too many variables. What is the sea/wind state? Currents? How heavily is your boat loaded? What is the state of your bottom? Windage from rigging, sail bags, etc?
I've been trying to guess how much fuel capacity I have for four years now. (I guess I am going to have to break down and just measure the darn tank and calculate it).If you want real fun, I've got a 44hp diesel and 2 30 gallon tanks that are an odd shape and defy measurement (they don't even have an access for a stick to measure with).
I monitor hours run, guess 1.0 gal a hour ( you have to adjust for rpm) and hope I don't run dry
That's going on my wish list.I have NEMA 2000 Fuel flow on my A4...
Average consumption is a nice to know; but what you really NEED to know is, in a pinch, what "performance" can I get per hour at the low end (max endurance/range) or, if I need to run fast for weather/tide/daylight/injury, do I have the fuel to do that. For instance, how fast can I make a Closest Point of Approach" to get/give help. I may need to adjust my plan if the fuel available prevents me from fighting a foul tide to make my destination. At what throttle setting do I get my "hull speed" and in what sea state does adding throttle just waste fuel for no incremental gain.Is fuel consumption a secret? I'm having a hard time finding the numbers and it seems as if the manufacturers don't want to give out the information. I want to put a 9.9 hp. outboard on a 26ft. Macgregor, the older models
(1990-1995) not the newer power sailboat type. I'm trying to find out what my fuel consumption would be to average 5 kts. Example: @ 4,000 rpm you should average 5kts and burn .6 gallons of fuel an hour…etc.
Anyone know of any sites with such info? Thanks for any help.