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About tjg1677

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    live grimsby, moor in horning
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    Boats, live music cooking
  1. Independence - Updates | Maintenance & Care

    Re the crane. Normally on ships the swl is calculated by what the crane can physically mechanically lift - less about 25 percent. Ergo 315 kgs even on a swl rating of 300 kgs in reality will not be an issue. Cheers Trev
  2. Independence - Updates | Maintenance & Care

    Greeting Robin, Griff and team Indy, Just caught up with this as been off site for a while. First of all good luck with the work weekend and Bon Voyage for your trip in Feb. Just had to put my tuppence worth in here regarding fuel and tanks. It is bad marine practice to take a vessel to sea with all tanks cross connected and open to each other. Strongly recommend that you use just one tank to feed everything i.e. center and top up off the others. I speak from bitter experience here, on a small coaster that I had just taken over on as chief engineer, the previous chief had left 2 bunker tanks cross connected and feeding the daily service tank via a transfer pump. We hit bad weather and water got into one of the bunker tanks. Sadly it was one of the cross connected ones so we ended up with 2 out of three bunker tanks contaminated as well as the daily service tank and the main engine and generator. Nett result = total power failure in a force 9 in the north sea, not an experience I care to repeat. Once I had figured out what had happened it took me 2 hours to restore power and a further 3 to restore propulsion. Needless to say it didnt do the fuel injection pumps and injectors much good either. Just a cautionary tale... hope all goes well and you all reach norfolk safely. cheers trev
  3. Hello All

    A good starting point is go for the biggest boat you can afford to purchase, moor, licence, like and most importantly handle. If you stick to that maxim you should end up with one that suits your needs. If you get one too small for you then it is a problem, on a boat you can never have too much space. Not the be all and end all by any means but it is a good starting point. I made the mistake when I bought my first boat of going for one that turned out to be too small. Hth Cheers Trev.
  4. Hms Queen Elizabeth

    Didnt know it was april.....
  5. Independence - Updates | Maintenance & Care

    Doug has just hit the proverbial nail on the head here. Standard marine practice be it ships or boats is to have what is called a daily service tank. In the case of your boat this would be the centre tank which would feed everything and all returns lead back to it. The port and stbd tanks would then effectively become bunker tanks that you fill the daily service tank from as required , alternating between port and stbd on every tramsfer. This would of course require a fuel transfer pump but the conversion would be relatively simple. It is also common practice to fit a filtration system into the transfer lines discharging to the DST. On big ships this is done using something called an alfa laval centrifugal separator. Obviously not practical on a boat but a polishing system could be fitted in lieu. this method allows minimal cross contamination and the ability to control the trim. The last ship i was chief on had 7 bunker tanks and the DST had a capacity of 4500 litres which would keep the main engine going at full power for about 30 hours. Just an insight into how it is done at sea on both military and merchant ships and boats and may be a possible method to consider. Cheers Trev
  6. Hms Queen Elizabeth

    Indeed they are. Oil bath system with a rotating mechanical type seal at both ends, not a stuffing box. If water is leaking in, it would have to be structual failure such as a weld or flange on the inboard end of the stern tube assembly.
  7. Hms Queen Elizabeth

    or the manpower to crew it.........
  8. Fridge Advice

    A domestic fridge will work perfectly well off an inverter providing you have the right battery capacity. On my narrowboat I fitted a domestic fridge powered via a 2kw inverter ( needs to be min 1.5 - 2kw for the start up load ) from 3 x 110 ah batteries, it worked fine. My alternator was a 55amp one that put plenty of power back into the batteries. Ok on GK the fridge is a 24v isotherm one ( yes 24v, a barnes brinkcraft innovation ) and it also works fine. However last summer I fitted a domestic freezer and that is driven off my inverter, from my 12v system, with no problems but I do have a 100w solar panel feeding the domestic 12v batteries. It all works very well. Completely agree with Marshman about the boat thing and it is very annoying indeed when there are other ways and means. Try this link, they are magnum motorhomes here in grimsby and are generally quite competetive : http://www.magnummotorhomes.co.uk its all about personal choice and what ameneties your boat is capable of providing. cheers trev
  9. Dee And Mike

    Doesnt sound terribly well presented for a boat that is up for sale. Everything should work and generally speaking the bilges be clean and dry on a vessel that is hoping to be sold. Unless there is a very good reason for all of this i would be inclined to walk away. Sounds like it could have been laid up and uncared for for a while. Trev
  10. In the mid seventies, in between aston boats, we hired a very strange looking boat from sandersons, I think it was called sandpiper and if I remember correctly it was a 30 foot woodie. Very odd design, what struck me was the way the cabin front swooped down to the deck and the aft cabin seemed to have a distinct upsweep to it. Unusual design but quite striking and always drew attention. I also seem to recall that there was a smaller 2 berth version too but can't remember what it was called. Cracking boat though and didnt half shift over breydon. Trev
  11. Independence - Updates | Maintenance & Care

    In other news - I have secured a lovely mooring on the Broads, not where I originally planned but I will now be in Brundall. Side on, 60ftlong with my own bit of lawn by the boat, perfect. looks like we are going to be neighbours robin, we are moving to a new mooring in the spring , linear with our own lawn and bbq area....bliss
  12. Can You Solve This?

    I did say roughly and what i should have perhaps explained is that the draft used is the mean average depth from the waterline to the turn of the bilge / bottom, ignoring the keel........
  13. Can You Solve This?

    you can actually roughly calculate the weight of your boat using this method. very roughly multiply length by beam by draft and deduct between 15-20 percent for the taper of the bow. whatever this comes to as cubic metres will be roughly the weight of your boat. i.e. GK is 12.6 x 3.6 x 0.33 = less 15 percent = 12.43 or at 20 percent = 11.44. she actually weighs in at just a shade over 12 tonnes so I am told. Archimedes principle at its simplest. Used to do this all the time in marine engineering when adding steelwork to a ship to enable recalculation of draft and stability curves. all interesting stuff... when I replated the bottom of my narrowboat I put an extra 3 tonnes of steel in it, using the above method, I calculated the extra draft. when she was relaunched I was only 6mm out. cheers trev
  14. Ex Alpha Boats To Enter Bb Fleet?

    Thanks for that Vaughan, really interesting stuff that I didnt know. Will have to check for the twist next time I am on her........
  15. Ex Alpha Boats To Enter Bb Fleet?

    You are so right about design quirks Robin. On GK there are some novel features but that said there are also some dreadful ones too, notably the grab rails and lifebuoy holder which both have an irritating propensity to trap and hold water and turn everything green, so annoying. The airdraft on GK is 6 foot six inches, no screen but that is to the top of the forward nav light which is the highest fixed point. Often get under wroxham but never managed potter yet!! Vaughan, is that correct that the old fb wilds moulds were used for the hulls, I wasnt aware of that. Does that include the 42 footers too? Reason i ask is because gk has , well a sort of weird hull design or seemingly so. It is very squat looking with an extremely blunt bow. I know mine is a little unusual in that the bottom is copper impregnated in the layup, i understand that only happened for two years between 90 and 91. Cheers Trev

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