SailNet Community - View Single Post - fuel consumption gas vs diesel
View Single Post
Old 09-12-2009
JimsCAL's Avatar
JimsCAL JimsCAL is online now
Senior Member
Join Date: May 2007
Location: Glen Cove, NY
Posts: 2,522
Thanks: 2
Thanked 47 Times in 43 Posts
Rep Power: 8
JimsCAL is on a distinguished road
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.
Reply With Quote Share with Facebook