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nb Innisfree

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Posts posted by nb Innisfree

  1. Carbon Monoxide Scare

    in New to Boating?

    Posted

    11 hours ago, Momac said:

    While BSS can't really justify the requirement for CO alarms it is certain  people have died from CO poisoning on boats with the source being their own boat. An example being the 'Love for Lydia' fatalities which involved a petrol engined GRP boat with the source of the CO being the boats own engine. The exhaust fumes were presumably blown back into the boat by the wind.  So this would demonstrate that CO can remain in sufficient concentration to be harmful in an outdoor space albeit over a very short distance of a few feet.

    There was another case in York which was CO from a faulty cabin heater on the boat and not from an adjacent boat.

     

    image.png.b902b709a2f8504ce11930ad1b2cecfa.png

    Our alarm registered a low level of CO, turned out to be smoke from stove chimney blown by the wind & curling down into a mushroom vent, only when wind was in a specific direction & speed + vent was a specific distance from chimney, took me ages watching over a few weeks to pin it down, cured by a fitting a long chimney. 

  3. Water weeping from skin fitting

    in Boat Building & Maintenance

    Posted · Edited by nb Innisfree

    25 minutes ago, MtB said:

     

    In a new house installation that's an instant water regs fail! 

     

    Cross contamination with heat is not only not nice for cold drinks but presents a legionella contamination risk. 

    I've been struggling with a similar prob in our house b/room basin, mains and cyl dhw (from a shower pump) sharing t/static mixer tap & non return valve back leaking. Decided to run pumped cold supply to tap &  mains to dedicated cold tap. 

    Mains & low pressure tank/cyl just don't like each other despite NRVs. 

  5. Shore Power use

    in New to Boating?

    Posted

    2 hours ago, NB Thistle said:

    In the fire service we were taught 1l of liquid water expands to 1800l of water vapour. That's how water puts out a fire best, you put just enough on to fully vaporise (removes more heat than just cooling) and displace the oxygen from around the combustion. The Swedes did a study and found you can extinguish an average sized living room completely involved in fire with 13l of water - correctly applied. Most people though just drown a fire!

    We were just starting on that method when I retired from FS and iin '02, but faced with a real goer & nowhere to shelter from intense heat while using that method I still preferred to blat it back with high pressure fog from a hose reel!

    Old fashioned has been prob 😂

  6. inverters

    in New to Boating?

    Posted

    When I fitted out Innisfree in 2005 I fitted a 3kva 24v Victron, recommendation from Victron was 4/6 x 110ah batts, eventually ended up with 8 x 120 AGMs, boat had all mod cons, full size auto w/m etc, worked flawlessly.

    Nowadays with LFP it would be even better.

    • Greenie 1

  7. Changing to lithium.

    in Boat Building & Maintenance

    Posted

    1 hour ago, Tony Brooks said:

     

    I would love to see you store that lot in the gas locker on our boat, mind you, mine had a proper gas locker, not some oversized "waste" space in the bow, so not everyone does, just some people.

    I used to keep genny petrol in a gas locker, but it was a spare locker specced by me at hull build, beginners naive concern about bottled gas supplies on the cut, glad I did though. 

  8. Shore Power use

    in New to Boating?

    Posted · Edited by nb Innisfree

    Lots of assumptions are made, I recall a boater trying to figure out his electrical probs, he had removed his batt banks & stated that he could deffo eliminate those on the basis that they were good batts & were fully charged (after all he'd run his engine at least 2 hrs 🙄) When I put a multimeter on them it recorded 11.5v, he refused to admit they were nearly discharged even suggesting my meter was faulty! I politely made my excuses & left. 

     

    You can lead a horse to the water etc... 

    • Haha 1

  11. Whispergen

    in Others

    Posted · Edited by nb Innisfree

    3 hours ago, MtB said:

     

    Must have been something wrong with it then.

     

    Mine ran so quietly that people walking past the boat didn't realise is was running. 

     

     

    It was quiet, but "silent"? 

    İ found it noisier than expected

     

    Quote:

     

    "The noise level of the origin WhisperGen, a micro-combined heat and power (MCHP) generator driven by a Stirling engine, was rated at 44 dBA at 7 meters. 
    For context:
    • A range of 50-60 dBA at a specified distance is generally considered "quiet" for a generator.
    • The original design was intended to be "unobtrusive" due to its continuous external combustion process, which avoids the noise and vibrations of an internal combustion engine.
    • Despite this, in domestic applications, the noise was a subjective issue for some users, leading to recommendations for installation in utility rooms or with acoustic enclosures"

     

  12. Whispergen

    in Others

    Posted

    Only time I saw a Whispergen in the flesh & running was on a trade stand at Crick boat show, advertised as "silent running" it was anything but. 

     

    Bloke once tried to to flog me a petrol genny that was "super silent sor" 😊

  13. Whispergen

    in Others

    Posted · Edited by nb Innisfree

    Whispergen:

    Inefficient electric genny but good heat genny. 

     

    Quote:
    "Sounds brilliant until you look at what it actually produces - a measly 750W of DC power (ie about the same as a 50amp alternator!) But it also produces a hell of a lot of heat - 6000W!! - which presumably has to be got rid of somehow unless you need it for heating the boat"

  17. PROPELLER SIZES

    in Boat Building & Maintenance

    Posted

    Re prop makers: We had various  size calcs from a few suppliers & reading various sources decided on Crowthers, the bloke there (can't recall his name) didn't do any calcs, based on boat length & draught + engine & prop dia he guessed pitch & blade area, & guess what? He was spot on! A real beauty, which made all the others wrong 🤔

    • Greenie 1

  24. Was it like this in 1976?

    in General Boating

    Posted

    5 minutes ago, Ronaldo47 said:

    My understanding, from university-level geology text books rather than the Internet,  is that changes that can persist for a few centuries, can happen over significantly shorter time scales than "thousands of years". 

     

    When the Ronans invaded britain around two thousand years ago, it was warm enough to support grape vine cultivation, and evidence from pollen grains in dateable sediments in lake beds, indicates the then presence of plants that would only thrive in a warmer climate than today's. 

     

    In the Viking era of about a thousand years ago, the northern hemisphere was still a few degrees warmer than today. Greenland was sufficiently green with vegetation to be able to support Viking agricultural communities for several centuries until climate change made it too cool for agriculture to be viable. 

     

    This was followed by the 'little ice age' of the 16th to early 19th centuries, where the climate of Northern Europe was a few degrees colder than today, when rivers like the Thames would regularly freeze over in winter.

     

    I am not sure what reference datum is used as the "pre-industrial age" that is often referred to when defining the global  rise in temperature (which can only be estimated, as accurate thermometers have only existed for a couple of centuries), but would not be surprised if it was at the tail end of the 'little ice age'. A different picture would no doubt result if the Viking era temperature were used as the pre-industrial era base line.

     

    I am not denying that man-made emissions, and possibly just as significant, man's destruction of forests that capture carbon,  have an effect, but would be surprised if it were the only cause.

     

    These things can only ever be a matter of opinion, as we are never going to know the real cause, or causes,  for certain, as we cannot suddenly stop producing man-made emissions to see if things improve.

    And yet we are still in the last/present ice age! 

    We can only  guess, as always, what the future holds for us. 

  25. Was it like this in 1976?

    in General Boating

    Posted

    I remember responding to a TV D radio plea for all off duty firefighters to report for duty, I finished up as a crew of 4 standing by to protect a large conurbation.

    A part time leading fireman was in charge of us & like Capt Mainwaring he was catapulted from obscurity to a position of power & importance (or so he thought!) sat expansively behind the Station Offices desk 🤣🤣🤣

     

    Happy days. 

    • Greenie 1
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