All excellent points from Andy, I agree.
What is the proposed kWh capacity of the batteries, and cost/kWh of same ?
On 03/11/2015 16:07, mike@electricyachtssocal.com [electricboats] wrote:
>
>
> Andy,
>
> Excited about what you are building. My advice?If you are going to
> use the boat as a test/demonstration boat, you should get a boat that
> is more common in the market and would provide the most representative
> model for the market. If you are looking at 20kW outboard, I would
> want to know how it pushes a 13ft Boston Whaler which is a well know
> and popular boat which is often powered by motors from 9.9hp to 40hp.
> That would be a great demo boat to use in order for the market
> understand the capabilities of the motor.
>
> I also want to understand the 20kW continuous. Does it have a higher
> rating for short bursts? What is the voltage of the motor?The 1500
> RPM is good.The special propeller also is of interest.We know of other
> electric outboards that over compare their capabilities because in a
> controlled test their special propeller will perform better than what
> would be a real world usage.
>
> Outboards are rated at the propeller (thrust) which is vastly
> different than what inboards are rated. A 35 hp diesel (break hp) is
> actually about 28shp (shaft hp). That is what we all expect. My
> question is will your 20kW electric outboard therefore would likely be
> more comparable to a 28hp outboard (20000w / 746). Very impressive
> and I believe there is a market for such a quiet powerful motor. I
> would also think that a motor that would provide the thrust of a 9.9hp
> outboard would be even more popular.
>
> MikeElectric Yachts of Southern California/Pacific
>
--
-hanermo (cnc designs)
Posted by: Hannu Venermo <gcode.fi@gmail.com>
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