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Yamaha Fuel Management Gauges
On Jul 4, 9:03*pm, John H. wrote:
On Fri, 4 Jul 2008 17:11:39 -0400, "Jim" wrote: "John H." wrote in message .. . On Fri, 4 Jul 2008 11:18:42 -0400, "Jim" wrote: "Richard Casady" wrote in message ... On Fri, 4 Jul 2008 06:29:26 -0400, "Jim" wrote: "Graham" wrote in message news:ypjbk.54744$Jx.31786@pd7urf1no... Does anyone know if these gauges display miles per gallon (or litres per km) or just miles travelled and gallons consumed? Do they need any special interface to work with standard GPS's like a Raytheon chart plotter? Thanks, Graham The GPS reports miles per hour over land. It would be useless to use those calculations in determining real miles per gallon over the surface of the water. It reports MPH everywhere equally well. It doesn't know sea from land unless you get it wet. It reports speed over the land and if the land is flooded, at sea or on a river, * *THIS IS THE WHOLE POINT. If you are heading against a 5 kt current at 10 kts, what speed will the GPS report? 10 knots. But, without the current, you'd be making 15 knots all else being equal. Wrongo old bonged one. The GPS sees you doing 5MPH over ground. What matters on a boat is your speed thru the water. Speed thru the water is determined by your throttle position which has a relationship to RPM and GPM. These things are predictable and repeatable. When you want to know ground speed toward destination you need to take into consideration current and drift.. Same thing in an airplane. There is ground speed and air speed. They're different. Sorry you got bonged. I wonder why Harry got less jail time for a more flagrant rule violation? No. You assumed the 10 knots was the speed over water, I assumed the 10 knots was the speed over ground. No problem with the bonged bit, and since I didn't see Harry's stuff, I can't comment. Chuck and I have been having a running discussion about 'the threesome' and their behavior. Apparently he's decided that discussion and criticism of his rules is against his rules. And, that's OK. I wish he'd said so up front. http://www.tradebit.com/filedetail.p...19-Sounds-MIDI |
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