"Breaking" edges of HS-609PP...

[RV8Astandard]

The first step in building the emp kit is to put a 1/32" radius on the edges of the rear HS spar doublers. I've not had any problems deburring edges of parts using a deburring tool and emory cloth, but this is a much greater challenge. Does anyone have any specific techniques and tool suggestions to share to do this task properly?

Thanks, JC

[728GD]

A file and a scotchbrite wheel. I cut the tapers with a 3 inch cut off wheel on a die grinder.

[Spike]

You could also use a table mounted belt/wheel sander. That makes really quick work of it too

[Jeff Moreau]

The first step in building the emp kit is to put a 1/32" radius on the edges of the rear HS spar doublers. I've not had any problems deburring edges of parts using a deburring tool and emory cloth, but this is a much greater challenge. Does anyone have any specific techniques and tool suggestions to share to do this task properly?

Thanks, JC

I simply ran the HS spar doublers over a belt sander and followed that up with a small mill file to break the edges.
After that I used fine emery paper to smooth out all of the mill and file marks.
Finally I wet sanded both doublers with 400 wet/dry sandpaper. this produced a nice satin smooth finish as is called for in the plans.
Certainly not the only way to accomplish the task but it worked well for me.