Destroying the dogma: lightweight crankpulleys

[i3igpete]

if you recall from vibration analysis, mode shapes are unitless. all they have is frequency (listed at the top of each mode shape as i've presented) and direction (X,Y,Z,Xrot,Yrot,Zrot). the rotational speed of the crankshaft doesn't factor into the natural frequency, only the force-response.