Sailplane Construction Project Session #155
This afternoon I made up an all new mix of satin
Klass Kote and shot the bottom of the wing around 1:30 p.m. Later on this
afternoon, I decided the wing would be dry enough to spray the top. So
around 5:00 p.m. I shot the top of the wing. When I had finished spraying
the top, I took the picture below before the atomized Klass Kote epoxy
particles had settled out of the air in the closed garage.
A little later when I went out and checked on how
the wing was drying, I took this picture in an attempt to show you the
beautifully smooth satin Klass Kote finish on the top of the wing.
I want to share with you a problem I
encountered with the satin Klass Kote. Remember last Friday I sprayed the
bottom of the stab. Since I let it dry overnight, I sealed the remaining 6
ounce Klass Kote mix in a jar and put it in the refrigerator. Saturday
morning I removed the mix from the refrigerator, gave it a couple of
hours to come up to room temperature, and then added just a touch of reducer
to help thin the mix. I took the time to thoroughly stir up the mix. Then I
mounted the stab on the second support fixture and sprayed the top of the
Here is problem I encountered: As late as
yesterday evening the dry coat of satin Klass Kote on top of the stab
was not as satin as the rest of the model's components #$@&? (it had kind of
a shiny or semi gloss sheen). The only thing I can come up with as to why
is that the mix had been placed in the refrigerator overnight and it had a
little additional thinner added, which by the way according to Nate
Dickerson was supposed to be OK.
I kept looking at the top of the stab and
debating about what to do for a long time. Since I was never going to accept
this miss matched sheen of the top of the stab, I remounted the stab on the
second support fixture and resprayed the top of the stab this afternoon in
between the time I sprayed the bottom of the wing and the top of the wing.
As you can see below, by respraying using the fresh satin Klass Kote I had
mixed up for the wing, the satin finish of the top of the stab now matches
the rest of the model's components. I will call Nate Dickerson (Mr. Klass
Kote) tomorrow and see if he knows what the problem could possibly be.
Now I will take my time and spend this coming
week going through all of the final installations and assembly on the Comet
Sailplane. I will perform a weight and balance to check for meeting the SAM
minimum weight requirement and to check for the proper CG location. So I
will have a couple more reports to send out before I begin the Sailplane's
all important flight test program. But at least I am finally finished with
all the covering, painting, and finishing
(I made this Report No. 155a because it is
follow up to Report No. 155)
Below is the chemist's findings that Nate
Dickerson sent me today. Thank you Nate for taking the time to have this
looked into for me and the other models that are considering using your
----- Original Message -----
Sent: Wednesday, August 19, 2009 1:29 PM
Subject: Re: Message from Tandy Walker
Hello again Tandy...
Thanks for the write up on the follow
We did check in with the chemist and
he stated that the suspended additives that facilitate the "flat satin
affect" were chemically altered and re-aligned (i.e. suspended at a
different level in the vehicle) by both the addition of reducer, and, by the
continuing (ever if ever-so-slight) curing of the mixture while kept at the
lower temperatures in the fridge…
We really have not done very extensive
research as to the sheen affect of the "kept" mixture - but rather more on
the attributes of the mixture once it is re-established at room temperature
and applied and cured. We do know that the attributes
that make epoxy such a strong, protective coating are still in tact.
This truly has been a teaching point
for us and we plan to conduct some additional research and try to determine
if there are any additional work-arounds. In the mean
time, we recommend to users who are sensitive to the gloss levels of the
dried film, - to please, not suspend the mixture at lower temperatures, but
rather re-mix additional batches as needed...
Tandy, I wanted to take a moment to
thank you again for your excellent reporting on this project.
It is users like you that allow us to continually improve our product
offerings to the industry.
P.S. - one Note... We are
in Minnesota - not New Jersey!!!
Diversified Solutions, LLC.
Klass Kote Quality Coatings Division
5932 Chicago Ave S. Minneapolis, MN 55417
Web: http://www.klasskote.com -
Ph: 612-243-1234 - Fax: 612-216-2121
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