Monday, May 22, 2017

Re: [Electric Boats] Re: Kits for larger sailboats

 

The Electroprop Voyager was designed to be the ultimate electric drive.   The Voyager is powered by a 12 inch double stator, permanent magnet motor with up to 94% efficiency.   Power is transferred through a planetary gearbox.    The Voyager can run up to 5,000 rpm at 96 volts.   


It is capable of 21 KW continuous at 96 volts, 15.5 KW continuous at 72 volts.   

The Voyager is water cooled, with water cooled motor, thrust plate, and controller plate.   Heat is dissipated through an onboard radiator.   There is a magnetically coupled pump.    All water cooled fittings and plates are aluminum.    There are two fans, one pushing air in, and one extracting air out of the enclosure.    

The Voyager can be cooled with a heat exchanger, but we prefer to cool with a radiator so we don't get involved with the grounding of the boat.    

Current order times are between 3 and 6 months.   This is a custom built unit.

All of our systems are now sold as Powertrains, inclusive of energy systems for longer battery life.   

Get more power and longer range with the efficiency of an Electroprop.    

Thanks,  


James   










James Lambden
The Electric Propeller Company
625C East Haley Street,
Santa Barbara, CA
93103

805 455 8444

james@electroprop.com

www.electroprop.com

On May 21, 2017, at 12:37 PM, 'gnhbus@aol.com' GNHBus@aol.com [electricboats] wrote:

 

Electroprop

Sent from my Verizon LG Smartphone

------ Original message------
From: mike@electricyachtssocal.com [electricboats]
Date: Sun, May 21, 2017 11:38 AM
Cc:
Subject:[Electric Boats] Re: Kits for larger sailboats

 

I am not sure what sailboat you are considering buying butthere are three companies that i know of that appear to drive a boat in the48ft 30000lbs range up to hull speed.  I will point out that a 48ft boat at30000lbs.  Weevaluate a system dry weight numbers and not the fully l oaded numbersunderstanding that the sailing weight is greater.


System Speed & Power (LOA 48ft, LWL40ft, beam 14ft,Displacement dry 30000lbs(loaded likely 15% more))                       

Kts          Watts

2.6          960

3.8          1920

4.6          3840

5.1          5760

5.9          7680 Recommend a 10kW genset for thiscontinuous speed

6.5          10560 Recommend a 15kW genset for this continuousspeed

7.1          14400

7.8          19200 This is what a 20kW system would provide

8.4          23040 hull speed reached at about 24kW

Hull speed          8.47       

&n bsp;

Dedicated Marine system (kits not evaluated)

Bell Marine has the 30kW system at 144v liquid cooled (peakis 43kW continuous is likely the 30kW) reduction gear, I believe it is an acinduction motor and I would estimate 350lbs. can be placed in series


Elco has the E70 is a 108v system peak 51.5kW and continuous29kW air cooled direct drive induction ac motor system, 650lbs (number ofinstallation unknown – I also believe you can get it as a 94v system at lesspower)

Electric Yacht QuietTorque 40.0 96v air cooled dual powerheads peak 38.4continuous 32.6kW, PMAC motor system. 155lbs (over 20 installations of boatover 25000lbs dry) - most of the larger installations are 48v QuietTorque 20.0systems.  Can be placed in series

Please add to this list as I suspect there are otherespecially from Europe of similar size.

Mike

Electric Yachts of Southern California/Pacific




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