KA-Series Propeller

[KA-Series Propeller]

I may be starting to understand this better, actually.

 

It seems really convoluted, but if I'm correct:

 

In the ordinates table, the percentages values (column headers) allow me to calculate an "X" coordinate value for a point in X-Y space.  To do this I would first calculate the blade width at the r/R section as a function of Diameter, Blade Count and Ae/Ao.  Then I'd determine an X-coordinate for the max thickness point based on it's percentage distance from the leading edge.  And finally I'd add or subtract from that value by the percentages in table 3B to determine for any r/R section where the ordinates are located along the X-axis.

 

For the Y-values I similarly work out toward the extremes from the point of max thickness using the appropriate percentages of total thickness for that section from Table 3B.

 

For a hypothetical 4-bladed 10-inch diameter propeller with an Ae/Ao of 0.70, that would give me the following coordinates:

 

Screen Shot 2016-11-10 at 11.41.37 AM.png

 

Assuming that's right, I'm still a bit confused on how to proceed:

The lines described by these curves appear to be in their own coordinate systems, no? The Back curve starts and ends at Y=0, where the Face curve starts at Y=0.08084 and ends at Y=0.13332.

 

And resolving this isn't a simple transformation since the fact that the Face curve starts and ends at different Y-values means that the length between its start and end coordinates is different from that for the Back curve, which has the same extent along the X-axis but starts and finishes at the same Y-position.  If you rotated one curve so all the end points were colinear, the ends wouldn't connect...

 

I think I'm getting closer here, but I'm still confused.

 

Oh, and I'm assuming that the face ordinate table ends at 0.5 because it's a straight line from 0.6 on out?

But what about determining the starting X coordinate for the point of max thickness for the Back curves when the distance of max thickness to leading edge values are null in the first table for r/R 0.7 and above?

sir i m also doing work on this propeller .. I m also not able to interpret the data given in table .. if u got the idea how to model ka 4 70 propeller .. can u help me out . CAN u tell me how interpret the data and how to incorporate this darta in CAD software for modelling it