On using one gigantic lens to power motorized propellers,

 

it would need adjustment following the sunlight,

 

and calculating the speed of the ship itself.

 

 

So that calculation, alongside moving the lens

itself, that energy, would need to come from another

source,

 

and that is most likely solar panels.

 

 

Or, if in combination with the sails and

waterwheels, that too as well. (But this

would slow the propellers down unless

the waterwheels are extremely loose)

 

 

So for it to work, multiple energy sources.

 

 

 

 

Goal is speed using green energy.

 

 

 

But is it plausible, or will it just look awkward?

 

 

Is the question.