Sunday, November 29, 2015

Re: [Electric Boats] new member

 

Hello Myles , and thanks for your estimates of speed vs. range.
I'm sure I'll be able to fill in my own figures after a little experience on the water.
I visited the evalbum site you sent me.
That's a sweet easily driven boat you have there and I never knew there were electric cars back in 1911.... Somebody tried to kill the electric car twice it seems.
 You mentioned the Honda 2Kw generator that you have and the increased range you obtain using it.
I have the same generator on board my boat as well.
Do you run the generator and plug in the battery charger to augment that range or is there some other trick?
 Thanks    Simon

On Fri, Nov 6, 2015 at 10:01 AM, 'Myles Twete' matwete@comcast.net [electricboats] <electricboats@yahoogroups.com> wrote:
 

Thanks Simon, and welcome to the forum J.

 

With nom. 214Ah lead acid at 48v, you're looking at around 10kwh 100% discharge.  Practically, you're looking at 60-70% of that, or 6-7kwh/charge.

I'd guess that your burn rate vs speed would be something like this (probably very wrong):

 

Speed   Watts    MaxTime & Range (@7kwhmax)

3kt          500         14 hrs, 42n-mi

4              900         7.8hrs, 31n-mi

5              1.8k        3.9hrs, 20n-mi

6              3.6k        2hrs, 12n-mi

7              7.2k        55min, < 7n-mi

8              15k         25min, 3.5n-mi

 

Your mileage may vary…

Speed kills range---up there in the Gulf Islands, you already know this, but you'd better be sure to time your tides J!

 

Look me up if you get down to Portland-

 

-Myles

 

P.S. – I'm running with 21kwh of lithium for my pack these days---will be 35kwh when I'm done.

Sam McKinney's Scow Barge Cruiser "The Reach Of Tide": www.evalbum.com/492

His book: http://osupress.oregonstate.edu/book/reach-of-tide-ring-of-history

 

 

 

From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com]
Sent: Sunday, November 01, 2015 7:25 PM
To: electricboats@yahoogroups.com
Subject: [Electric Boats] new member

 

 

Thank you Myles for inviting me to join the group.

About 10 years ago I started to build a 35' steel sailboat, a Wylo II of 14,000 lbs. displacement.

I looked forward to buying and installing a sturdy diesel. Five years ago I bought a 3 cyl. 23 hp. Izuzu, lifted it in , installed the shaft and lined it up.. When it came time to hook up fuel filters, water separators, a lift pump, hot wet exhaust, etc. etc., I wanted to make it perfect, but  knew I probably couldn't and so I left the installation and went on to other things.

Then I discovered electric propulsion  and went out and bought a Thoosa 9,000 and installed it and a bank of 4 Odyssey PC 1800 FT, 214Ah batteries.

I just launched the boat last month and only have experience of motoring around the marina.

I am impressed and so are many other people. The big question for most people is "But how far can you motor?".. I admit, it's a bit of a question for me too.

The boat's name is Saltarelle and I'll open an album and post some photos.

Very much  looking forward to sharing experiences.

Simon  Gabbott on Gabriola Island, west coast of Canada


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Friday, November 27, 2015

Re: [Electric Boats] Okay, time to start thinking about electric propulsion for my pirogue.

 

Found a trolling motor rated for salt water for $129 new, 35lb thrust, 12v, and already pulled the trigger on it. So now I just got to get a PWM brushed motor controller. The controllers I have are all for brushless motors. Any suggestions? I dont need electronic reversing, brake cutout, or regen. Actually thinking about building the controller. I got some dandy SCR's from some 100hp motor winding heater controllers that got replaced on my ship, including heat sinks and some other doodads, and I think these would make a nice sine wave power stage. I have several so if I blow up a couple in the pursuit of a working unit, no biggie.

I am thinking a Pelican watertight sextant case for the battery, in case of a capsize, with maybe a 15a fuse holder on the + terminal. I am not too sure about the built in circuit breaker on the battery pack. Just so happens I know where I can get the sextant case for nothing.

Well I found a controller and I cant build one that cheap even if I already have some of the parts for it. 48V - 1000 Watt Controller (LB37 for Brushed Motor)

 

Says 30a but that must be peak current. 1000w 48v looks like call it 20a to me. still probably twice what I need. I'll epoxy a pot on the tiller for the throttle, I guess. The electro-pirogue is quickly becoming a reality. The money is all spent and that is always the hardest part for me. I just got to wait on the stuff and wire it all up.

Maybe I should get a second pirogue and make an electro-pirogue-maran. I always wanted an electric mini party barge with a Lay-Z-Boy recliner for my captains chair.

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[Electric Boats] Re: Solar Bimini [6 Attachments]

 
[Attachment(s) from moriartybob@yahoo.com [electricboats] included below]

Took a few more pics today - mostly of the underside of the two-panel array. A few of thr pics show the wooden shims that helped get rid if the slight sag in the array amidships. Initially I was going to bolt on some aluminum angle but the shims are much simpler. Going to sand away the white paint and go with bare metal for the tubes.
Bob Moriarty
Ox C&C 33-1
Jax, FL

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Thursday, November 26, 2015

Re: [Electric Boats] Okay, time to start thinking about electric propulsion for my pirogue.

 

Depends on how cold the water is, the only thing that kills them is heat, i use a small one with a modified larger 3 blade prop on my 37 ft catamaran for a bow thruster.  Look for a 24 v model if you are that worried.

On Nov 25, 2015, at 5:15 PM, king_of_neworleans <no_reply@yahoogroups.com> wrote:

 

I see a lot of old 12v trolling motors in pawn shops etc and many use a resistor network for speed control instead of a PWM controller. So it makes sense to bypass all the resisty stuff and hook up a cheap PWM box to the motor leads. My e-bike uses a 48v Lithium battery pack. Got one, and one on the way. Same with chargers. So naturally I want to use one of these packs for the pirogue. Tell me if I am wrong here... I want to use the 48v pack with a PWM controller and 12v motor. I dont see why this wont work as long as the average voltage of the motor supply doesnt go much over rated voltage of the motor. Comments? Suggestions? Keep in mind this is a shoestring budget operation but I am tired of paddling.

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Wednesday, November 25, 2015

[Electric Boats] Okay, time to start thinking about electric propulsion for my pirogue.

 

I see a lot of old 12v trolling motors in pawn shops etc and many use a resistor network for speed control instead of a PWM controller. So it makes sense to bypass all the resisty stuff and hook up a cheap PWM box to the motor leads. My e-bike uses a 48v Lithium battery pack. Got one, and one on the way. Same with chargers. So naturally I want to use one of these packs for the pirogue. Tell me if I am wrong here... I want to use the 48v pack with a PWM controller and 12v motor. I dont see why this wont work as long as the average voltage of the motor supply doesnt go much over rated voltage of the motor. Comments? Suggestions? Keep in mind this is a shoestring budget operation but I am tired of paddling.

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Re: [Electric Boats] Re: outfitting a sailboat

 

We must be bruthas from a different mutha. I have a pirogue that I plan to electrify. Fiberglass, 13'. its on the deck of my boat right now. And I have a 48v 1kw ebike with lithium pack. And I was figuring on getting a second 30ah pack just for the pirogue (ordering later this afternoon!) and also so I would have a second charger for the ebike to leave at work. I built my ebike from a Chinese hub wheel kit and a cheapie walmart bike so with racks, baskets, panniers, kit, battery, all told I have about $850 in it I guess. Top speed currently 34mph, 30 mile range at 18mph. Very practical commuter and light grocery getter. I wont be buying a fossil fuel car anytime soon. Loving the ebike, yeh.

I was going to modify a trolling motor for the pirogue. Didnt want to cut a stern tube hole or mount a rudder, and didnt want anything protruding, so I can still drag it up on my dock from the water easily. Sounds like you did some pretty major mods on your pirogue hull. You steer it with a rudder, or paddle?

I guess since my pirogue is also my dinghy and my ebike is my park-aboard shore transportation, this hasnt gone too far off topic... :o\

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Re: [Electric Boats] Re: outfitting a sailboat

 

Hi, King --  No particular brand, it looks like the voltage reducers are made someplace and many are vending the same one on Ali Baba.com .  I just bought whichever 48 v. to 12 v. one that had reasonable amps for a particular circuit.  Dash lights, and nav. instruments, bilge pump on one with a fuse ---  accessories, stereo, radio, reading and cockpit lights fused on another.  Trolling battery draws too much, so separate battery / charger on that part.

This am I will look for a 48 v. to 12 v. drop inverter so I can use my bike EV lithium pack as a back up, or power for my electric folding Louisiana 12 ft.progue.   That could benefit from lighter weight the most, and give me an extra use for that $400. battery pack.   The battery is under the seat, and an inboard power head, so in is not seen under way, uses a tunnel to house the power head.  My sneak about, but I did get registered to be legal. 


Have a great Thanksgiving,   Cal

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Re: [Electric Boats] Re: outfitting a sailboat

 

Nice, Cal. I had not seen any that cheap. I think I will look for one when I got time. What do you figure the current is through the 48v side with zero 12v load? Is it specified in the data sheet for any of the ones you got? Do you have a brand name, or a vendor name? Thanks.

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[Electric Boats] Re: Solar Bimini

 

With my fixed length topping lift the boom is in line with the array and ends about two inches from its leading edge. I briefly considered chopping off a foot or so of the boom and placing the array more forward but decided that was too extreme for me. Under sail the boom will ride a little higher than the array and not cast any shadow on it (when the sun is directly overhead).

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Tuesday, November 24, 2015

Re: [Electric Boats] Re: Solar Bimini

 

Yes, exactly.
Looks very professional, and well done.

Also, unlike most installs I have seen the panels are big.
This is excellent, as the losses go way down.

Boom does not foul the support legs of the solar array, no ?

On 25/11/2015 00:48, moriartybob@yahoo.com [electricboats] wrote:
> Hi Hannu.
> If by "white bit" you're referring to the short spacers on the corners
> between the panel and the 90 degree stainless elbow, they're just 1
> inch (inside diameter) PVC pieces that fit perfectly over the 1 inch
> (outside diameter) aluminum tube.
> If you're referring to the way the bimini frame is attached to the
> solar panels, that was done with a 1 inch hole saw and some careful
> measuring and drilling through the panel frames. I did have to
> slightly enlarge one of the 8 holes that I drilled to get everything
> assembled.
> BTW, I got rid of most of the previously mentioned slight sag with
> some shims between the lower lip of the frame and the transverse
> aluminum tube running above it.
> I'll try to take and post some pics of the underside this weekend.

--
-hanermo (cnc designs)

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[Electric Boats] Re: Solar Bimini

 

Hi Maureen,
By "how does that work?" are you referring to the tilting back of the solar array? Similarly, does "hardware used?" refer to all of the hardware or just the "tilt-back" stuff? And finally, does "pic with it in sailing position" refer to pic with array tilted back 45 degrees? 
Hoping to help,
--Bob M
Ox C&C 33-1
Jax, FL

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