HP vs Thrust

[Bucont]

Hi all
Just wondering if there is a conversion chart or formula for hp to lbs thrust. I have seen some Minn Kota motors rated this way and my curiosity got to me.

Thanks

[Bucont]

Thanks to all
I think I have found my own answer, approx 15 lbs = 1 hp

Bucont

[WillieB]

Actually that's not correct. A 45lb. thrust trolling motor does NOT have 3 HP...if fact no where near it.

One is a static measurement, the other isn't.

Go to www.minnkotamotors.com for the full explanation.Following is a bit of it...

How does thrust compare to horsepower?

Horsepower is a measurement of "work" being performed.
One horsepower is a unit of measurement equal to 550 foot pounds of "work" per second.
There is no direct correlation of thrust to horsepower. Contrary to what you may have been told, fifteen pounds of thrust DOES NOT equal one horsepower.
As noted in the previous definition thrust is simply a static measurement of force.
How does thrust compare to speed?

"My buddy has a 36 lb. thrust motor, we have the same size boat, yet his motor moves his boat just as fast as my 42 pound thrust unit. Why is this?"
Again, thrust is simply a static measurement of pushing or pulling power, and higher thrust does not necessarily mean greater speed.
Speed is a factor of prop pitch and motor R.P.M.
Given motor R.P.M. under load, and Minn Kota's 4" prop pitch, the approximate speed that a motor will push/pull a small boat can be calculated.
The formula for this is
.85 (4x) x 60 = Miles Per Hour
12 5280 (Motor RPM = X)

[Confused Thruster]

Ok, so what's the story here. What does is 45 lbs. of thrust equal to besides 45 lbs. of thrust?

[Confused Thruster]

still looking for enlightenment.

Please.