If you only need 6-7 miles range, it will be very simple and easy.
And, quite possibly it might cost in power while planing at 15 knots, or
at 4-5 knots.
There is no way it will not work, at slow speeds, for short ranges under
6 miles.
And for a relatively low budget.
You can always add batteries later, for near-zero incremental cost,
likely less.
Say, 20 kwh (10 kWh) of lion batteries now, 4000-2000 $ (200@kHw), and
add more of same, later.
Your props are likely to be the biggest variable.
And they might even work well, since you would then be so far outside
normal-use curves, there is no particualr reason to think they are
necessarily the weak spot.
Ie 2 prop meant to absorb 300 hp, 3100 RPM+.
Might actually work ok, at 4-8 hp per prop => perhaps the 4-5-6 knots
(note the 100% fudge factor).
The electric engines have so much torque, they can usually be driven direct.
Try to use electric engines of low rpm, lower is better.
Under 5 knots is actually slowish for an 11 meter boat, so the losses
are not yet that high.
On 24/04/2017 13:40, cliff_sadler@yahoo.com [electricboats] wrote:
>
> What I am looking to do is more like the e-Tolly project, but in an
> updated platform, and retaining my creature comforts of air
> conditioning, 120v power, etc via an onboard generator. I am lucky
> enough to live in an area where nearly everything we wish to do on a
> boat is well within an hour's reach at 6-7 knots. I needlessly carry
> around 800 hp that I rarely utilize. That is the whole point for me.
>
> https://www.youtube.com/user/WhoIsHayley
>
--
-hanermo (cnc designs)
Posted by: Hannu Venermo <gcode.fi@gmail.com>
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a New Topic | • | Messages in this topic (22) |
No comments:
Post a Comment