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Wild View Drop Down
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Joined: 18 March 2010
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Points: 937 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Wild Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2013 at 09:24
Swanji

If you reduce the diameter of the alternator pulley , you will increase the speed.
But most alternators are running on a ratio 1.5 and will supply max current between 1600 - 2400 rpm( rpm engine around 1.000-1.600 ) and than drop down a bit.
They can have a max of 12.000 rpm ( if a car runs 8.000 rpm x1.5 =12.000 it is only for a short time) but the current supply will not be higher than at 2.400 rpm only the voltage will becomes a bit higher.
A good smart alternator regulator will optimize this proces and the charging of your batteries a little.
If this is not enough get yourself a bigger alternator.
Wild and Wet
Belgium
545e#268
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CharlesP View Drop Down
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Points: 1208 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CharlesP Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2013 at 10:20
Originally posted by Wild Wild wrote:



But most alternators are running on a ratio 1.5 and will supply max current between 1600 - 2400 rpm( rpm engine around 1.000-1.600 ) and than drop down a bit.
 
I fully agree.  My Battery Monitor indicates that my standard alternator supplies maximun charge with engine revs of about 1200.
 
Charles
'MERIDIAN LADY'

320 Nr 536 2010

Medway
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samuel View Drop Down
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Points: 2770 		Post Options Post Options   Thanks (0) Thanks(0)   Quote samuel Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2013 at 18:40
Originally posted by Johan Hackman Johan Hackman wrote:





Apologies to Johan for using his picture & to others for hijacking the thread but i have been drooling over that boat
Can anyone really believe that the latest 34's can beat that version

Edited by samuel - 13 March 2013 at 18:43
Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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CharlesP View Drop Down
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Points: 1208 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CharlesP Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2013 at 19:03
The cockpit seems very cramped compared to later models. A wheel (or two) and wider cockpit is my choice for comfortable cruising.

Charles
'MERIDIAN LADY'

320 Nr 536 2010

Medway
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samuel View Drop Down
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Points: 2770 		Post Options Post Options   Thanks (0) Thanks(0)   Quote samuel Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2013 at 21:38
Originally posted by CharlesP CharlesP wrote:

The cockpit seems very cramped compared to later models. A wheel (or two) and wider cockpit is my choice for comfortable cruising.

Charles

I am not so sure that big wide sterns are nice for sailing - not so nicely balanced as Johan's boat i suspect
Also the side view is better on the earlier marques
Only my opinion - the real test will be sales volume

Edited by samuel - 13 March 2013 at 21:39
Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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Sea-U View Drop Down
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Points: 476 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Sea-U Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2013 at 22:02

I think they will be even wider in the future. With the right design it is more balanced than earlier, proper sail boats.

My previous boat was 38 feet and only 3.05 meter wide, well balanced. I have the feeling my 370e is better. Think it has to do with the wide stern. When heeling the wet area is not so asymetrical.

Ever seen the video of the guy diving from the keel?.
Sea-U is a 370e #532 located SW Norway
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Johan Hackman View Drop Down
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Points: 4361 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Johan Hackman Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2013 at 22:43
Originally posted by samuel samuel wrote:

Originally posted by Johan Hackman Johan Hackman wrote:





Apologies to Johan for using his picture & to others for hijacking the thread but i have been drooling over that boat
Can anyone really believe that the latest 34's can beat that version


I believe the 342 is the best version ever. Especially if it is blue and does not sport a sprayhood.

Johan

http://www.johanhackman.se
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Sea-U View Drop Down
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Points: 476 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Sea-U Quote  Post ReplyReply Direct Link To This Post Posted: 14 March 2013 at 18:50

Found the video where a man dives from the keel. These boats are quite contrary from old thoughts that a wide stern is bad.

http://www.youtube.com/watch?v=qpuEtkQNWn8

Sea-U is a 370e #532 located SW Norway
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panos View Drop Down
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Points: 1939 		Post Options Post Options   Thanks (0) Thanks(0)   Quote panos Quote  Post ReplyReply Direct Link To This Post Posted: 14 March 2013 at 20:36
Canting keel
Special downwind boat
Huge fun

Upwind performance? We do need to return. Don't we?
Panos

Hanse 630e - selling her -
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samuel View Drop Down
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Points: 2770 		Post Options Post Options   Thanks (0) Thanks(0)   Quote samuel Quote  Post ReplyReply Direct Link To This Post Posted: 14 March 2013 at 20:43
The figaro 33 is a case where a wide stern makes the boat more stable the faster it goes down wind
But as we know as the boat is going upwind the balance changes due to the distorted shape change
This often induces broaching as the rudder lifts out of the water & air goes down the top of the rudder causing stalling
I suspect Johan's boat would do this less than the modern 34 from Hanse or Perhaps an Elan( am i right in thinking the elan has 2 rudders to offset this?)

Edited by samuel - 14 March 2013 at 20:43
Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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