KitLog pro

Powered By Kitlog Pro v2.0

Arts Web Site
' style=
Date:  4-29-2018
Number of Hours:  2.00
Manual Reference:  
Brief Description:  Deburr front spar and spar cap doublers

I finished sanding the scratches and gouges out of the rear spar. It was slow going with 400 grid sandpaper, so I broke out my 20000 RPM hand held grinder. Using a ScotchBright disk I carefully worked the area until the gouge disappeared. A touch up with 400 grit then finish with 800 grit. I love that high speed grinder!

The HS-00913 spar cap doublers and the HS-00914 stringers are trimmed at each end and deburred. The front spar needs the same deburring as the rear spar, but this time I decided to figure out a way to use my bench grinder to shorten the process. I did the rear spar by hand and it took me about three hours to finish it.

I used the workbench as support and guided the spar along the ScotchBright wheel. It needed three or four passes before the surface roughness on the edge was acceptable, but it only took about 15 minutes to get the edges completely done. I finished the ends with my electric drill and a 2 in. ScotchBright wheel.

The bench grinder method was much faster than using the vixen file, but the edge was a little wavy. I attribute this to the little nubs on the edge from the stamping process. A vixen file can work on those nubs and flatten the edge evenly. The bench grinder method left a gradual rise where the nub was located. If I were building a show plane then I would invest the time to do it manually. I'm not, so I'll try to stick with the faster bench grinder and still get very acceptable, burr-free edges. The best part was I didn't make any extra work for myself by scratching and gouging the web. What a time-saver.

I still have to get the lightening holes deburred and that must be done manually. That's next on the list.
' style=

Front spar cap doublers and stringers on top and the rear spar on the bottom.

Front spar cap doublers and stringers on top and the rear spar on the bottom.

' style=

Front spar edges deburred with bench grinder and electric drill.  Much faster than before.

Front spar edges deburred with bench grinder and electric drill. Much faster than before.

' style=










Copyright © 2001-2024 Matronics. All Rights Reserved.