On Feb 24, 12:18*pm, Mike125 wrote:
...Aircraft Windscreens Inc in CA was mentioned but I
couldn't find them on the web...

Aircraft Windshields Co. is in Los Alamitos, CA, their phone number is
562-430-8108. I don't know if they have L-13 sections, but it's
certainly worth ringing Judy up and asking her to check their catalog.
Like many old-school specialty houses, ACW hasn't shown any particular
need of a Web presence yet.

There are about 80 srews around the frame. That's alot of drilling. I
know we need special bits.

In my rather meager experience (Where practical, I would rather use
Liquid Nails to secure acrylic than fasteners in drilled holes), the
most important factor in drilling acrylic is temperature. My advice is
to not attempt to drill plexi unless your the entire part and also
your workarea are at or above a temperature of 70 degrees F. Other
than that, practice your technique using the special drills and scrap
acrylic, and see what works before you dig into your actual canopy
transparency.

One other thing to realize is that a lot of people only have
experience with old, weathered, and sun-beaten acrylic such as you'd
find in aged gliders. So they naturally assume that all plexiglass is
hard, brittle, and extremely crack-prone. In actuality, new acrylic
(or even old acrylic that has been kept in protective sheeting and out
of the elements) is noticably more flexible and forgiving. That's
certainly not to say that new acrylic is crack-proof, just that it
does give you a bit more margin than you might expect based on
experience with 35-year-old plexi.

Thanks, and best regards to all
Bob K.
www.hpaircraft.com/hp-24 - Now with all-carbon spars!