Sorry Fred
I should have had someone else read my description to see if it was clear. You
have
and it wasn't. Because I was short of trainable mice,
I laid up the CF on plastic and cut it in the curve of the door. Then slid it
in
through the mechanism opening with lots of goop and held it down with various
sticks
until it cured.
I was happy with the small deflection under load but to add a belt to the
suspenders,
today I added one foot of reinforcement to the forward area (where I found that
almost all of the deflection occurs.) Big change. It is stiff! It can be done
if
the latch mechanism cover is removable as I did it all through there.
Tom
Fred Fillinger wrote:
> Hi, Tom --
>
> That sounds like it was a fun layup. I can see training the mouse to
> drag the cloth inside, but not pulling off the cling film on the way
> out! Or maybe you just cured it on the outside and bonded it inside.
> Anyway, my doors are assembled already, but not installed yet, so
> anything I do would have to be external.
>
> I don't know if 20 lbs is in excess of what the negative airstream
> pressure outside will do. I know from other aircraft, and while
> aluminum doors typically are stiffer than the ones we have, it takes
> less than 3/16" of bulge to give you annoying noise. But the seals
> also tend not to be as good. What you have just might work well.
>
> Regards,
> Fred F.
>
> > Fred
> >
> > I installed a strip of CF bid 4 layers thick (a short 5th layer in the
> > middle)
> > by 3/4" wide on the lower inside skin of the doors. They now flex about
> > 1/4th
> > to 1/3rd as much as they did before. The strips weighed 20 grams each. I
hope
> > that is stiff enough. The center of the door flexes about 3/16" with about
20
> > lbs force on the center of the door. The perspex has not been installed so
they
> > should get stiffer. What do you think? It would be easy to add a couple
> > layers.
> >
> > Tom
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