RE: (ET) Mower deck noise level

[Rob Brockway <getractor yahoo com>]

I will say that my JD96 has much less vibration than the my E12M.  I think the deck has a stiffer construction.  The three motors operating independantly may tend to set up resonances and beat frequencies with each other.  There is noise from the blades hitting the air.

Rob Brockway NH

john briese <goodguyforsure hotmail com> wrote:

One thing I know for sure is that all the gas mowers around me, the whine
from the deck is the worse noise. I'm not sure we can complain!
John Briese


>From: "Markus Lorch"
>To: "'Elec-trak list'"
>Subject: (ET) Mower deck noise level
>Date: Tue, 31 Aug 2004 12:53:46 -0400
>
>Hi all,
>
>on our electric tractors the components that produces
>the most noise is the mower deck. Up to now I assumed
>we couldn't do much better with the blade technology,
>maybe reduce some vibration and add some dampening, but
>nothing that would make a huge difference.
>
>Now the other day I walked by one of the big Toro mowers
>with a large deck up front and two decks to the sides.
>The diesel engine on it was reatively quiet (still the
>loudest component) but it seemed to me that, even though
>it has way more blades (9 total I think), the mower noise
>level was significantly lower than on our elec-traks.
>
>Now my question: Does anybody know what they do to achieve
>the lower noise level, is it mainly dampening? Is it the
>overall mower deck design? Is the electric Ox mower deck
>significantly quieter than the ET one? Anybody knows?
>
>Markus
>
>
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