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Old 23-02-2018, 10:24   #31
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Re: 25 ft wooden boat reconstruction

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Any tests can be done when boat launched after winter. At my region we launch usually at late April - early May.

I plan to install gas gen
Well if your usual motoring pattern draw the batt down in 2-3 hours, that will leave little safety margin for unanticipated situations where you may need full power for maybe a full hour.

Unless the genset is powerful enough to run the propulsion motor at full power when the bank is depleted, that would tgen be OK IMO.
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Old 23-02-2018, 10:41   #32
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Re: 25 ft wooden boat reconstruction

Thanks for your reply.

I can motor at full power ~3 hrs at batteries only.
7-8 hrs at batteries only at calm weather, 3-4 knots.

Selected gas gen is not able to provide sufficient power to motor at full power (it can provide sufficient power to motor at half throttle only). Such a decision is dictated by the fact that I do not want to install a heavy generator and do not expect a situation in which it takes a long time to motor at full power.
In case I need long full power motoring, half power provided by gen, rest provided by batteries. In case of full charged batteries it is 7-8 hrs of motoring at full power. After that I have to reduce power by half and use only gen, because batteries discharged to this time.

Is this a good idea - next navigation will tell.
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Old 23-02-2018, 11:55   #33
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Re: 25 ft wooden boat reconstruction

Great my concern was safety, windward side of a hazard, tides shift. . .

Obviously depends where / how far you go.

So when at risk, keep batts topped up to a higher level than you would need to otherwise.
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Old 23-02-2018, 13:24   #34
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Re: 25 ft wooden boat reconstruction

I understood.
I will make a changes according to experience I get during navigation. I want to make the reliable hybrid drive at the end.
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Old 24-02-2018, 07:00   #35
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Re: 25 ft wooden boat reconstruction

If your custom-built batts will be difficult to reproduce to add more in your voyaging, maybe increase capacity sooner rather than later.

Not a great idea in general to add old to new. Nor to have multiple smaller banks.

But if you think you're OK for 3-5 years, carry on, can just get a bigger replacement bank when the time comes.
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Old 24-02-2018, 18:30   #36
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Re: 25 ft wooden boat reconstruction

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Thanks, 50% turpentine and 50% linseed oil







Next time I will build from scratch.


If you add 10percent teribin it will dry and create a better seal.
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Old 25-02-2018, 01:51   #37
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Re: 25 ft wooden boat reconstruction

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If you add 10percent teribin it will dry and create a better seal.
Sorry, what is teribin? I tried to google it, but nothing found.
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