Leaderboard

We could easily find out if a narrowboat will roll under a weir boom if only we knew somebody getting a very expensive all singing all dancing - cos I can afford it - 60ft boat. Just take it onto a river and switch the engine off (electric or otherwise) and see what happens. Apparently there's very little risk so it should be easy to persuade new boat owner to participate. I'll sell the popcorn anyone want to supply the deckchairs?

The bloke is a numpty lol. Dont waste your time. The opening post should just read " Ive got loadsa money to chuck away, and I know more than anybody else about everything in the World but I will pretend to ask a question " Lol.

??? 500w at 72v may only be about 7A but so what? An MPPT is rated for its output current, not input current. 500w going into a 12v battery is going to be around 35A. Not like you to make such a fundamental error. Consider yourself to be a very naughty boy. Stand in the corner for 30 minutes.

Not being sarky here, but how can he answer that unless he ended up on the boom?

My money would be on the Clankshaft.......

What happens in the electrical cupboard, stays in the electrical cupboard

I also have the dunce hat ready if needed. After winning it so many times I got to keep it

Considering the very remote chance of me needing it - I wonder if I should not bother paying for insurance, likewise the chance of the boat bursting into flames is pretty remote so why clutter it up with fire extinguishers.

Others have said lots of sensible things on my behalf but the truth is... I have no idea. There wasn't much flow so I might have been OK. But the lack of flow would have been luck and not part of a cunning plan of mine. Who knows what would have happened if I didn't have an anchor. But I'm 100% glad I didn't have to find out.

Update: I can now add a data point as a Canalworld user who has deployed in an emergency situation (probable drive plate failure in mid river). There's always one... Location: Thames Weather: Not good, wind and yellow boards Anchor deployed: Brittany (one of the compact budget ones, although I've heard it suggested it's marginally better than the Danforth) Prior deployment experience: nil Drag: a little, but not much considering Decision to purchase: vindicated (although I'll probably still leave it in the locker on the Great Ouse in summer) Timeliness of trip boat going past and their assistance: excellent

Nothing wrong until the covers get blown off. Yes the high voltage side in on the panel side assuming the controller is working properly! I'm not taking that chance however small.

The BMV and the MPPT both show actual charge current at the time. If there is no load from the boat's systems, these values will be the same (within the bounds of measurement error). The BMV will also show actual discharge current at night. That is the easy bit! It gets more complicated when you consider the SoC indication of the BMV (forget the SoC indication of an MPPT, it is guesswork and bad guesswork at that!). Firstly we need to consider what we mean by "efficiency". There are two types of "efficiency" relating to batteries, charge efficiency and energy efficiency. Charge efficiency relates to Ah out vs Ah in. Don't be confused by the word "charge", it doesn't specifically relate to charging the battery, it means the physical thing called charge, SI unit coloumbs, integral of current. Whereas energy efficiency relates to watt-hours out vs watt-hours in. Not the same thing at all! Consider a battery whose capacity is 100Ah. How much useful energy does that represent? No idea, unless we also consider the voltage. One 100Ah cell at 3.2v doesn't have a lot of energy, whereas a 100Ah 96v battery has lots. Ah on its own is not a measure of energy, likewise current is not a measure of power. We also need to consider the voltage at which that charge or current is provided. With that in mind, the charge efficiency of a Li battery is a bit better than an LA battery but not much. I find it is about 95%, which is surprisingly low until you consider that at the fractional C usage we have on boats, the BMS perhaps takes up some significant Ah and more so when it is balancing. My Trojans (LA) seemed to be about 93%. Not a lot of difference. That is charge efficiency, and that is used in the SoC calculation within the BMV. So if you have taken out 10A over 10 hours, you will need to put back 10A for about 10.5 hours to get back to the same SoC reading on the BMV. But as I said, when you are considering anything to do with SoC and Ah, you are not looking at useful energy available because it doesn't take into account the voltage at which that charge (integral of current) is going to be supplied at. When you look at the charge and discharge voltages of Li vs LA, you start to see the real difference. LA charges at 14v or more, maybe 14.6v in its latter stages. It discharges at perhaps 12.5v or maybe down to 12v. So we have maybe getting on for 2v difference between charge and discharge voltages. So straight away, even assuming 100% charge efficiency, the energy efficiency of LA is only about 85%, and worse at high rates of charge and discharge. Whereas as you know, with Li the voltage difference between charge and discharge is much less. Modest charging is done at less than 13.6v, discharging maybe around 13.2v so only 0.3v difference giving an energy efficiency (assuming 100% charge efficiency) of perhaps 97%. Both those figures are worse in practice due to the charge efficiency being less than 100%, but even so the Li remains streets ahead of the LA. And that of course is before you consider the efficiency advantage of charging Li from a genny or engine - much less time spent running the genny/engine with very little current going in. And all that of course is why you love your lithiums more than is acceptable in decent respectable society. Can't blame you though!

In that case he may not have any

Because the BSS says you have to have them. It would be better if they insisted you had something more useful like as a minimum 5Kg water

Whilst I agree, attend on the day the surveyor is there, what I must advise is let them do their job, dont start asking questions about the boat that he/she isnt actually testing/examining at that moment. A good surveyor will talk you through what they are doing but also be able to ask you to back off with queries until the end of the survey. The worst case of putting a surveyor off their job I saw was last year, 60 plus year old buyer turned up with 2 of his expert mates(also above 60 and with 10,000 years of experience). The surveyor was pulled back and forth in and out of the boat, involved in lots of waterways chat, and merriment. At one point, they all spent 5 minutes at the front end of the boat discussing changing boat names, paint styles and how big a lozenge to add to the pointy end. Next day we came along to put the first coat of blacking on the boat. The bowthruster tube had 4mm plus pits around where the propellors spun. The tube was a 5mm thickness. I took pictures, and reported it to the broker who contacted buyer. The surveyors report didnt mention it at all, in fact, it didnt mention the bowthruster at all. The surveyor then admitted he had missed it completely and a reduction in the price agreed, plus some spot welding to tide it over until a replacement tube could be arranged.

Mass market needs cheaper cars. I think Tesla have a lot to fear from chinese manufacturers undercutting them. Like this example. Better Wh/mi than a Model 3 and at least ten grand cheaper. Same basic platform design. https://en.wikipedia.org/wiki/Shenlan_SL03 Seems an interesting car but not all that straightforward to get it to non chinese consumers to be fair.

I used our anchor on the Trent this summer. Leaving the lock at Holme and heading upriver to Nottingham, the engine coughed and died in the middle of the river, about 200 yards above the weir. There wasn't a great deal of flow on at the time but I went into a cold sweat. Tried to restart but it wouldn't fire up. I left my wife at the stern, rushed through the boat and dropped the anchor. As the boat slowly drifted downriver and the rope began to tighten, my wife yelled that she'd got the engine started. Back through the boat, gave the engine a few revs in neutral and it spluttered a bit but stayed alive. Back through the boat again and hauled the anchor back in, realising that 25kg is quite a lot to pull vertically from the water. But I did it. Back to the stern and continued on our way, very nervous and tuned in to every pulse and hiccup of the engine. We got into Nottingham and I called RCR out. The engineer couldn't find anything but agreed with me that the choppy waters on the Trent (it was very windy and we were heading into both the current and the wind) had probably stirred up some gunk in the fuel tank which caused a blockage before clearing. Looking back, I feel enormously relieved and lucky, but also pleased that I could deploy the anchor without mishap. It's not the sort of thing any/many of us practise, certainly not me. So, I reckon you should always carry an anchor on a river. On another day, if the engine hadn't restarted and especially if there was more flow on the river, we would have been on the boom above the lock in three or four minutes.

I’m assuming that the final sentence is a joke in very poor taste.

You can duck and dive as much as you want but it does not overide the fact that you said suggested you had more sea-miles that a Pilot - which is irellevant for negotiating / navigating the 'local waters'. It is knowledge of the local waters (and I'm guessing you have little experience of the Severn) that is important.

The problems with battery exchange -- as I wrote earlier, but you don't seem to have read -- are both technical and economic. The technical problems include how to load/unload and connect/disconnect large/heavy batteries -- which can be overcome, but adds cost to the vehicle (car/boat) and a *lot* of cost to the charging station, and has significant H&S problems (automated/robotic handling of hundreds of kg of batteries without crushing anyone) especially for a boat. It's not like dropping some D cells into a battery compartment... 🙂 The economic problems include the fact that for such a scheme to work all the batteries have to be the same -- more of a problem for cars, but still a downside for boats -- and the fact that there need to be charged batteries "in stock" at the charging stations. This again puts the cost up (more expensive batteries on shore needed on top of the ones being used in boats), and on top of this there's the difficulty of keeping charged ones "in stock" at places/times of high demand -- if you have to wait for one to be charged up for you when you arrive because the last charged one was just used, you might as well just plug in and charge. There's also the "who owns the batteries" problem, and how to stop people driving/sailing off with a nice new battery but coming back with an old knackered one with the same faked serial number, and many other problems... If battery swapping worked then cars would have widely adopted it, because it would remove the charging time/range anxiety worries. The fact that it hasn't been adopted** says everything... 😉 ** except in a case like Nio in China with a massive market and a system where a car manufacturers do what they're told by the CCP whether they like it or not -- will never work in the West...

What is the oil level like? Badly overfilled might cause something like that if it starts ingesting oil through the breather system. Also feel smell the oil for diesel in case the lift pump or injector pump was incorrectly assembled.

Yesterday 2022 Halifax Branch C&H lock bridge towards Halifax River bridge sign Salterhebble Basin looking towards the Dock

Yeah it's impressive stuff. Thinking about it, I haven't spotted any leaks this year, I wonder whether it's cured itself.... (The windows and slight lack of headroom are the only bad bits with my current boat, a Highbridge 32, one day I'll buy a scruffier one and chop the topsides off, extend them up and fit proper windows to it, be better than any lumbering metal thing)

"Suspected Weils disease" is when you think it's Weils disease but the tests keep coming back negative, no matter how many tests you do and how much you want it to be Weils disease. I thought it poorly written too, but may not be such a poorly written story if one approaches it expecting an article about sewage rather than about Weils.

With the repeal of compulsory state education, we'll have more poor children to both send up the chimneys and mine the coal. No need for immigrants at all. Keeping the lower orders uneducated makes them so much easier to control when there aren't any lefty teachers filling their little heads with nonsense like Marxism and quadratic equations. A risk though of child labour shortages leading to wage rises, reducing pit owners profits and causing a cost of living crisis for upper class families with chimneys to be swept, but at least there won't be any bolshie unions disturbing their natural subserviance to their betters. Non existent global warming will finally fulfill the promise of Brexit by making the uplands sunlit. When they aren't on fire of course. For those of us who own upland grouse moors, sea level rise will make our uplands a bit less upland and bring in a bonanza of hovel building and slum rental income, rehousing the displaced. Instead of shooting grouse, we can hunt migrants for sport. Seems turning a bit Tory is as catching as covid.

I didn't use offensive language in the post. The video contained offensive language. Obviously Bernard is a bit old school and not everyone likes it. Sorry if it offended any (word removed)s who might be viewing !

https://www.boatsandoutboards.co.uk/boat/1932-canal-boat-yarwoods-8605824/ For sale now.

Not quite as pointless as just moaning about it on an internet forum......