Useful illustration, John
Thanks for posting it.
MichaelG.
.
P.S. I was [slightly] amused to see that both drawings dimension the Radius at the bottom of the groove as a decimal fraction of the Diameter of the rope … Practical, I suppose, but it does seem odd draughting.
P.P.S. … More importantly, I note that both varieties have curved faces to the vee.
Edited By Michael Gilligan on 20/10/2015 13:12:08