Exciting New EPS Thruster (& Propulsion)

low voltage hubless drives 2 to 8 kW

I would like to inform you that we introduced the Torque-Jet hubless drives on the Dutch market this past spring. We have four models available, 2, 4.5, 6.5 and 8 kW, ranging form 24 to 48 Volt. The motor is build in cooperation with Rotorque-Jet in Germany.
For more information http://www.destilleboot.nl/ringmotor (in Dutch, English will follow soon)
 
In cooperation between KaiserWerft and Voith a new 45m project has been initiated. The Evolutionary project with Electro Magnetic Propulsion System will be first Mega Yacht application in the World on our 45m project

KaiserWerft. Welcome to the home of Mega Yachts.
 

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Electric Motor Propulsion for 40 foot sailing catamaran

...ltr I recently sent to a few Euro manufacturers/developers of small scale electric drive systems for vessels.

Electric Motor Propulsion for 40 foot sailing catamaran

Dear Sirs,
I am working on a design for a 35-40 foot catamaran that I term a picnic/weekender catamaran. The concept will be somewhat similar to this one I found in Thailand a few years ago. I posted it on several boating forums a few years ago.
http://www.yachtforums.com/threads/weekender-picnic-powercat.13966/#post-173670

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This particular catamaran was a powercat. I will be adding a sailing rig to it. I will also adding a trolling/fishing chair area to rear deck area,... so that pictured Zodiac dinghy will be relocated, and the two outboard engines need to be eliminated.

I need to repower this cat design, both for close quarters docking situations, and for some motor/sailing situations.
I have had a very long time interest in the rim-drive propulsion concept.


What I have in mind at this moment is how I might adapt this Vetus Rim Drive unit to be my single primary propulsion propeller. I would like to mount it in the aft portion of a of the wingdeck of the vessel, and make it steerable upon demand, and also retractable when sailing. Naturally it requires an electrical supply, which as I understand it under present technology can come from a combination of battery power and a relatively small DE power plant. This power plant would be located in its own insulated (heat and sound) box up on the flat deck of the catamaran.

So here are a list of questions I have at the moment:
1) Can such a rim-drive propulsor be run continuous without overheating? It is my understanding that the Vetus unit can do that now.
2) Whether it is the Vetus rim-drive, or another electric drive motor, is it possible to operate such a 'DE system' with very little battery supplements?
3) How few batteries are required (in the interest to keep added weight down) ?
4) Is it possible to 'direct drive' this 'electric prop' with the DE power plant, or are batteries required.
5) I realize Vetus has its own DE power plant, but it appears that FisherPanda has an even greater selection of small DE power plants. Can these systems be mixed?
7) Should the Vetus rimdrive prove not powerful enough, what are the other alternatives that anyone would suggest??


As an example of why I might be considering this approach, I will offer this personal experience of mine. I was the original importer to the USA of French catamaran line,... the original model was a 37 foot boat called the Louisiane 37. I placed a 9,9 hp Yamaha 4 stroke Hi-Thrust outboard engine on it. It was a limited production outboard they made with an extra gear reduction in the output prop shaft so it could turn a bigger propeller. It worked pretty good as we got 7 knots out of the vessel in calm conditions. The engine was mounted in the center on a rear beam of the vessel, and soft lines were lead from the engine to the rudder arms so when docking the engine would steer along with the rudders. Maneuverability was VERY good. It made me a believer in 'steerable engine', verses twins,...an alternative to consider.

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If the vessel will ever sail with out power , tow two pails the same diameter as the rim drives overboard to see the speed reduction.

The outboards can at least be lifted free and clear.
 
FAST FRED said:
If the vessel will ever sail with out power , tow two pails the same diameter as the rim drives overboard to see the speed reduction.

The outboards can at least be lifted free and clear.
Click to expand...
the rim drives stay down to recharge the batterys
who cares if I sail at 19kts instead of 20?
 
I have a couple of interesting pdfs on my google drive, you can look them up if you want.

https://drive.google.com/file/d/0B2wb8aKVyyiMeGFTN2JScDFPOTQ/view?usp=drivesdk

https://drive.google.com/file/d/0B2wb8aKVyyiMTzJiSXhOSXdudE0/view?usp=drivesdk




Siemens also makes motors and all the controllers, they use special ZF gearboxes with PTI to mount the pm motors.

https://drive.google.com/file/d/0B2wb8aKVyyiMRmd1U1hRenlYUVk/view?usp=drivesdk




Bosch and Daimler have a company that makes an integrated motor generator between the engine and gearbox, used by Porche and others.

https://drive.google.com/file/d/0B2wb8aKVyyiMckpkU2FrbG5mLXM/view?usp=drivesdk
 
FAST FRED said:
If the vessel will ever sail with out power , tow two pails the same diameter as the rim drives overboard to see the speed reduction.

The outboards can at least be lifted free and clear.
Click to expand...
??
Perhaps you missed this?
brian eiland said:
....
What I have in mind at this moment is how I might adapt this Vetus Rim Drive unit to be my single primary propulsion propeller. I would like to mount it in the aft portion of a of the wingdeck of the vessel, and make it steerable upon demand, and also retractable when sailing.
Click to expand...
 
CatrigCat said:
I have a couple of interesting pdfs on my google drive, you can look them up if you want.
https://drive.google.com/file/d/0B2wb8aKVyyiMeGFTN2JScDFPOTQ/view?usp=drivesdk
https://drive.google.com/file/d/0B2wb8aKVyyiMTzJiSXhOSXdudE0/view?usp=drivesdk

Siemens also makes motors and all the controllers, they use special ZF gearboxes with PTI to mount the pm motors.
https://drive.google.com/file/d/0B2wb8aKVyyiMRmd1U1hRenlYUVk/view?usp=drivesdk

Bosch and Daimler have a company that makes an integrated motor generator between the engine and gearbox, used by Porche and others.
https://drive.google.com/file/d/0B2wb8aKVyyiMckpkU2FrbG5mLXM/view?usp=drivesdk
Click to expand...
Thanks very much for posting those links. I must have been distracted onto other subjects and not given them there due diligence. I will have to go inspect them more thoroughly.

One question that does come to mind is a cooling question. For the rim driven thrusters it is not as much of a problem due to their intermentant usage. But with rim drive propulsion units the cooling problems can be more of a challenge
 
Didnt huisman build a big yacht a few years back with 2 rim drives for propulsion?
A few years of data there.
Edit - S/Y Ethereal
 
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