Stuart Plans, I dislike under constrained dimentions

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HSM01

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Feb 4, 2025
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I though I was beginning to understand Stuart D10's plans. I was incorrect.
Bare minimum dimensions are given. One would have thought paper was expensive!
I also work in thousands and the conversions from fractions is a PITA. I guess conventions were different back when.

Sometimes I failed to inspect the related sketches on the plans.
I am at the beginning and working on the sole plate.

I was tempted to lay out the centerlines for the standard (V-shaped cylinder support) using the distance between the bearing centerlines.
It didn't look right.
Then I noticed the centerlines between the bore given in the steam pipe layout as 1-13-32 or 1.565".
If I calculate the distance between centerlines on the throws of the crankshaft, it's 1.406".
One is .159 off or the crankshaft throw is not on the centerline of the bore.
I am not getting this. Does anyone care to help me out on this issue?
Thanks
Rick
 

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I must have typed it into Excel incorrectly. I am going to see how it works out on my layout.
 
That was it. I consider it a success if I hadn't messed up the part.
The sign of a good mechanic, is they stop right before they mess something up.
I got lucky on this one. Appreciated the help.
 

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