Sunday, July 26, 2009

[Electric Boats] Re: Torqeedo Cruise 2.0 vs 4.0 questions

 

Good question.
The difference has to do less with the motors and more with hull size/shape/weight. If the hull is easy to push (light, narrow, shallow, etc...) and if the 1250 max rpm loads the prop only to 2kw then there is no difference in speed or power consumption in watts. Yes the 2.0R is a 24v motor and the 4.0R is a 48v motor but watts (in my example) will be the same.

Now, if you have a hard to push hull (wide, heavy, deep, etc...) you will not be able to reach full 1250 RPM with a 2.0R because of prop (over)loading. Here is where the extra power that the 4.0R can provide comes in handy and will run up to full RPM.

As previously stated, I am happy to offer discounted prices on Torqeedo products to eboat group members. Please contact me off list.
Todd
www.epowermarine.com

--- In electricboats@yahoogroups.com, "ravlegend" <ravlegend@...> wrote:
>
> Could someone enlighten me on where the Torqeedo Cruise 4.0 gets it's extra "horsepower" from over the Cruise 2.0 model?
>
> Both use 12X10 propeller.
> Both put out 1250rpm max.
>
> What variables am I missing?
>
> http://www.yachtproductsintl.com/custom.aspx?id=15
>

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