Originally Posted by
Kontact
You are conflating two completely different kinds of "straightpull" and two different kinds of offset.
The straightpull in the OP refers to spokes that are laced with no flange offset.
But you are referring to spokes that have no elbow, the opposite of J bend.
Some straightpull laced hubs use straightpull spokes, some offset lacing hubs use straightpull spokes, and most J-bend hubs can be laced offset or straightpull. Straightpull spoke hubs generally are good for a single lacing angle/cross (e.g. straight or 2 cross). While J bend hubs will usually let you lace them the straight, 1x, 2x, 3x etc. I think there is also a lacing between straight and 1x.
The offset in your diagram is more like a flange diameter issue, but really you have to deal with it directly by correcting the product of the calculation as you would for added nipple washers.
I read the OP to mean calculating for straight pull spokes as in no elbow. I still don't see anything, even upon re reading about no flange offset, which I assume means spoke holes directly across from each other.
My response was to FB who omitted the spoke head offset necessary for the calculation.
Also, it appears what you are calling straight pull with regard to J bend spokes is what the rest of the world refers to as radial.