Scott,
I think we're pretty much on the same page regarding the solar stuff, and if anything we're probably a bit conservative. I haven't done much figuring in that arena, but it looks encouraging.
Stephan,
I still haven't got around to pulling the motor cover and counting the pulley teeth, but I think it's around 2:1. I'm sure it will have no real bearing on your potential installation since our boats are so drastically different.
Keep in mind that this is a 5000 lb boat that was designed for efficient running at displacement speeds. She is 25ft overall, lwl is 22ft, max beam is 8ft, and probably more like 7 at the waterline.
Here are some new numbers from today. It was blowing about 15 to 18 kt on the lake, with whitecaps and 12 to 18 inch chop. I headed straight into it for the first set of numbers. Some of the readings seemed a little off so I did them over. That's why the progression jumps around a bit. Later it occurred to me it was probably the gusty winds and random chop causing the variability.
The second set was taken going directly downwind in the same conditions.
Upwind:
Amps Volts Speed Watts HP
10 50.0 1.8 500 0.7
20 49.4 3.1 988 1.3
30 48.9 3.6 1467 2.0
40 48.3 4.4 1932 2.6
50 47.9 4.5 2395 3.2
60 47.5 5.1 2850 3.8
50 47.8 4.6 2390 3.2
70 47.2 5.4 3304 4.4
80 46.8 5.3 3744 5.0
90 46.4 5.5 4176 5.6
100 46.2 5.7 4620 6.2
70 47.0 5.1 3290 4.4
80 46.7 5.2 3736 5.0
60 47.2 4.9 2832 3.8
50 47.5 4.6 2375 3.2
18 48.8 3.0 878 1.2
33 48.2 4.0 1591 2.1
60 47.1 5.0 2826 3.8
Downwind:
10 49.1 3.5 491 0.7
20 48.6 4.2 972 1.3
30 48.2 4.7 1446 1.9
40 47.8 5.0 1912 2.6
50 47.4 5.2 2370 3.2
60 47.5 5.6 2850 3.8
70 46.6 5.8 3262 4.4
80 46.3 5.9 3704 5.0
90 45.9 6.0 4131 5.5
100 45.6 6.2 4560 6.1
Cheers!
Jim McMillan
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