Any mathematicians out there..
Power boat range?
A Motor sailer may be more feasible. The battery weight could act as ballast..the sails as solar collectors..
Range for sea-vessels is pretty much impossible to put to numbers, too many variables. Sea moves and winds affect movement. If you get to sea current range is couple of thousand miles. Or around the world if you use sails as well. Can use it all in couple of miles too if you just floor it.
IOW, you need to be more specific. What kind of boat and how do you use it?
A 36-40-foot Picnic Boat, Hinckley or Bunker & Ellis, used inshore around Maine and Florida. I have had some chats with boat builders here in Maine this summer since I received my P85. Would love the Tesla quiet in a power boat!!
At this point I have to say that I have no clue about power requirements of moving such a vehicle. Others might have some insights. I'm curious too to find out how Tesla drivetrain would perform in boats too (I have considered buying a small boat to cruise to my parents home which is about 800km using water ways. Don't care if it takes a lot longer than going by car, I love sea).
In 1898, Tesla demonstrated a radio-controlled boat (U.S. Patent 613,809 —Method of an Apparatus for Controlling Mechanism of Moving Vehicle or Vehicles).
A boat is the solution to develop for a practical autopilot... that's less risk for the beginning of the technology in my opinion.
The only place i can find number (still missing specifics) is from Goldfish 23 foot tender boat from Norway that is using a ReGen 145KW brushless electric motor. According to the Press Release it was getting just shy of 2 regular miles per KWH (45nm = 52 regular miles range with 27kwh).
Also a little context about the press release reported last year
Catamarans are somewhat like the teslas of the ocean, in effect old technology which has been modernized as a result of high fuel prices. Imagine a tesla powered catamaran coupled with solar sails and solar cells incorperated into the boats structure. Wind assisted by electricity...Id buy one..
As an example, a derivative of the pentone motor (patent US 5794601) with telsa motor could be a solution.
Our neighbor (next boat over at the marina) has a 38' sailboat with electric drive provided by:
It has a 10 kW motor (18 kW peak) which is about 13 HP. His system was installed with a Li Ion battery pack, 10 kWh if I remember correctly. Seems underpowered for a boat that size since in is replacing a 38 HP diesel, but the owner says he can cruise as 4 knots easily and faster when necessary. Certainly enough to get in and out off the marina. The owner has used it with a range extender generator for longer distances.
Gunboats, probably the most efficient high tech passenger Catamarans out there use a hybrid engine on their newer series of boats. Of course, the price tag for one of these carbon fiber beauties will set you back a few million dollars, but, as far as I know, this is the most efficient sailboat that I know about, obviously excluding racing boats.
18KW Electric propulsion motors with regeneration (x2)
1KW Solar system mounted on pilothouse
23KWH Lithium ion battery bank
I think a catamaran is likely to be the best design with or without a sail. The ballast of the regular sailboat does have some logic to it too though. Streamlined hull is the key - regular powerboats and speed boats aren't very power efficient as far as I know.
But for a fast power boat, take the America's cup catamaran/yachts, on hydrofoils, and put a larger electric motor and remove the sale, and things get very interesting.
I assume you can slow-charge your boat in its pen? Otherwise get a mooring in a strong current area and set the propeller to regen the battery.
Powerboat can be power efficient once it gets to high speed: it starts to glide in surface instead of cutting thru water.
Of course catamaran can do that same, but the efficiency difference is negligible at that point (and can be reversed). Stability OTOH is one that catamaran is clearly ahead of single hull boats.
That boat in movie waterworld combined sailboat and some sort of windmill in a way that actually looked practical (even that actual movie was crap). I wonder how well that kind of system could actually work in RL boats. Would require a bit engineering magic to get that to work, but I don't think it's impossible task to do.
My Hinckley had a 440 HP Yanmar Diesel engine, connected to a Hamilton waterjet drive. Some newer Hinckley Picnic Boats have twin Volvo 250 HP Diesel engines. BTW, can anyone tell me how much the A/C induction motor weighs in the Model S?
@ Timo, check this out: http://www.planetsolar.org/
Its 100% solar powered boat, made out of carbon fiber. It took this boat almost two years to go around the world, this is because it had to travel through mostly sunny areas. This does prove though that were you to tether-charge a boat like a Tesla, you could probably have a very efficient and quiet power boat.
Solar is not very practical here. I would rather put something like this: http://www.quietrevolution.com/qr5/qr5-turbine.htm in the boat. (doesn't have to be just that, that just was first one I found from net). Omni-directionality saves the trouble of turning into wind and wind is more reliable than solar at least in here.
There are solar charged battery powered boats already. People are working on it, and I doubt that Tesla would start building boats because they are trying to make a positive impact on the environment whilst running a business. Too few boats (when compared to cars), but as I said, there are people working on this type of stuff and they have had some remarkable accomplishments already.
Not interested in solar; plug-in, with twin 416 hp Tesla motors connected to Hamilton water-jet drives. Want to cruise around 18 knots, top speed around 28. What might range be in a 35' to 40' boat weighing around 15,000 pounds, planing hull.
With close to 300 patents tesla could turn the boating industry upside down..I wouldn't be surprised if they allowed there tech to be used in a field they "most likely" have no intentions of entering..perhaps the government could give them carbon credits in exchange.....
Detoit is the city of motor and the government could give something if that change the world... San Francisco could build an operating system for the boating industry.
Interesting electric boat concept here:
I could see a bigger boat appealing to a much broader audience.
I could also see the boat selling for a similar price as a tesla and being less complicated to build. Perhaps we're just waiting until the Model X arrives so we have something to pull it in and out of the water with.
I am looking for the Tesla yacht that will surpass the efficiency of the Greenline Hybrids. Tesla built the best car in the world. Mission is working on the best motorcycle (with Tesla technology). I am looking for the best Yacht now in 2014.
@Timo: A Waterworld mention! It did feature clever mechanisms.