REFLECTOR: Tips on stop drilling for cracks in the wind screen

[Christopher Martin]

Man did I screw up. I now have 6 holes in my lower front edge of the wind
screen. Should I use this process on each existing hole? I assume yes and
therefore should do each one with a slightly larger hole than the existing.
I will also fill them with silicon.

Sound right?

Christopher Martin
christophercmartin at earthlink.net
EarthLink Revolves Around You.


> [Original Message]
> From: John Overman <mooneydryver at yahoo.com>
> To: <christophercmartin at earthlink.net>; Velocity Aircraft Owners and
Builders list <reflector at tvbf.org>
> Date: 7/8/2007 11:44:27 AM
> Subject: Re: REFLECTOR: Tips on stop drilling for cracks in the wind
screen
>
> Don't ever stop drill cracks. The drill bit creates
> ridges inside the hole which are stress points that
> the hole was supposed to eliminate, thus allowing the
> crack to continue.
> Whenever you want to make a hole in plexi or acrylic,
> heat a rod (drill bit?) of the appropriate size till
> you  see a redish color then plunge it thru the
> plastic. It makes the hole and cauterizes itself.
> Works everytime.
>                           John
> --- Christopher Martin
> <christophercmartin at earthlink.net> wrote:
>
> > After seven years of flying and over 700 hours I
> > have developed 2 cracks in
> > the lower, pilot side of the front wind screen. I
> > stop drilled each with a
> > 1/16th inch drill and it appeared to work. After
> > about 40 hours I saw that
> > both cracks have continued past the stop hole by
> > 1/8th inch. I have now
> > drilled another stop hole at each extended crack.
> > 
> > Does anyone have any advice on this?
> > 
> > 
> > Christopher Martin
> > christophercmartin at earthlink.net
> > EarthLink Revolves Around You.
> > 
> > 
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