Hi Storm,
If the two motors have different propellors, then it may be hard to compare them directly against each other. A motor that is over-propped for the specific load will pull more current with little speed increase.
You might try to get a meter to measure the actual current being drawn from the batteries. You may find that you really weren't using more power, in spite of the manufacturer's sticker.
Fair winds,
Eric
Marina del Rey, CA
--- In electricboats@yahoogroups.com, "storm" <stormconnors@...> wrote:
>
> I had an interesting experience with my Newport 16 sailboat. I have a 28 pound and a 50 pound thrust Minkota trolling motor. I went out to see what the battery life on a 12V NiCad battery pack would look like.
>
> Anyway, I hooked up the 28 lb thrust and measured 2.5mph on my GPS. With the 50 lb thrust I hit 2.6 mph!
>
> There isn't enough data to draw any conclusions but it was interesting.
>
> I will have to hook up some instruments to figure out if there really was an almost doubling of power that produced a negligable increase in speed.
>
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