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430 - Speed and diesel consumption

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sveino View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sveino Quote  Post ReplyReply Direct Link To This Post Topic: 430 - Speed and diesel consumption
    Posted: 10 November 2007 at 09:17
Hi !

I have now started planning the trip home with my new 430. Does anyone have any data about average speed motoring, and average diesel consumption ? I have the 55HP engine and 3 blade folding propeller.

Sveino


Edited by sveino - 10 November 2007 at 09:17
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Alain & Anne View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Alain & Anne Quote  Post ReplyReply Direct Link To This Post Posted: 10 November 2007 at 11:12
Hi Sveino,

We clocked some 280 hours  and 2600 NM with Uhambo since August. We have a 55hp engine with the Flex O fold 3blades.  I will get my numbers on the boat (probably tomorrow) and I will come back to you.

Cheers

What is your trip home?
UHAMBO 430e#004
White hull-teck deck-Yanmar 55hp-long range cruising
OCC

Our blog: www.uhambo.fr

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sveino View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sveino Quote  Post ReplyReply Direct Link To This Post Posted: 10 November 2007 at 11:32
Hi  Alain & Anne.

That would be great, Thanks.

I will sail from Stavanger to Finnsnes along the norwegian coast. I hope the boat is ready in Stavanger in about 2 weeks, and plan to start as soon as possible. I expect a cold and dark trip, so will sail/motor as quickly as possible.

It should be possible to do it in about 6 days, if I sail day and night, but there are some difficult areas around "Stadt" and "Hustadvika" I would prefer not to do at night. Time will show...

Best regards
Svein Olav
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hanse-1 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hanse-1 Quote  Post ReplyReply Direct Link To This Post Posted: 10 November 2007 at 16:22
Congratulation with a new 430, a great boat.
If you go with 2000 -2500 rpm the boat will do about 6.8- 7.5 nm/hour.
The engine will use from about 0,6l- 0,75l/nm.
Beware, the dieseltank may not take what is written on it.
From Stadt you will have the stream with you, about 1nm/h.
The Norwegian coast is very beautiful, even in the winter.
 
May your luff never stay slack.
 
S.L.
 
   
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Alain & Anne View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Alain & Anne Quote  Post ReplyReply Direct Link To This Post Posted: 19 November 2007 at 12:21
Hi Svein

Got the numbers!
Me clocked 231.8hours and used 685 l. Average conso 3l/h engine speed 2150rpm giving 6.5 knt.
In fact this an average conso including low speed sailing electricity generating. Our cruising speed was around 2150 rpm
UHAMBO 430e#004
White hull-teck deck-Yanmar 55hp-long range cruising
OCC

Our blog: www.uhambo.fr

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Merinalle View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Merinalle Quote  Post ReplyReply Direct Link To This Post Posted: 21 November 2007 at 06:18
Remember that variety is the spice of life for a diesel engine, too. It is recommended not to run the engine with constant rpm too long periods. On the contrary, max rpm time to time is good for the engine.


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Alain & Anne View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Alain & Anne Quote  Post ReplyReply Direct Link To This Post Posted: 21 November 2007 at 09:19
Hum Hum!!

What about diesel generating plant or genset which are running at constant speed in order to keep the frequency at a guaranteed value!!

And constant speed does not necessary mean constant load! That's why the question of propeller size is so important in term of engine guarantee.
UHAMBO 430e#004
White hull-teck deck-Yanmar 55hp-long range cruising
OCC

Our blog: www.uhambo.fr

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Merinalle View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Merinalle Quote  Post ReplyReply Direct Link To This Post Posted: 21 November 2007 at 20:16
Hi 2A,
 
Here is an answer for your question, a copypaste from Wikipedia:
 
"Medium-speed engines
 
Large electrical generators are often driven by medium speed engines, (approximately 300 to 1200 rpm) which are optimised to run at a set (synchronous) speed depending on the generation frequency (50 or 60 Hz) and provide a rapid response to load changes."
 
Notice that yacht motors classify to “High-speed engines”.
 
I admit that I am not a professional engine expert; maybe someone else could inform us more. Anyway, that’s the reason why I have tried to find out some basic facts about engines. A couple of years ago I discussed with a Yanmar dealer, and he suggested not using only a certain rpm for too long periods, because it has some kind of negative effect to the engine. (Honestly, I don’t remember the mechanism, but it was believable.) What is “too long time”, maybe some hours? Another advice was that the engine needs periodically high revs, too. Maybe once a month, when the engine is warm, some minutes with max revs would do the job?
 
I think that it is natural and typical to use quite low revs in order to avoid noise and fuel consumption – those unfamiliar things for sailors. Unfortunately, this kind of habit may be harmful for the engine in the long run.
 
As I mentioned, I am not a professional. Therefore I, too, would like to know more about how to use the yacht engine correctly when it is used to replace the wind.
 


Edited by Merinalle - 21 November 2007 at 21:00
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taduka View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote taduka Quote  Post ReplyReply Direct Link To This Post Posted: 28 November 2007 at 11:32
I delivered several 430 with 55hp. with Gori propeller at 2200 rpm you get 7.5knots confortably and consumption is about 3ltr/hr

Shawn
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Brad McMaster View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brad McMaster Quote  Post ReplyReply Direct Link To This Post Posted: 28 November 2007 at 20:23
Hi Shawn,
 
i know this is the 430 thread but i also know you have sailed many hanses, so what would the equivalent be on your 470?

B
GHOST - Hanse 470e - 058
http://www.sailblogs.com/member/ghost/
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