John,
Its better to go with an inboard motor setup on the Catalina 30. The smaller the propeller is, the less the range will be.
The Parson is better suited for a dinghy than the 10,000 lb. Catalina 30. Motoring into waves causes outboards to come out of the water.
Please see my blog for info on the conversion of our Catalina 30 including complete range graphs for batteries of all sizes.
James
On Aug 9, 2012, at 9:14 AM, oak wrote:
Thanks for the responses.Does anyone know if the Parsun takes a "standard" prop? For example, is the shaft the same as a Mercury or Nissan, such that I could walk into a prop shop and have a choice of options?Also,I looked at Rayeo.com - they *claim* to also be 5hp, but are more expensive than Parsun, and want a 60V bank. Seems reasonable that they might perform better than a similar "5hp" engine of lower voltage, or do they just draw less current at the higher voltage?99% of my sailing is just sailing around for the afternoon on the lake, with some potential for motoring for an hour or two. It would be nice to have two small battery banks instead of one large bank, so that if I run low on one unexpectedly, I can switch over to the other one. Kinda' like keeping that spare 3 gal. gas can just in case...This would be another case where two of the 24V Torqeedo's could be an interesting trade instead of a single 5HP Parsun. Uglier, but hedging one's bets? Does anyone keep a second bank of batteries in case they run down the primary bank?I also know that there's a lot to be said for the "burst" mode to get in and out of the dock. I very rarely run my gas engine (on the sailboat at least) at full throttle. Cruising is best at very low motor speed - any higher and it just makes more noise without pushing the boat any faster. I need a lot of power to back into a strong wind to get out of the dock, then need a lot of power to QUICKLY reverse direction and get steerage before I drift into a dock. But once out on the water moving forward, I'd probably go at half speed.JohnFrom: woody <boatnutwoody@yahoo.com>
To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
Sent: Thursday, August 9, 2012 9:48 AM
Subject: Re: [Electric Boats] Electric outboard for Catalina 30
If you are looking for an Electric Outboard with the power to move your 30' Look at the Ray Electric Outboard, It is able to move large tour boats that have a lot more drag as to compared to your sailboat. Ck out the web-site at http://www.rayeo.com/WoodyFrom: oak <oak_box@yahoo.com>
To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
Sent: Thursday, August 9, 2012 10:28 AM
Subject: [Electric Boats] Electric outboard for Catalina 30
I suspect that I can "push" a Catalina 30 with the Parsun 5HP outboard.I can probably even get it to hull speed, given enough room.Can I back into a 15-20mph wind getting out of a slip with it?I used to have a Catalina 27 (a LOT smaller), with a new 10hp four stroke (theoretically more thrust than a traditional gas 2-stroke), and found that I couldn't back into a fairly strong wind when trying to exit the marina. It would motor forward just fine, but didn't have enough umph in reverse to maneuver. Ever have that sinking feeling when you're at full power, but not making any progress, and you're side stepping closer and closer to the next dock??On the C-27, the motor was in a well, right behind the keel and rudder. I suspect that it lost a fair amount of it's effectiveness in reverse. If I mount a motor bracket on the back of a C-30, I'll be clear of the keel and rudder at the expense of having my power off-center (unless I do TWO!!!). (Hmmm... two smaller Torqeedo's might have the same power, and would give me full redundancy in case one decided to choke. But that would be a lot on the transom...)From the marketing - it sounds like a Parsun 5HP might do better in short bursts getting away from the dock, but I would really enjoy hearing if there was someone out there with actual experience using a Parsun on a C-30 or similar.I also agree that an inboard would be much less conspicuous. But an outboard is a whole lot simpler to "try out". :)JohnFrom: Mike Gunning <mike@electricyachtssocal.com>
To: electricboats@yahoogroups.com
Sent: Thursday, August 9, 2012 8:56 AM
Subject: Re: [Electric Boats] Conversion of 34' 10T sailboat to electric.
John,
Disclosure: I represent Electric Yacht.
Eric's posting is right on with regard to regen. The new systems from any reputable system vendor today will do regeneration but the limit is the ability of the boat to get to a speed that the regen is valuable. For the regeneration from a 30 foot boat will be about 50 watts at 5 knots and about 100 watts at 6 knots. With a larger boat the ability to provide enough power through regen for house use is effective. For a log range cuiser at the higher hull speed regen will be valuable as propulsion power replacement - longer distance sailing at 7 plus knots will put a usable amount of power into the batteries. I would always recpomend solar and wind combined to make a total solution.
In the hybrid diesel electric world we are experiening a closer to 2 hours of diesel propulsion while turning the electric motor generating power to replace about 1 hour of electric propulsion at 4 to 5 knots. These numbers are all dependent on the ability of the diesel to push the boat and drive additional power into the generation side of the electric motor.
The Catalina 30 is a great boat to move to an electric inboard platform. We have done about 4 of them in the last two years and I know other vendors have good success them. The biggest benefit I see to the conversion of a Catalina 30 is the vast improvement in the enjoyment value of being below deck and not having an ICE installed in your galley/living area.
We sell the electric outboards also but I am not excited about the look of an outboard hanging off the stern of a Catalina 30
Good luck with your project.
Mike Gunning - Electric Yacht of Southern California
--- In mailto:electricboats%40yahoogroups.com, "John" <thistle411@...> wrote:
>
> Regarding charging systems: I did not see regeneration mentioned. Electric Yacht's system provides for that.
>
> The electric powered 42 foot catamaran that Lagoon built a few of used re-gen, claiming that 2 hours of sailing, with the prop being spun by passing water, would provide charging used by one hour motoring. Ie: Motor out an hour, sail four hours, motor in an hour,= zero amps used.
>
> Here in Seattle, I know of an older Columbia 30 footer, that sounds a lot like your project. He's using the Electric Yacht system with re-gen and lithium batteries.
>
__._,_.___
.
__,_._,___
No comments:
Post a Comment