T-Pain Is On A Boat: Re: [Electric Boats] Hi, myles , maybe a bit more on cooling for outboard and noise question?

Saturday, June 7, 2014

Re: [Electric Boats] Hi, myles , maybe a bit more on cooling for outboard and noise question?

Like I said, this has been my experience. The current reversal principle I have crudely described is the same for any appliance. Whether it is a fluorescent light ballast, or a motor. In my case, I broke down and bought a Trace brand, True Sine wave Inverter and stopped all the buzzing, humming, and other noises, that all my electrical appliances were making on my farm. Pump and fan motors, lights, and anything with a moving part or transformer went instantly quiet, and started lasting much longer.

Could be different, doubt it, enjoy your quest for total quiet. It is a good one.

Cheers,

Dan

----- Original Message -----

From: matwete matwete@comcast.net [electricboats]

To: electricboats@yahoogroups.com

Sent: Saturday, June 07, 2014 1:31 AM

Subject: Re: [Electric Boats] Hi, myles , maybe a bit more on cooling for outboard and noise question?

I wouldn't say you're all wet unless you are suggesting this applies to my brush motor and controller.

Sent from my Verizon Wireless 4G LTE smartphone

-------- Original message --------

From: "'Dan Hennis' dhennis@centurytel.net [electricboats]"

Date:06/06/2014 3:11 PM (GMT-08:00)

To: electricboats@yahoogroups.com

Subject: Re: [Electric Boats] Hi, myles , maybe a bit more on cooling for outboard and noise question?

I Could be all wet here, (pun intended), but it has been my experience, (and not knowing all the facts), that the motor noise you are hearing is most probably from a (how can I put this delicately??) cheaper square-wave or "modified-sine wave" converter. These converter/ controllers are notorious for motor noise. When a true sine wave inverter/controller is used, the switch from plus(+) to minus (-) in each wave is "softened" in a momentary laps of time. Also, the power is brought to a zero level briefly, before switching to the opposite side of the phase. Then, the power is brought in slower and then accelerated to peak before slowing to repeat the same thing again. This power fluctuation is measured in nano-seconds and helps the coils and such, change polarity without the jolt of instantaneous reversal. I have witnessed the effects of this instant reversal on my own home computer power supply, and a set of 10:1 bump/boost transformers I had on a home wind-power rectifier. In the case of the computer supply, it popped and melted itself down in about 20 minutes. In the case of the bump/boost transformers, it took about a week of full power use.

I know there are added circuits in these cheaper inverter/controllers to try to minimize the effects of the jolt. However, like all electronic circuitry made today, they are made on an assembly line with little or no balancing of internals. And if memory serves, the use of 5% or even higher mismatched components is the standard. It is very possible the unit in question may simply need a very good electronics tech, to put it on the bench and match it. Or, whine and cry very hard to the manufacturer, to replace it, and be mostly done with it. However the problem will still be there and until you can get a better unit, you will always have the noise.

I think if it were me, I would put a small mic next to the motor, and wire it to a small homebuilt sound synthesizer box and re-modulate and re-broadcast it into something that sounds like a Corvette 350! Then watch the neighbors cringe! And, you might impress your fellow boaters with your throaty "engine noise". Or, you could make it sound like a jet turbine, or, ... a 2-stroke, spit-box, outboard.

Just a suggestion ...

Hope this helps, but I agree with John...

Dan

----- Original Message -----

From: 'John Kohnen' jhkohnen@boat-links.com [electricboats]

To: electricboats@yahoogroups.com

Sent: Friday, June 06, 2014 3:04 PM

Subject: Re: [Electric Boats] Hi, myles , maybe a bit more on cooling for outboard and noise question?

Cal's first outboard conversion is noisy. The whine can be heard from
quite a ways away. :o( I doubt that it's anything to do with the Golden
motor itself. Might be damaged bearings and/or gears in the lower unit, or
misalignment somewhere. It'll be interesting to compare the noise when the
conversion of the little motor is completed.

On Thu, 05 Jun 2014 07:09:05 -0700, Myles T wrote:

> Cal, et. al.-
>
>
> Truthfully I'm having a tough time suppressing a laugh. Why? Whether
> I'm fishing, motoring at the dock, creeping thru a marina or cruising,
> I've only ever had folks comment about how quiet the boat is. Heck,
> I've snuck up on other fishermen with a clear WTF wonder on their face…
> ...

--
John (jkohnen@boat-links.com)
I must say I find television very educational. The minute somebody turns
it on, I go to the library and read a good book.

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