It’s really important to note that to do this right you need to know the specific fuel consumption (usually found in the OEM manual or commissioning data) and the percent load of the engine at those speeds. Fuel consumption may or may not be fairly linear compared to load, but higher speed may requ…

I agree wholeheartedly, a model is never perfect that should always be born in mind. However, it can be helpful and give a direction and guidance.

[image] Dutchie: a simple linear one con1/con2= (S1^3) / (S2^3) for con1 = con2 con1/con2 =1 (for con ≠ 0) S1^3 = S2^3 S1 = S2 Is 775/977 the slope of the line? Looks like the slope is square root of 775/977 The plot is S1 = S2 (Sqrt(D1/D2)). Correct?

Formally written y = m*x where m = 755/977 = 0.793245 and that is the slope of the line. The plot is S1 = S2 (Sqrt(D1/D2)). Correct? Yes, you can rewrite S1 = Sqrt [(S2^2 D1)/D2] as S1= (S2^2)^0.5(D1/D2)^0.5 = S2*Sqrt(D1/D2)

Isn’t m = 0.879 a better fit? At S1 = 10 S2 is about 8.8

Looks like the slope is square root of 775/977 Yes, my mistake, it would indeed be 0.879 that is rounded 0.88!

This one and two more is the only ones thats not adding up out of 25 questions .

Oh man… that is not the way for someone who self-styled himself ‘Captshane’ to get even more help. I’d like to congratulate the forum for the restraint they showed thus far. Thank you all for being professionals and letting a fairly low level algebra problem be an opportunity for exchange of info …

Hey u self proclaimed math wizards. Im old school i never had to learn this math crap to drive a boat before, i just needing some help on some of these fuel problems,i only asked two questions for help, if u cant help without acting like a jerk i dont need ur help

[image] Captshane: if u cant help without acting like a jerk i dont need ur help Well that’s a good thing considering… imagine asking all the folks on the forum who did work on this stuff and demanding to get their job without paying the same dues. Then imagine how little help you will be a…

Not for License Exam Fuel Consumption

Professional Mariner Forum

dbeierl February 7, 2020, 10:08pm 24

You’ve gotten a lot of help here, including everything you need to solve that problem. Time to buckle down and put your head to work. If you can’t figure it out, talk to a math tutor.

Topic		Replies	Views
Fuel consumption formula for license exam Professional Mariner Forum	32	5919	February 10, 2020
Fuel consumption formula Maritime Training & Licensing	1	5867	March 16, 2011
Any ideas? Professional Mariner Forum	22	2756	February 20, 2011
Given: 30000 pounds of fuel, .5 lbs of fuel burned per hp (horsepwer) hr (hour) Then how long to burn all of the 30000 lbs of fuel in a 10,000 HP Engine Professional Mariner Forum	33	2316	May 9, 2020
Fuel Oil Consumption Calculations Marine Technology	0	870	June 15, 2020

Not for License Exam Fuel Consumption

Related topics