Empennage

Rudder  (4 hrs )

Continuing page 7-7 with Dimpling.   RH & LH skins, flanges on ribs and spar, stiffeners.
Finally ready to clean all parts with Acetone.   Primed both sides after several hours drying on one side, but could have sprayed within minutes

Lots of small parts.   I'll do scuffed areas of rudder skins tomorrow - just not sufficient room for all at once.   Cold outside, but able to heat shop in mid 50's.   Used high intensity halogen lights to directly warm aluminum during and after spraying.

Empennage

Rudder  (4.5hrs)

Completed finl drill (ream)  holes on RH skin started yesterday with LH side per page 7-7.

Then onto Step 5: put slight bend on RH and LH skin trailing edges with roll former tool.   This will hold edge tighter to TE piece when riveted.

Hard to get good pic of slight bend.  This is prior to Acetone cleaning and Priming.

Next deburr ALL holes in both skins, all stiffeners, etc.      That's a lot of holes !

When that was done,  used maroon scotchbrite to scuff all mating surfaces (those with Alclad affected during processing.   I'm following sequence of  DDSDAP  (Drill, Deburr, Scuff, then Dimple, Acetone to clean, and Prime).    Van's tech support has told me OK to either prime before or after dimples...but I prefer after so can scuff surfaces better vs recessed dimples.  Also primer won't get removed during dimpling.