SailNet Community - View Single Post - fuel consumption gas vs diesel
View Single Post
post #17 of Old 09-12-2009
Senior Member
JimsCAL's Avatar
Join Date: May 2007
Location: Glen Cove, NY
Posts: 3,586
Thanks: 3
Thanked 130 Times in 122 Posts
Rep Power: 10
One thing to keep in mind: the power doesn't vary linearly with speed (and RPM), it varies with about the cube! So at 3 knots, you need about 1/8 the power you do at 6 knots. Reduce the speed by only 20% and the power is only about half of what it was. That explains the differences between the calculated fuel consumptiong based on rated engine power and actual consumption at cruise speeds.
JimsCAL is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome