Then it's actually producing 0. At 24 volts that's about 26 amps; at 12 volts, more like 52 amps. To compare against a gasoline engine is a little harder. Shaft power has the exact same meaning regardless of what is turning the shaft.
You'd probably find that a 2 hp outboard at about one-half to two-thirds throttle would be roughly equivalent. Now, all of what I've just said rests on a big assumption- that we actually know what thrust the trolling motor is making at a given speed. Short of putting strain gauges on its mounting bracket, we generally don't- and can't- know this value accurately.
But the key message in all that math I just posted is this: You cannot make a direct comparison between thrust force and power, unless you also know the speed of the vessel when it is absorbing that thrust or that power.
Depending on which math formulas and efficiency assumsions you want to accept, a single HP is some where between 75 and pounds of thrust. For an average trolling motor, figure towards the high end of this scale. If using a better prop, then comes with the typical trolling motor, then the some place in the middle. The pounds of thrust, 24 volt motors are about a single HP. PAR , Nov 16, I know formulas vary , but I always use 20 lbs for most boats , 25 for really good prop setups and 30 as the dream of "perfect".
Perhaps Rick will bridge the huge difference between 25 and lbs per hp. Guest , Nov 16, It's not a simple nor direct conversion HP to pounds of thrust. What brand is the most reliable? If you can afford a 5hp, get a 5hp. That is true when using a static test. If using an actual thrust test is closer to foot pounds.
Thrust and horsepower are not directly related and therefore not easily converted. Here is a link that explains how to convert them. I was thinking like you a few years ago. I had a 30 TM on my 10' jon and wanted more speed.
I got a 55 TM and it did not go any faster. I now run a Evinrude Lightwin 3 hp, with a 1 gal. It's a perfct match for my small jon, just fast enough and still safe and easy to handle. You can post now and register later. If you have an account, sign in now to post with your account.
Paste as plain text instead. Only 75 emoji are allowed. Display as a link instead. Clear editor. Upload or insert images from URL. Write for BassResource! One of the loudest sounds made below the waterline by most other engines — electric trolling motors included — is prop noise, directly related to prop speed. In other words, slow down. You can significantly cut the level of noise simply by backing off on the throttle.
Most trolling motor batteries fail due to lack of proper charging. We suggest selecting a 12 volt deep cycle marine battery with at least a amp hour rating, usually a group 27 size battery. The higher the amp hour rating, the more run time you will receive.
General rule of thumb: you need at least 2 lbs. Two motors in the back will just push the bow a little higher in the air, and the stern will dig in deeper, slowing you down. For a cable steer or hand controlled model this will not hurt the motor, but it will considerably affect the performance of the motor. However, an electric steer motor, such as, the PowerDrive, Terrova, or Ulterra cannot be used on lower voltages.
Begin typing your search term above and press enter to search. Press ESC to cancel. Check out our comprehensive guide here: Trolling Motor vs Outboard. So when you increase engine horsepower or thrust, you may need a different prop to take advantage of it if the previous horsepower thrust reaches its top speed. A motor might not push a boat any better than a 48 if both use the same prop. How to convert thrust to horsepower? Actually, is there a relationship between hp and thrust?
Can thrust be converted to horsepower? The short answer is YES, but the lb thrust to horsepower conversion is a little tricky. Today we are gonna work out how to translate pounds thrust to horsepower in the easy way! In fact, the thrust and horsepower measures totally different things: The pounds of thrust is a static force measurement.
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