"Corky Scott" wrote in message
...
On Fri, 15 Jul 2005 02:20:37 GMT, David Findlay
wrote:

I'm in the early stages of the homebuilding disease :-P and still don't
know exactly what I want to build, just that I want to build something.
I'm interested to know what people have done in their aircraft to reduce
the interior noise level? Can such noise insulation be added to plan or
kit built aircraft without too much difficulty? Is it possible to reach
car or commercial airline jet noise levels in a homebuilt? Thanks,

David

There's a LOT you can do to reduce noise in the cockpit. Most of it
has to do with proper use of insulating materials but there are other
things like taking extreme care in sealing things like doors and
windows. Using double panes in the side windows will help. Using a
thicker plexiglass for the windshield makes a difference and adds
value in bird strike protection. Putting an effective muffler on the
engine will help too. All this costs money and adds weight.

SNIP

Corky

======================
While building my RV-4, experienced builder/flyers strongly recommended that
I add very lightweight angle aluminum stiffeners along the long expanses of
unsupported aluminum sheet. These very thin strips of right-angle aluminum
stiffeners are intended to reduce the oil-canning and reduces noise from the
slipstream drumming along the sheet metal expanses.

Michael Pilla