[Public-List] Silent Running acoustic coating

[Gordon Laco]

Good morning - 

Unfortunately the only thing that really damps engine noise is mass; lead
combined with sound absorbing insulation.  No painted on compound will have
a measurable effect on the reduction of noise.

Lead is required to stop the deeper sound; the insulation stops the higher
sounds.  Whatever you do the knock of the diesel will travel through the
fabric of the boat.

The good news is that if you line the motor box with thick sound barrier
incorporating a lead sheet such as used in power cruisers the motor will be
somewhat quieter.  But I can't imagine any paint on coating having much
effect.

Sorry to be so negative...

Gord
#426 Surprise


> I have been looking for a way to reduce the noise of the engine (a
> Kubota 950 diesel) in the cabin. Silent Running has been recommended
> to me by an Industrial Plastics distributor. The claims on the Silent
> Running website are impressive, but it is not cheap (about $130 a
> gallon).
> 
> http://www.silentrunning.us/index.html
> 
> Does anyone have any experience with this product? Or can you
> recommend an alternative?
> 
> Thank you.
> 
> Bernard Rochet
> #608
> 
> 
> 
> 
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