Yes, John, we have all those inspection holes, but if you look more
carefully you will notice that the inspection holes are located right
where the ribs converge just behind the front spar and just ahead of
the rear spar. The ribs block your view of the spar, except for a
small area that you can see through the lightening holes. Remember,
we now have the problem of intergranular corrosion rearing it's ugly
head in many of our spar cap extrusions. Go to http://en.wikipedia.org/wiki/Intergranular_corrosion
. Intergranular corrosion starts inside the cap and works it's way
out, like cancer. It does not start on the outside and work inward,
like rust. We need to inspect the entire spar caps to check for it.
In my opinion, metalized wings are a poor option.
Syd
On Nov 5, 2009, at 7:10 AM, john kuhfahl wrote:
2. You can take the metal off, or at least open it up, every 20-30
years--I just did it. 2-part self-etching epoxy primed
everything. This will last a long time! Plus we now have all those
inspection holes.
