sailtones
Veteran Member
- Joined
- Jan 22, 2013
- Messages
- 97
- Location
- Montenegro
- Vessel Name
- Nostra Signora
- Vessel Make
- Marine Trader CHB 34DC
This may have been asked before, but using the search on the forum, I cant find anything on it.
Google has returned a few results but they vary, so let's try it here.
I pick up our 1979 Marine Trader 34DC in April.
I am starting to think about the details of the 330nm passage to get the boat from its current location to home. I will do it in one go if the weather holds. I want to establish a realistic boat speed for the passage that has reasonable fuel consumption.
During the survey and sea trials, I noticed the boat pushed out very little bow wave up to about 6 to 7 knots. After which she really dug in and started to move a lot of water as she reached 9 to 10 knots.
My questions is not about the exact fuel consumption calculations because every boat is engineered differently.
What I want to know is what speed does the boat cruise efficiently at with relation to the hull design and water line length. As a displacement boat goes faster, she digs in and pushes out more water, so the harder it works to do it, and the more fuel she consumes. Yes, yes i know, there are loads of other factors for the actual consumption based on engineering etc, but the displacement of more water is IMHO and experience a primary reason for such a significant increase in consumption.
I hope those of you with MT34's understand what I am trying to establish and can give me a good estimate for my passage planning.
Cheers!
Google has returned a few results but they vary, so let's try it here.
I pick up our 1979 Marine Trader 34DC in April.
I am starting to think about the details of the 330nm passage to get the boat from its current location to home. I will do it in one go if the weather holds. I want to establish a realistic boat speed for the passage that has reasonable fuel consumption.
During the survey and sea trials, I noticed the boat pushed out very little bow wave up to about 6 to 7 knots. After which she really dug in and started to move a lot of water as she reached 9 to 10 knots.
My questions is not about the exact fuel consumption calculations because every boat is engineered differently.
What I want to know is what speed does the boat cruise efficiently at with relation to the hull design and water line length. As a displacement boat goes faster, she digs in and pushes out more water, so the harder it works to do it, and the more fuel she consumes. Yes, yes i know, there are loads of other factors for the actual consumption based on engineering etc, but the displacement of more water is IMHO and experience a primary reason for such a significant increase in consumption.
I hope those of you with MT34's understand what I am trying to establish and can give me a good estimate for my passage planning.
Cheers!