CarpeDiem
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Posts posted by CarpeDiem
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42 minutes ago, Saltynuts said:
Without getting into the politics of the global warming nonsense, it doesn't stack up environmetally either.
https://www.yachtingmonthly.com/news/electric-propulsion-not-most-green-study-finds-95997
That's a great article. Thanks for sharing.
I feel like I missed an opportunity to go electric 5 yrs ago... Now reading that maybe I didn't.. Haha
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18 minutes ago, waikiore said:
Then of course what happens to the large battery bank when it is had it.
LTO cells have 30000 cycles.
LFP cells have conservatively 3000 cycles. Most now have 7000 cycles.
Assume you are in a marina, you charge your batteries every week and you motor your full battery capacity (call it a conservative 15Nm) every weekend on a 3000 cycle battery bank...
That's 57 years of weekend usage. They are going to outlast the boat.
You run the generator occasionally cause you picked a light wind weather window and you are on a tight schedule.
After 4.5 years I have put 225hrs on the engine. The most use it gets is making a deadline cause theirs no wind. Which is typically the delivery home from coastal or bay week.
I have room for a smaller lighter engine, fuel and 24kwh of batteries. Which apparently would give me 20Nm at 4knots.
The numbers stack up for me.
Ymmv
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18 hours ago, Saltynuts said:
I really can't understand why anyone would fit electric propulsion. The extra expense, range issues and they are worse for the environment than an ice engine.
An hydro generating electric motor with appropriate battery storage and a optimally engineered ice engine is an order of magnitude better for the environment.
Running an ice engine at optimal torque with all the energy that can be being pumped into the batteries and nothing being wasted is why hybrid cars are so efficient.
On a hybrid boat you get the double whammy option of being able to have extended range by having a propellor drive as well that can be also spun by the batteries or the diesel.
When you are sailing you are also charging the batteries. And if the batteries go flat you can engage the engine.
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16 hours ago, Bad Kitty said:
I tried really hard to make it work for me, but ended up going 2 x 40hp diesel again, and don't regret it for a minute. The all-electric solution is, imho, not mature enough or well proven enough. There are numerous boats that have gone that way, and then ripped it all out & refitted ICE drivetrains.
Ultimately, every now & then you may need to motor for 48 hours, and nothing all electric will do it. Not in small craft size.
But you have a generator for when you need it. A purpose spec'd marine generator with a matched alternator is many times more efficient than a diesel sail drive engine. Our engines waste so much energy.
I agree you can't get away from having a generator when you also have tight schedules and can't afford to Bob around for 48hrs waiting for favorable winds.
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1 hour ago, Jon said:
Rapido 40 #07 has arrived in New Zealand!!
It's all electric with Oceanvolt and is the first Rapido 40 to have a helm wheel.
This is the second Rapido to be based in New Zealand. Rapido 60 #02, Romanza, is in Auckland.
#allectric, #helmwheel, #rapido40, #oceanvolt
from bookface
I love the OceanVolt range. I really regret repowering to another diesel. A definite case of not knowing what I know now. 3 years ago I just thought I knew that diesel was the only option and there was no way electric could ever be an option... boy have I learned a lot.
Where is Romanza now? Was on the poles at Westhaven but I have not seen her for a long time...
A beautiful boat.
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1 hour ago, khayyam said:
My understanding is that the threshold is quite low, too.
This year it is $140k (ish) - so the most you get is 80% of that, which you will pay tax on - anything above that you need income protection insurance for.
I will not judge if that is "low" or "high"
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3 hours ago, K4309 said:
I'm not sure how ACC covers loss of income for small businesses / tradies, my understanding is it is in-effective. Business insurance is generally required.
It doesn't at all. It covers 80% of your personal income up to a threshold. After that you need income protection insurance.
A lot of self employed eg tradies, come unstuck with income under the table or using valid options to reduce there income, eg fringe benefits...
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1 hour ago, aardvarkash10 said:
Wording from a Vero boating policy, exclusions:
"damage deliberately caused by the wrongful or reckless acts or wilful misconduct of any insured person;"
If I were an inusurer, I would claim that navigating among other craft at several times the speed limit while not at the wheel or in control of hte boat qualifies as wilful misconduct.
They may get hung on the "deliberately" bit and a lack of oxford commas.
There's nothing to suggest this was a "deliberate" act. That's would be a very high bar to pass.
He plead guilt to dangerously operating a vessel. That's a far cry from deliberating ramming your vessel into another.
He didn't purposefully set out to ram the ferry. It was not a deliberate act
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2 hours ago, ex Elly said:
He was remanded at large and will be sentenced in June. The charges are laid under the collision prevention rules of the Maritime Transport Act 1994 and carry a maximum penalty of 12 months’ jail or a $10,000 fine.
He hasn't been fined yet. He could get jail time.
It will be a steep hurdle to cross to get jail time - I would suggest he won't even see the full $10k of the fine.
If there is no precedence then it will be in the 2k - 5k range. If there's precedence then it will depend on what those fines were and what they were for.
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3 hours ago, Terry B said:
Hi Aard, agree he's up for heaps however that's not what the law should take into account.
Unbelievable that a man loses his boat and suffers severe health consequences and this guy who caused it gets a $10,000 fine.
Recompense for the ferry guy? Apart from insurance on the ferry? What about his costs for on going health issues, loss of income, etc, etc?
New Zealand has ACC.
While ACC is often unfair to the victim and victims often end up worse off, that's just the way it is.
Our ACC is considered world leading and is envied by the developed world.
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On 22/02/2024 at 5:34 PM, Black Panther said:
So time goes faster for them.
The GPS satellites are also impacted by special relativity which says the faster you go the slower time passes. But they aren't going fast enough to cancel out the effects of gravity... So overall time goes faster (relative to us mortals).
On 22/02/2024 at 5:34 PM, Black Panther said:The GPS satellites are further from the earth than the space station. Far enough that they experience a different space/time than earth.
The iss is also affected by less gravity, but is going so fast that special relativity cancels out the gain from less gravity and overall time goes slower. (Again relative to us mortals.)
I don't have a clue why, like I know the earth is flat, it just is
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19 minutes ago, Frank said:
Talk to Kerry at the Marina shop (Insurance broker)
kerry@themarinashop.com
Thks. Will pass it on.
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A friend who is purchasing a relatively new 50ft production Cat has been told by his insurance broker that he'll be very unlikely to be able to get insurance for off shore if the vessel is NZ flagged.
Have another friend with a 54ft Halberg Rassy who goes to the Pacific Islands every NZ winter. They registered out of Cook Islands because no one would insure them if it was NZ flagged.
Seems that the reasons for a foreign flag aren't just to avoid Cat 1.
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13 minutes ago, ynot said:
I've had two go from new motor in three years.
I think dry start ups are the culprit ...for whatever reason you have a dry start...barring the maybe faulty one.
I have noticed that after a longish period sailing at a reasonable pace...eg quick for a few hours or a dozen or more hours when I start up the donka donka it takes a while to pump...no alarm fitted but my ears tell me!..that hollow exhaust sound of oh f*ck.
I have taken to shutting off seacock when I know we are going for a Hoon for hours for example ssanz or whatever.
Initially I had a loop with a anti syphon at the the top...bad move because IMO when the pump sucks it also sucks air thought it...negative pressure! and when motor is stopped air enters through the anti syphon and the water from that high point through venturi effect gets sucked out.
My anti syphon was quite high above the top of heat exchanger.
Am i making sense or jibberish
Perfect sense. We get the empty effect after being thrown around in swells. Doesn't happen often and only ever after rough conditions. It's very noticeable with the alarm, the alarm cuts off after about 2-3 seconds.
My theory is that the saildrive is coming out of the water allowing the water to drain out and air to get in.
The anti-siphon on the d1 should be after the impellor! Between the impellor and the HX.
On the larger D2's it should be after the HX. Between the HX and the exhaust mixer.
It certainly should not be before the impellor so no chance for the impellor to suck on it.
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Do these generally just fail on start up? Or are they just as likely to fail during motoring?
I installed a water flow alarm - so if it fails I will know instantly - but knowing instantly while in an inconvenient spot may not help...
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1 hour ago, K4309 said:
Serious question - I've been told I need an LPG alarm at the lowest point in the bilge. How then do you keep it in good working order, given the risk of water in the bilge?
I got told to put it above the lowest point at a point where I felt it would not get wet. Gas fitter was quite clear that I knew the boat and that I could make the call. We have a nice teak grate at the bottom of the steps adjacent to the stove.
When racing pulling in a scalloped kite, or in severe rain it can end up with with a few inches of water in it that slops around. Coming downstairs with soaking wet weather gear its a great place to strip off...
It's always a compromise and is another item that has to be maintained, checked and loved.
All up we have 14 independent disconnected "bilges" under the floor boards - it's impractical to put a sensor in each...
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2 hours ago, K4309 said:
If it complies with the relevant NZ standard, what have Worksafe got to do with it?
Because Worksafe controls the secondary legislation which specifies what gas bottles can be imported to, or manufactured in, NZ.
It used to be all under MBIE but when Worksafe split this went with them.
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LPG installed to current NZ Standards?
Kind of a conundrum isn't it?
How can you be compliant with a standard which according to that standard, doesn't apply, if your installation predates said standard?
Personally I think that saying I am compliant, without making it clear that the standard does not apply to me would be misleading my insurer and imho goes against the well established doctrine of utmost good faith... and I might find my insurance revoked in the event of a claim.
ymmv
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1 minute ago, khayyam said:
The end of bottled gas is a (very) long way off.
It's never.
The current proposal is that bottled LPG will be replaced by bottled bioLPG by or before 2050 there is no end to bottled gas proposed. NZ industry/govt needs to get its sh*t together and build a manufacturing plant. There was one proposed for 2020 but it's still on hold.
Connections to the natural gas network (not lpg) are a different kettle of fish. But nothing is currently confirmed and no date has been set and it might not even happen.
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2 hours ago, Guest said:
With induction cook top I guess you could run the motor when in use to alleviate loss to battery. Still need 75m^2 to inverter tho. 2Kw for 15min is 40ish Ah, correct? Not allowing for invertor losses, and @12.8V
When is the target extinction date for LPG?
There's not really a date... Reality is the date will come and go and the only thing that might change is the price of gas...
LPG will be replaced with bioLPG which is chemically identical to LPG, but can approach net zero emissions. You could replace your 9kg cylinder with bioLPG today and there'd be no difference, your appliances would operate exactly the same.
The Government pipe dream of a 2050 net zero New Zealand signals that the transition will happen in the next 25 years
Yes, approximately 40Ah at 12v.
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4 hours ago, LBD said:
I have been having a look at those... would love to know of any around NZ and how well thy are liked.... or diisliked.
I am also trying to see if they can be gimbled and if not, what is the maximum pitch and heel angles.
Apparently they can be gimbaled. But I am at a loss to understand how you'd gimbal it with the exhaust requirements...
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37 minutes ago, Ladyhawk said:
That cooker was noisy as hell too, weird cyclic buzzing sound that got on our nerves lol
Magnetostriction. The amount of this is more about the cookware than the cooker. But it's pretty hard to eliminate altogether...
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40 minutes ago, Lindsay said:
Does anyone here have experience with a diesel stove?
I looked at them but found the exhaust flu/chimney requirements just wouldn't work for our boat layout.
https://wallas.fi/product/87-d/
A new Rapido 40
in MarineTalk
Posted
That's exactly what you do.
The HH44 has a 10kW engine which is just a stock standard 3 cylinder kuboto red mechanical diesel that we all know. It has a 10 kW generator attached to the output shaft and also has the typical shaft drive propellor that most boats have.
So the 10kW engine can be delivering 6kW to the drive shaft propelling the boat while driving the generator at 4kW charging your battery bank.
When you stop the engine the battery powers the generator spinning the drive shaft.
When you put the sails up the propellor spins the generator charging the batteries.
This is even more efficient than hybrid cars which convert mechanical to electrical and back to mechanical. And hybrid cars have been charging batteries while you drive since forever.