Nordhavn - a surprising boat!!!

[MapisM]

I'd also expect the roll without stabs to be different between the two boats, but not necessarily worse for the Nordhavn.
When comparing a heavy full-D hull with a light(ish) semi-D hull there are many factors affecting the behaviour. One of the most important is that full-D hulls are ballasted, thus lowering the gravity center.
For example a Norhavn (which, mind, is a LIGHT vessel in the full-D category, not being made of steel), has 10% of her weight as ballast. As a consequence, in a cross sea the boat should rather tend to slide sideways, than roll many degrees.
Anyhow, the main difference for comfort is not made by a few rolling degrees more or less.
It's the "speed" of reaction to any movement (both rolling and pitching) which count.
Heavy full-D hulls tend to react much more slowly and gently, compared to anything lighter.
That's the main reason why - in principle - they should be more comfy, if compared to lighter semi-D boats.
A proper stabs system, on the other hand, can smooth these differences a lot, thus making the comfort level much more similar.

 

[Bloater]

Just make sure that you have enough fuel in the tanks before you start your journey. Recalculating mpg during the voyage is irrelevant as you can't refuel until you get to your destination. You can alwways attempt to calculate mpg after your arrival.
I would love a Nordhavn, free fuel and endless paid leave. Well actually I would settle for any of the three.

 

[Observer]

[ QUOTE ]
Just make sure that you have enough fuel in the tanks before you start your journey. Recalculating mpg during the voyage is irrelevant as you can't refuel until you get to your destination. You can alwways attempt to calculate mpg after your arrival.
I would love a Nordhavn, free fuel and endless paid leave. Well actually I would settle for any of the three.

[/ QUOTE ]

I plan a passage of (say) 100 miles. I know my fuel consumption, by empirical observations, is 1mpg at 20kts (fast cruise), 1.5mpg at 15kts (slow cruise), 3mpg at 7kts (displacement). So I know I need 100 galls + reserve at fast cruise and I can eke out the fuel by reducing speed, if necessary.

or:

I plan a passage of (say) 100 miles. I know my fuel consumption, according to the manual, is 20gph at 2600rpm (fast cruise), 10gph at 2000 rpm (slow cruise), 2.3gph at 1200rpm (displacement). Unless I also know my through the water speed for each engine speed setting, I can't complete the calculation of fuel needed for the trip. Yes I may have taken observations and made up a table but I still need to do two separate calculations.

(I think these fuel consumption values are identical, if the speed at each throttle setting is taken to match the speeds in the first scenario)

The mpg value is much more helpful, in practice, than gph (in my opinion). Further, the mpg figure will have been (probably) averaged out over a period of time on the basis of a mix of sea conditions and temporary throttle variations so will be a more reliable method of predicting consumption than the theoretical fuel burn value taken from the manual.

 

[KevB]

[ QUOTE ]
I plan a passage of (say) 100 miles. I know my fuel consumption, by empirical observations, is 1mpg at 20kts (fast cruise), 1.5mpg at 15kts (slow cruise), 3mpg at 7kts (displacement). So I know I need 100 galls + reserve at fast cruise and I can eke out the fuel by reducing speed, if necessary.


[/ QUOTE ]

is that with or without a 4 knot tide?

 

[lookout]

blimey KevB !

if you're able to allow for the effects of a 4knot tide when thinking gph - ie it'll take a bit longer, so more hours = more galls.....

why on earth can't you see that Observer et al is able to do the same allowing as you can? except he thinks in mpg ?


/forums/images/graemlins/confused.gif

 

[rickp]

GC1-style trolling, I think.

Rick

 

[Observer]

[ QUOTE ]
[ QUOTE ]
I plan a passage of (say) 100 miles. I know my fuel consumption, by empirical observations, is 1mpg at 20kts (fast cruise), 1.5mpg at 15kts (slow cruise), 3mpg at 7kts (displacement). So I know I need 100 galls + reserve at fast cruise and I can eke out the fuel by reducing speed, if necessary.


[/ QUOTE ]

is that with or without a 4 knot tide?

[/ QUOTE ]

It's cross-channel so the tidal vectors are neutralised (as is your objection).

 

[oceanfroggie]

I too have been smitten by boats like Nordhaven, especially compared to the sterile modern flash oversized speed boats that are often referred to as sports cruisers. I'm very much with 'oldgit' and 'gludy' on this one, they are in fact tuned into 'state of the art' cruising as oposed to day boating on what are really just big speed boats that have been caught taking too much steriods. The trawler yachts have a certain class and superior style lacking in many of the imprezza plastic flashes, not to mention real useability for cruising. Ducking now for inbound hail /forums/images/graemlins/wink.gif /forums/images/graemlins/wink.gif

At the moment we have a Broom and very happy with it, but some of their newer stuff coming down the line imho is loosing the plot in terms of styling - ughh - too much sterile boy racer grey carbon fibre helms, square doors, no window frames, stainless steel, and those awful office blinds on the front windscreen - ugghh! Bring back cozy boats that are a home from home. I can see us switching to something like a Nordhaven down the line - a real little ship with a front, middle bit that sticks up and an end, instead of a white streak of modern art about as cosy as sleeping in a milk carton. /forums/images/graemlins/smile.gif /forums/images/graemlins/smile.gif

 

[KevB]

[ QUOTE ]
GC1-style trolling, I think.

Rick

[/ QUOTE ]

Well think again. /forums/images/graemlins/mad.gif

 

[Nautical]

Paul, I have mentioned it before but from the criteria you have set out the flemming 55 is just spot on, very economical at displacement, has a bit of ooomph when you want, built by a fanatical man obsesssed with detail and a very very solid boat to handle the roughty stuff.

We have been through the same process a year ago and are still thumbing through everything in prep for our Scadinavian aventure in 09 and we still keep coming back to the Fleming, certain bits are not as we would like but as an all round package and a pretty solid second hand market when we are finished with her it looks like it does it for us.

 

[Renegade_Master]

he ain't no troll hes flesh and blood I know :~)

 

[Renegade_Master]

I must say Gludy's threads always provoke lots of healthy debate... mind you my bit to oldgit has got lost...maybe hes asleep zzzzzzzzzzz when your that age you need lots :~)

 

[muckypup]

Ahh Paul, I see you have taken my advice on Nordhavn after our conversation the other day /forums/images/graemlins/laugh.gif

It was only fair after all the advice I received /forums/images/graemlins/smile.gif

I would be interested in any vids. I have watched the promo ones off their site, and got them to send me a copy of their transatlantic rally dvd they have done, but they only tend to show the glossy bits.

S.

 

[Gludy]

Muckpup - its seems that when I try to help people by arranging an agency intro then supplying the customers all that gores out the window as soon as the word 'video' is mentioned. /forums/images/graemlins/smile.gif

So you ask me now to do it all again? /forums/images/graemlins/smile.gif

I actually asked the Nordhavn people and you know what - they welcomed the idea - they saw it as great publicity.

I took my video to the sea trail but left it in the boot of the car as it seems to upset people these days hence this time - no video.

I will be shooting a proper video this winter with Jez and have now decided to visit a few boats where I am actually welcome and produce short 15 minute videos of them for web publication - a sort of Gludy point of view of the boat. So if anyone out there want to allow me on their boat to shoot such a video let me know.

I will be making some proper videos of Marlow boats by simply going on boats that are already sold and where the owner invites me on. I really do not see what all the fuss about the last video was about - I have even been told that action may be taken against me for all the damage the video caused!!!!! Wow - being sued for non stop praise of a product causing many complimentary remarks by all on that thread must be a first!!!! Of course I appreciate that for anyone to sue me they have to show a few things including damage and I frankly laugh at how far down the road this matter seems to be going. ......... drat, there I am again drifting off the thread.

Anyway I now intend to do some videos of boats for web publication - it keeps me near boats whilst boatless and is interesting so if any dealers or even individuals approach me I will schedule a shoot and publish on the web for all to see. its a great way of showing a boat and I would suggest to anyone at a show with a strict appointment system also hand out DVDs to those who cannot make an appointment together with an invite to view the boats back ay base.

 

[muckypup]

[ QUOTE ]
I have even been told that action may be taken against me for all the damage the video caused!!!!! Wow - being sued for non stop praise of a product causing many complimentary remarks by all on that thread must be a first!!!!

[/ QUOTE ]

There's nowt as queer as folk... /forums/images/graemlins/smile.gif

S.

 

[BrendanS]

[ QUOTE ]
I have even been told that action may be taken against me for all the damage the video caused!!!!!

[/ QUOTE ]

They can't be serious surely? Bluff and bluster more likely

 

[powerskipper]

HERE ARE A COUPLE OF PICS i TOOK OF i THINK THE 40 SOMETHING ONE.

BRAIN NOT IN GEAR, SORRY FOR CAPS AND COUNTING ERROR /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif

 

[Nautical]

Well you are welcome to video anything of ours top to bottom and publsh anywhere you want friend!, I think its a great idea.

Oooh I can just see it, world exclusive......Gludy takes the helm of the worlds fastest IPS production boat /forums/images/graemlins/grin.gif .......Rock on ! .... /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif

 

[longjohnsilver]

If it was the one at SIBS then it was 43'. Fabulous boat. One of my best mate's looking at buying a 60 odd foot one sometime soon. Great deals with the exchange rate the way it is.

 

[powerskipper]

think it was, she had one cabin as a sleeping cabin /office. nice solid chunky boats /forums/images/graemlins/grin.gif