Old 3rd Jan 2019, 12:08
  #21 (permalink)  
tescoapp
 
Join Date: Oct 2004
Location: mids
Age: 54
Posts: 0
F = mass x acceleration.

You can work out yourself how the forces ramp up very quickly. Then add in fatigue SN curves and its no wonder things go twang especially going from Blue water into coastal.

https://www.amesweb.info/SinusMotion/SinusMotion.aspx

That was a comment why short roll periods are more of an issue than long periods.
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