REFLECTOR:Fiberglass Instrument Panel Backing
Al Gietzen
reflector@tvbf.org
Tue, 2 Dec 2003 08:09:44 -0800
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I heard from one of the avionics vendors that there are problems with
using
fiberglass instrument panels like we use in the Velocity because some of
the
bigger, heavier instruments widen out the fiberglass holes over time
with
airframe vibration, hard landings, etc.
Have people flying had this problem? Are you using metal insert panels,
metal backing plates, carbon fiber backing, or other similar methods to
prevent the problem?
Aerotronics bonds aluminum sheet (I think .035) to the back of Velocity
panels on the custom panels; to add strength and to make them flat for
good alignment of the instruments. I block sanded the back of my panel
to get it flat and applied 3 ply of fine BID which gave a nice flat
surface and should have more strength (particularly fatigue resistance)
than aluminum.
Al
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<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
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<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>I
heard from one of the avionics vendors that there are problems with =
using</span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>fiberglass
instrument panels like we use in the Velocity because some of =
the</span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>bigger,
heavier instruments widen out the fiberglass holes over time =
with</span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>airframe
vibration, hard landings, etc.</span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'> </span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>Have
people flying had this problem? Are you using metal insert =
panels,</span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>metal
backing plates, carbon fiber backing, or other similar methods =
to</span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'>prevent
the problem?</span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DNimrod><span =
style=3D'font-size:11.0pt'> </span></font></p>
<p class=3DMsoPlainText><font size=3D2 face=3DVerdana><span =
style=3D'font-size:11.0pt;
font-family:Verdana'>Aerotronics bonds aluminum sheet (I think .035) to =
the
back of Velocity panels on the custom panels; to add strength and to =
make them
flat for good alignment of the instruments. I block sanded the =
back of my
panel to get it flat and applied 3 ply of fine BID which gave a nice =
flat
surface and should have more strength (particularly fatigue resistance) =
than
aluminum.</span></font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack =
face=3DVerdana><span
style=3D'font-size:11.0pt;font-family:Verdana;color:black'> </span><=
/font></p>
<p class=3DMsoPlainText><font size=3D2 color=3Dblack =
face=3DVerdana><span
style=3D'font-size:11.0pt;font-family:Verdana;color:black'>Al</span></fon=
t></p>
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