installation at:
DRIVE:\Program Files\Microsoft Games\Microsoft Flight Simulator X\SimObjects\Rotorcraft\EH101\aircraft.cfg
Under the [Helicopter] section -
// Oscillating torque issue.
correlator_available = 1
governor_pid = 0.5, 1, 400, 0.01, 0.01
As always...make backup copies of files before editing them in case you want to revert. If you are not comfortable using a text editor to edit a configuration file, this might not be a change you can be comfortable making.