Neither motor was producing it's rated thrust output; both were producing the same power - as much power as it takes to push your boat 2.55 mph.
Tie your boat to the dock, then they will produce their rated thrust. Trolling motors have very low pitch props, around 4", so they can push heavy fishing boats slowly. You would want maybe a 6 or 8" pitch prop to get the motor to produce its rated output on a light easily driven hull like yours.
On 6/12/2011 10:24 PM, storm 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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