I checked natural frequency to make sure nothing would vibrate at the same frequency as the engine. First in CAD, secondly by “plucking” the same corners as in CAD and measuring frequency. Everything seemed to be 614hz or higher, which is good! Less worries of vibration and fatigue. Trying to stay as far above the natural frequency of 4 piston engine at 7400RPM as possible, which is 247hz.
