The procedure I followed is this:

1) create an Isosurface at a certain span.

2) create Polyline1 as an intersection between Blade High and the Isosurface.

3) create Polyline2 as an intersection between Blade Low and the Isosurface.

4) create Point1 as min(X) on Polyline1.

5) create Point2 as min(X) on Polyline2.

6) determine which of the two Points is the actual Leading Edge (this assumes one of

them is the LE, which should be the case). The LE is the point which has the larger X-

value of the two. Let's assume Point 1 is the leading edge, and it lies on Blade High.

7) create a User Surface as a Normal Offset to the Blade surface. Make sure this User

Surface is very close to the blade.

8) search for the "LE image" on Polyline3:

- create the expression "getdistance" as

getdistance=sqrt((X-(xc))^2+(Y-(yc))^2), where

xle and yle are the coordinates of the actual leading

edge point.

- create the User Variable "distance", defined using the expression "getdistance".

- the LE image is the Variable Minimum of "distance" on Polyline3.

9) get the leading edge metal angle from the line connecting the leading edge and its

image.