With mine, the entire radius'd portion is not extended out below the body
of the plane, only a fraction of that.  I could go back and remeasure the
chord of protrusion, but the amount extended would change based on the wood
I am planing.  As someone else said, its cutting Fritos, so maybe only 1/2"
is cutting.  maybe more, maybe less, but its deeper at a 2" radius on a
scrub than a 8" radius on a smoother, but much narrower, for the same
amount of work involved.

 Kirk in HMB, dunking stuff in evaporust between telephone calls.

On Fri, May 7, 2021 at 12:31 PM Don Schwartz  wrote:

>  i.e., how much does the center of the edge project beyond the corners of
> the iron? 1/16th, 1/8th etc. Bigger on a block
> plane or scrub, smaller on a bench plane. Easier to visualize and
> check IME. Exact measurement not so critical.
>
>

-- 
Kirk Eppler