Chapter 23 IO360 Engine Overhaul Video

As a reference:
IO360 Engine overhaul video

2019/09/25 filling and sanding the bottom

Micro was applied to the bottom of the strakes, fuselage, cowl mating edge and gear legs.  The first layer of micro doesn't adhere very well if it is to dry.   Any micro applied later needs to be slightly wet or it rolls up and doesn't adhere well either.  To dry and it wont stick, to wet and it will be heavy and a little harder to sand.

I like using a flashlight in the dark (bottom photo) as an alternative to a guide coat.  In my opinion, after doing this for awhile, it becomes easier to see and then feel the imperfections.   

Coarse grit paper (36,40, 80 grit) and tools are used to knock down the peaks and ridges, then finer grit is used to smooth the coarser grit marks.

The dips/peak imperfections here are less than .04".  Another round of fill/sand in this area, then the barrier coat will go on.

2019/09/01

Small amounts of pour foam was easy to apply around the leg, fairing and cover.

Found the cover needed to be trimmed back a little in order to be able to remove it after adding the leg fairings.

Some pour foam was added/sanded to eliminate some low spots on the sump fairing.

After glassing the fairing and sumps, rather than use peel ply I applied micro (fill) to the tacky glass and epoxy thinking this will save a step and eliminate some waste.  Temp was mid-90's, using West 209 hardener which cures relatively fast at this temp..