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#1
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Noise and generators
On Fri, 11 Jun 2004 10:53:28 -0400, "Doug Dotson"
wrote: Fron what I understand, the higher frequency noise of the 3600 RPM gensets is easier to dampen than the lower frequency of the 1800 RPM units. =========================================== That has not been my experience for what its worth. My last boat had a 3600 RPM gas Kohler with a decent sound shield and water lift muffler, shock mounted under the rear deck. Inside the cabin with the A/C on, the noise level was barely noticeable. Outside in the cockpit however I found it objectionable. Not really ear splitting or anything, just annoying. It had kind of a frantic over reving quality to it that I have not noticed in 1800 RPM units. |
#2
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Noise and generators
Not sure what you mean by a "frantic over reving quality"? Sounds
like it wasn;t working properly, perhaps a govenor problem. Doug s/v Callista "Wayne.B" wrote in message ... On Fri, 11 Jun 2004 10:53:28 -0400, "Doug Dotson" wrote: Fron what I understand, the higher frequency noise of the 3600 RPM gensets is easier to dampen than the lower frequency of the 1800 RPM units. =========================================== That has not been my experience for what its worth. My last boat had a 3600 RPM gas Kohler with a decent sound shield and water lift muffler, shock mounted under the rear deck. Inside the cabin with the A/C on, the noise level was barely noticeable. Outside in the cockpit however I found it objectionable. Not really ear splitting or anything, just annoying. It had kind of a frantic over reving quality to it that I have not noticed in 1800 RPM units. |
#3
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Noise and generators
On Sat, 12 Jun 2004 00:52:25 -0400, "Doug Dotson"
wrote: Not sure what you mean by a "frantic over reving quality"? Sounds like it wasn;t working properly, perhaps a govenor problem. ========================================= It was working fine. That's just my attempt to describe what I found objectionable about the sound quality. 3600 to my ears sounds overly busy, not yet chainsaw or weed whacker busy, but too busy. It's very subjective and may not sound the same to everyone but I will probably not buy another. |
#4
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Noise and generators
Ah, the PLEASURE of owning a Honda INVERTER genset.....
Runs 1200 RPM inside the fiberglass and steel enclosure until the load gets to around 1800 watts, then GRADUALLY increases to its full-load-speed of 2200 RPM.............all the while feeding high frequency AC to its 3KW, solid state inverter which puts out a rock-solid 60 Hz synthesized sinewave to the loads, no matter what the engine is doing..... Too bad someone doesn't use this technology in a YACHT GENSET of reasonable price.....instead of the old 60 Hz alternator-on-a-driveshaft. Larry 58 dB @ rated load 49 dB @ 1/4 load http://www.hayesequipment.com/eu3000is.htm It makes no more noise than someone talking at a normal level...... |
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