Getting Into Electric Power Catamarans

[calab]

30lbs/kw seems like a lot but I have not googled it to compare.
A genie to the controller to power the motor, many ways to go about it.
There was a young kid doing that with his ebike, I wish I was doing cool shit like that as a teenager.

[SlowCo]

I suspect it would be more efficient to use a small 4 stroke outboard motor together or in turn with the electric one. Less losses with direct propulsion.

[bobkart]

Definitely. But I want propane as it's much cleaner than gasoline in terms of emissions.

LEHR used to make propane outboards, but went out of business years ago. At the moment I just see (in the USA) 5hp propane outboards (Mercury, Tohatsu). That's enough power to go about 10mph, but they don't come in remote-control models. Then there's Seatan (out of China) with a line of propane outboards topping out at 20hp.

Setting aside Seatan, I'd need to either convert a 5hp tiller model to remote control, or convert a (say) 20hp gasoline remote model to propane. Most modern gasoline outboards use fuel injection, and my understanding is that a carbureted engine is easier to convert to propane.

[bobkart]

I'm selling last year's boat:

https://seattle.craigslist.org/est/boa/ ... 96169.html

[Hillhater]

Propane fuel cell ??...$$$$s

[bobkart]

Propane fuel cell ??

Any that I've found so far are either tiny in terms of power or expensive (or both).

[bobkart]

Longest run yet on this motor:

https://www.youtube.com/watch?v=gKxEHpio7E4

[bobkart]

Longest run yet up the Sammamish River:

https://www.youtube.com/watch?v=ZLzW7iqZXoY

[bobkart]

I made a video of how I install the battery on the boat.

https://www.youtube.com/watch?v=fmk1_ynLdwI

[bobkart]

Another recent cruise around Lake Washington, this time 16 miles in two hours.

https://www.youtube.com/watch?v=2RcZpSUF_-E

[SlowCo]

Really nice cruising.
Beautiful area and great that your electric drive works so well

[bobkart]

She finally got her name applied.

[SlowCo]

Ca(rmen)-tamaran Electra

[bobkart]

Working on a second, smaller battery, for use as either backup battery (5.376kWh), or to add to the main battery for more range (156 minutes of full power). Could also be used by itself for short outings (~50 minutes of full power).

GOPR0426-half-crop.jpg (577.72 KiB) Viewed 743 times

[bobkart]

https://www.youtube.com/watch?v=oU8O2HutjW4

[bobkart]

https://www.youtube.com/watch?v=-YdVS12uMfM

[bobkart]

https://www.youtube.com/watch?v=3x1A3PH1E2M

[bobkart]

First saltwater cruise:

https://www.youtube.com/watch?v=qXVGzUW_dfA

[bobkart]

https://www.youtube.com/watch?v=_N6CNWUZ6wA

[bobkart]

https://www.youtube.com/watch?v=xYEaI9KPPLk

[bobkart]

https://www.youtube.com/watch?v=Cnv3AW8SOgk

[bobkart]

https://www.youtube.com/watch?v=PaeR6AHwVkg