A weight problem solution for my Corniche

[Nick2]

It is becoming apparent to me that my beloved Corniche still despite the empty holding tank sits too low at the stern. As well as the large metal holding tank there is a fitted Mastervolt diesel generator which is only a couple of years old and a suberb but heavy piece of kit that we have only used once.

The plan is to remove the two items and store for refitting either back in this boat or more likely our next boat whenever that may be.

What does the panel think ??

Nick

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[boatone]

Why are you worried about the 'apparent rear end squat' ?

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[Nick2]

Cos she really is too low at that end and sits rather too bows up on the plane. Just seems that i am lugging weight around thats in the wrong place (sounds a bit like me) at the detriment of performance and economy as well as just not looking right.

Nick

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[mainshiptom]

I would try and move things forward, anything that is stowed away ??

I would not be without my genarator, just has you will get rid off , you might just think I could have done with that now ?

We are off to Holland in August, You can stay in lakes (Meers) free of charge and anchor off little islands, Once our battries are low all you have to do is flick a switch and make a bit of noise, The alternative is to switch main engines on ?
The geni also heats up the water quick for a shower !

Tom

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[MedDreamer]

How is it that despite our boats being our pride and joy ("beloved") we are always planning for "the next one"?

It must be a easy life being a yacht broker.



<hr width=100% size=1>Martyn

 

[burgundyben]

"at the detriment of performance and economy as well as just not looking right"

sounds a bit like you also!!

<hr width=100% size=1>Wanted - Austin Healey 110/6 or 3000 to rebuild, LHD considered.

 

[Nick2]

I accept your point and there will be times when i curse my decision but with two small kids we are unlikely to stray too far from civilisation. We have moved as much foreward as poss but the genny really is too big and good for this boat. Of course this may be my excuse to get a bigger boat that will take it.....

So far we have only used genny once to power a laptop whilst under way which i guess an inverter would have done.

Nick

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[DepSol]

See my pm but basically

1 sell the genny
2 buy a smaller portable genny
3 buy new nav equipment
4 buy a liferaft
5 reduce size of holding tank
6 add pump out facility to smaller holding tank
7 fit new small genny between front cabin and anchor locker as long as it is the silent type.


<hr width=100% size=1>Dom

Now where is that Brendan hiding?

 

[sailbadthesinner]

OOOOOOOOOh
must be breezy in that glass house of yours
what with you chuckin all them stones around.

<hr width=100% size=1><font color=red>By 'eck the sun is out</font color=red>

 

[Nick2]

Where would I advertise it if I were to sell the genny ?

Nick

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[mainshiptom]

What is the weight of the genny ?

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[jfm]

Question whether the problem is real

I'd want to keep the genny.

How about - keep genny, dump all gas bottles to save weight. Get a lekky hob (much cheaper from Comet etc that the cost of taking out your genny). This is much safer than having gas on board.

How much does your genny weigh?

Are you really sure your boat really is driving nose up too much? Here's a pic of our boat (fairline 42), taken by BarryD. It's a bit of a rubbish shot, but the point is that boat is very nose up and stern down, and all totally normal imho. Are you really sure your boat is worse than this? Do you have pics to prove it to yourself? I wouldn't dump a nice genny unless really sure it is a prob. All imho...

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[Nick2]

Re: Question whether the problem is real

Not sure what the genny weighs - its a mastervolt 4ka I think all in plastic casing. We just never really use it and i guess if I keep it and store it I can always stick it back in again or another boat. As far as bows up is concerned most folk reckon that she rides a bit higher than the normally bows up Corniches tend to ride.

Think I want to try without the weight and maybe get a smaller plastic tank

Nick

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[boatone]

Re: Question whether the problem is real

I think you should leave well alone and get on with enjoying it. Fitting a new holding tank will be an arm and a leg job when all you need to do is empty the one you've got a bit more frequently. As for the genny its porobably no worse than having an extra passenger sitting near the aft end. Spend the money on more fuel for getting places ....oh, and buy Joanne some flowers, that way she'll think whatever you decide is wonderful/forums/images/icons/smile.gif

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[terryw]

Re: Question whether the problem is real

Can't you just adjust the trim tabs to bring the bow down a bit?

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[jfm]

Re: Question whether the problem is real

4kva is a pretty tiny genny - I was expecting you to say it was some monster job. So B1 is right, this genny will weight less than a person. There's no way the trim of a 40foot boat is significantly affected by a person standing in the aft cockpit, or not. I wouldn't notice any difference at all on our boat. On our 42 footer, we have a 6kva diesel genny, two aircon units, freshwater tank, hot water cylinder, a seriously heavy hydraulic passerelle, and a 3.2m RIB with 15hp elec start outboard with driver's console etc. All this stuff is well aft of the patio doors, and the dinghy is way back on the bathing platform. Yet we have no trim problem. The passerelle, RIB and aircons were added last year, perhaps 500kg all together, and I haven't even noticed any trim difference beofre/after. Your genny is nowhere near 500kg

Thus, removing a 4kva unit and changing a metal holding tank for a plastic one will make absolutely zero difference, imho (except praps more smell!). I would leave well alone, or look for some other cause.

 

[Nick2]

Re: Question whether the problem is real

Thank you all for some excellent advice here - i suppose that my biggest worry is that she sits so low at the stern with the bootline under water but then as you say - so what?

The engineer says not a safety issue so have given the genny and tank a stay of execution and am now reviewing stratergy. At least its given me an engaging afternoon!

Thanks again

Nick

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[jfm]

let\'s apply science

Nick, can you say how many inches the boottop is down, when the boat is at rest? It's worth trying to calculate the amount of weight that's causing this, by simple displacement/moment calculations, to see if we're looking for a 50kg or 500kg culprit. It might narrow down the search a bit? (I assume the boot top has been painted correctly by the way!)

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[Nick2]

Re: let\'s apply science

Joanne has just measured it to be about 6cm or so down on the port side . Intereresting to note that this is the other side to the genny. However the port side has the galley, gas bottles, lower helm, outboard (4hp Merc), kids toy box and no doubt a large quantity of Joanne's clothes. Should I be worried that boat seems lower on that side or should I just try to redistribute some weight to this side?

Nick

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[NorthernWave]

Re: let\'s apply science

Nick: How many fuel tanks do you have? Do the engine run off each tank seperately, and which tank does the heating and genneee run from? If you go large in the future you might find that the new boat already has a gen, and also you may even find 4kw not enough. (not sure why) We have a 6kw and I noticed the sunseeker I was in at the weekend was 9kw. I can't really see the point in spending so much money refitting the galley etc to reduce the weight of a boat you not keeping. Our birch also has a slight lean to starboard by about 3-5 cm which is often made worse by the fact that the port fuel tank feeds the most uneconomical engine, the heating and the gen.

Chris

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