Hi All,
--- beeteljeuse beelzebub <[EMAIL PROTECTED]> wrote:
> >
> >--- In [EMAIL PROTECTED], "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> > > I have access to a generator powered with a DD
> 2-71. Does anyone
> >have any
> > > experience with this engine? I have been told
> it is possible to
> >build a
> > > muffler that will work on a DD so the neighbors
> are not so willing
> >to storm
> > > your door with sythes and torches. From my
> experience a DD is the
> >best way
> > > to turn Diesel fuel into noise.
> >
True, also put a muffler on the intake as a
lot of the noise comes from there.
I used to own a british seagull outboard and
as a sailor, the real kind , not military, I cut the
noise from it 75% by putting a 2' rubber radiator hose
on the intake.
>
>
> I have only a little experience with these engines,
> working on a drill rig
> powered by one. it was perhaps the loudest engine I
> have ever heard. It was
> loud through earplugs.
> Have you heard about black noise generators?
> designed to produce sound of a
> frequency and amplitude which precisely negates the
> sound your engine makes.
> They use em on army helicopters. No idea if this is
> do-able for you.
> BA.
Also called noise cancelling or anti noise. It's
done by using a microphone to pick up the sound,
amplify it, change it to be 180 degree out of phase
then output thru a speaker nullifing the noise, or at
least most of it.
Having lived aboard a sailboat anchored out for
20+ years the noise from battery charging from ICE
gens drove me crazy so I started building wind and
tidal genorators for myself and other liveaboards.
If you are going to use an ICE to genorate build a
noise box to put it in with heavy walls.
Hope this helps,
jerry dycus
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