Dismasted 1000 miles off Hawaii !! - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 31 Old 08-27-2010 Thread Starter
Senior Member
 
Join Date: Nov 2009
Posts: 226
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 6
 
Dismasted 1000 miles off Hawaii !!

Just kidding. But now I've got your attention...
I'm curious to know if has any one done a thorough mileage / RPM comparison on their sail boat. If you disregard wind, current etc. and time was of absolutely no consequence what rpm range would be likely give you the greatest distance per gallon? Or more to the point: is there a point as you throttle back the rpms where you actually decrease your mileage?
I know all boats will vary, but is there a rule of thumb?
dillybar is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 31 Old 08-27-2010
Member
 
Join Date: May 2010
Posts: 41
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
You dont even deserve an answer.
SaltyMonkey is offline  
Quote Quick Reply Share with Facebook
post #3 of 31 Old 08-27-2010
Member
 
priscilla's Avatar
 
Join Date: Mar 2000
Location: Marblehead, Ma.
Posts: 85
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 16
 
Most engine manufacturers show fuel/RPM ratio charts that indicate the most efficient rate, But that all changes when you have to consider the boat, the prop the waterline etc. My diesel engine is the most efficient when it sounds good and feels good....but less RPMs, less speed, I'm certain burns less fuel.

Priscilla
priscilla is offline  
Quote Quick Reply Share with Facebook
post #4 of 31 Old 08-27-2010
美国华人, 帆船 教授及输送
 
Join Date: Sep 2006
Location: MD
Posts: 2,531
Thanks: 24
Thanked 23 Times in 15 Posts
Rep Power: 9
 
Quote:
Originally Posted by dillybar View Post
Dismasted 1000 miles off Hawaii !!
How old are you?


Fine Print:
I am old school. Integrity is to do the right thing even when no one is watching.
rockDAWG is offline  
Quote Quick Reply Share with Facebook
post #5 of 31 Old 08-27-2010
Senior Member
 
Join Date: Apr 2003
Posts: 4,192
Thanks: 50
Thanked 38 Times in 37 Posts
Rep Power: 15
     
Seriously dilly, you could have started your thread legitimately and gotten less flack and just as many answers.
Actually more answers
knothead is offline  
Quote Quick Reply Share with Facebook
post #6 of 31 Old 08-27-2010
Senior Member
 
Join Date: Aug 2009
Posts: 266
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
 
Quote:
Originally Posted by dillybar View Post
Or more to the point: is there a point as you throttle back the rpms where you actually decrease your mileage?
I know all boats will vary, but is there a rule of thumb?
I thought we were sailing!
sailor50 is offline  
Quote Quick Reply Share with Facebook
post #7 of 31 Old 08-27-2010
Banned
 
Join Date: Apr 2006
Location: MS Gulf Coast
Posts: 711
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 0
 
I thought it was an under-age girl on a circumnavigation!
seabreeze_97 is offline  
Quote Quick Reply Share with Facebook
post #8 of 31 Old 08-27-2010
Senior Member
 
jerryrlitton's Avatar
 
Join Date: Oct 2002
Location: Phuket, Thailand
Posts: 1,608
Thanks: 5
Thanked 18 Times in 18 Posts
Rep Power: 13
 
Maybe I can add a little bit of an answer to the question. Now, as a pilot we do have a thing called best range airspeed. It is dependent on density altitude, weight etc. I am sure boats have about the same thing. Now here is the rub, it is only accurate in still air (water) so you add a bit (exact formulas vary) of airspeed for a head wind and subtract for a tail wind. Very general I know but now we can look in the correct direction.

Jerry

"Let there be light!" said God, and there was light! "Let there be blood!" says man, and there's a sea!
Lord Byron, Don Juan


S/V Temptation
Islander 44
Very non-production
(Well, 10 were made so sort of non production)






To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
jerryrlitton is online now  
Quote Quick Reply Share with Facebook
post #9 of 31 Old 08-28-2010
Senior Member
 
Join Date: Dec 2006
Posts: 296
Thanks: 10
Thanked 3 Times in 3 Posts
Rep Power: 9
 
the child who cried wolf ?
norsearayder is offline  
Quote Quick Reply Share with Facebook
post #10 of 31 Old 08-28-2010
Senior Member
 
Join Date: Jul 2006
Posts: 1,370
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 10
 
Quote:
Originally Posted by dillybar View Post
Just kidding. But now I've got your attention...
Stupid.


And just for you, google ' Sparky,Pearson Elecktra, 2008 Single Handed Trans Pac
puddinlegs is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacement for the Xantrex Link 1000 PeteatBeach Electrical Systems 3 08-09-2010 08:22 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome