cleco's ;)
There was no noticeable air noise (or drafts) on my machine with the
dome rivets around the door. They do wear/cut into the door flashing
though so I did have to add some thin foam weather seal. Recommend
allowing for some weather strip before fitting the door. Based on how
the CS rivets pull out of thin 20 thou aluminum, I would not expect
solid CS rivets to have any strength advantage over the avex. But I
haven't tested the solids.
There are structural aluminum Q rivets that retain the mandrel available
for about twice the price as avex if you really want stronger rivets on
the doorpost. They have a relatively narrow grip range. I do not
recommend stainless. The important thing is probably to just double the
number of rivets though. None of the other affordable blind rivets seem
to expand radially like the avex.
The top door post doublers are a MAM bulletin so I would consider them
compulsory rather than optional Ontario mods.
Ken
bransom@dcsol.com wrote:
Some time back the idea of flush riveting around the door perimeter came up
as desirable for a better seal and less air noise with the door closed.
And Wayne mentioned the precaution that avex flush (CS) rivets are not as
strong as regular dome avex.
I had put in solid flush rivets based on the above, but there are other
factors that come up later in the manual that I thought I'd throw in for
others considering this.
1. the rivets on the front of the door opening are into the door post and
must be blind rivets. So you can't put in solids, and if anywhere you want
shear strength it is on the door post. Therefore you are putting dome avex
here anyway. So maybe this defeats the purpose of putting in flush rivets
to reduce air nose for the whole rest of the door perimeter.
2. If one puts the door perimeter rivets in when MAM says to, they will
have to come out and be redone later when MAM gets you to putting in the
following. (This is noteworthy whether you are using solids or Avex.)
a) the corner braces (quarter round pieces at each corner of the door
opening)
b) the "Ontario Mod" doublers at the top of the front and rear door posts
-- note also on the rear doubler here, IMO it is nice to make it at the
same time as locating and installing the rear wing attach brackets and what
becomes bulkhead G.
c) the side seat belt mounts
-Ben/ 496R
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