boats?

[sam111]

I am wondering if a boat that runs on a non-engine like an electric motor are available or at least a hybrid exist.
Or why one can't create it.

Other then a small trolling motor I don't see anything for an inboard

 

[smokeonthewater]

Re: boats?

http://forums.iboats.com/boat-topic...topics/electric-outboard-thoughts-626566.html

 

[Mason78]

Re: boats?

They exist, but are not yet practical for most applications in terms of cost or range.

Check out the thread that smokeonthewater linked, it has plenty of info/opinions.

 

[Ned L]

Re: boats?

Anyone remember "Elco"? ...... They were 're-incarnated' quite a few years ago. Electric Boats | Electric Launch | Elco Boats

 

[southkogs]

Re: boats?

Can I interest you in a sail boat?

 

[agallant80]

Re: boats?

Home - SJ Koch Duffy Electric Boat Rentals and Sales

 

[sam111]

Re: boats?

so how long have these been out (i.e the electric motor based boats)
And how many different makers/models are currently in existences as well as how many hps do they get up to. I am doubting they have yet made a carnival cruises sizes one to power a cruise liner completely from a motor. Just curious

Also For airplanes/aircraft vehicles is there any electric motor ones. Or are they still engine based for choppers/planes (I know this part of my question is a little out there but just throwing it out there for anybody that has the experience of both boat and aircrafts )

 

[smokeonthewater]

Re: boats?

you can't carry enough battery power on a planing boat or an airplane for a distance anywhere comparable to a combustion engine..... the battery technology doesn't exist

 

[UncleWillie]

Re: boats?

A boat or auto can support the extra weight because it is supported by the water or the wheels.
An aircraft must support all weight by using more power unless it is a Lighter than Air balloon (Dirigible).

The Gas Turbine (Jet) engine common in large aircraft is much Less efficient than the equivalent Piston engine.
Its saving factor is that it is extremely light weight compared to a piston engine.
Imagine a 747 aircraft with 4, 50,000Hp Piston engines, Would it ever leave the ground?

Electric Motors including batteries tend to be even heavier.
And batteries do not get lighter over time like a gas tanks does.

Electric Radio controlled aircraft do not have anywhere near the duration of a gas model. Very quiet though!

 

[Home Cookin']

Re: boats?

There are electric boats in Europe; one of my neighbors has one. About 20', seats maybe 10, goes real slow, cost a fortune. What a waste.

And there are submarines; in fact the shipyard in Groton is called the Electric Boat Yard. But they carry a diesel generator they run when they surface to recharge them at sea--at least they did in all the WWII movies.

And there are steamboats, a few still around as novelties. They were good for exploring remote areas like Deepest Africa or crossing the ocean where the gas stations were few and far between.

And sailboats, as suggested.

 

[smokeonthewater]

Re: boats?

A non planing boat or auto can support the extra weight because it is supported by the water or the wheels.
An aircraft or a planing boat must support all weight by using more power unless it is a Lighter than Air balloon (Dirigible).

The Gas Turbine (Jet) engine common in large aircraft is much Less efficient than the equivalent Piston engine.
Its saving factor is that it is extremely light weight compared to a piston engine.
Imagine a 747 aircraft with 4, 50,000Hp Piston engines, Would it ever leave the ground?

Electric Motors including batteries tend to be even heavier.
And batteries do not get lighter over time like a gas tanks does.

Electric Radio controlled aircraft do not have anywhere near the duration of a gas model. Very quiet though!

fixed it

Although you are right in a sense....
Actually electric R/C planes can have pretty good duration that compares well with the COMMON duration of gas or nitro planes but only because generally R/C stuff isn't designed for long flights.... My E planes range from 15-30 minute flights but only because I don't want to stare up at the sky any longer without a break and because a stupid light plane is more fun to fly while doing maneuvers that would shatter an airframe and kill a human pilot in a real plane..... over an hour would be easily attained but the insane flight capabilities I enjoy like hovering and insane G force stuff would become very similar to those of a real plane ... Gasoline R/C planes COULD easily carry enough fuel to fly for days if they were built that way tho.... Couldn't do that with an eplane.


whatever we do lets not get off topic LOL

 

[sam111]

Re: boats?

: boats?



you can't carry enough battery power on a planing boat or an airplane for a distance anywhere comparable to a combustion engine..... the battery technology doesn't exist

No but you could generate it be the magneto on the propellors that generate spark for the spark plug (and in the event of the air craft loseing electricity the spark will still fire and the engine will still run)
Are you telling me one can't make a capacitor storage device to store the electricity that is relatively light weight as the magneto generates it. ( this will probably get into the perpetual motion problem or some kind of variant of the second law of thermodynamics.

Later just wanted to see if there was something that currently exited that was motor based for aircrafts now I know it is either piston based or turbine engine based (turbojet ...etc)

Thanks have a good day

 

[kungpaoshizi]

Re: boats?

I prefer coal burning outboards

 

[smokeonthewater]

Re: boats?

No but you could generate it be the magneto on the propellors that generate spark for the spark plug (and in the event of the air craft loseing electricity the spark will still fire and the engine will still run)
Are you telling me one can't make a capacitor storage device to store the electricity that is relatively light weight as the magneto generates it. ( this will probably get into the perpetual motion problem or some kind of variant of the second law of thermodynamics.

Later just wanted to see if there was something that currently exited that was motor based for aircrafts now I know it is either piston based or turbine engine based (turbojet ...etc)

Thanks have a good day

Huh?

 

[rallyart]

Re: boats?

Boesch 710 Costa Brava De Luxe Electric Power - Boesch Boats
Aptera co-founder launches hybrid electric wake boat
Epic Boats introduces all-electric wakeboard craft

They are all much more expensive and have much shorter range than the gasoline variants. Boats are under constant high load while moving so there is no regenerative opportunity. A 150 hp engine is the same power as a 112,000 Watt electric engine. Run that for an hour and you start to see how big the extension cord or battery pack would have to be.

 

[Bondo]

Re: boats?

so how long have these been out (i.e the electric motor based boats)
And how many different makers/models are currently in existences as well as how many hps do they get up to. I am doubting they have yet made a carnival cruises sizes one to power a cruise liner completely from a motor. Just curious

Also For airplanes/aircraft vehicles is there any electric motor ones. Or are they still engine based for choppers/planes (I know this part of my question is a little out there but just throwing it out there for anybody that has the experience of both boat and aircrafts )

Ayuh,.... Actually many big ships Are electrically powered,.... Just like freight Trains,....

Diesel Electric,...

 

[UncleWillie]

Re: boats?

No but you could generate it be the magneto on the propellers that generate spark for the spark plug (and in the event of the air craft loosing electricity the spark will still fire and the engine will still run)
Are you telling me one can't make a capacitor storage device to store the electricity that is relatively light weight as the magneto generates it. ( this will probably get into the perpetual motion problem or some kind of variant of the second law of thermodynamics.

Later just wanted to see if there was something that currently exited that was motor based for aircrafts now I know it is either piston based or turbine engine based (turbojet ...etc)

Thanks have a good day

The electricity to generate the spark ultimately comes from the alternator.
Attaching an alternator back to the electric motor that turns the alternator is Perpetual Motion, pie in the sky, imaginary science.
People will try to explain it by saying the 12 volt motor is running off of a 14 volt alternator and so has power to spare.
But Voltage is not power! Power is Watts, or HorsePower, or Ft-Lbs/Sec. or Volt-Amps (VA) but not Volts OR Amps.

A 70 amp alternator produces ~1000 watts but uses ~1100+ watts in the process.
A motor that produces 1100 watts output needs ~1200+ watts input to do it.
But the alternator is only making 1000 watts and the whole system slowly grinds to a halt.
It is Always about the Power!

 

[jkust]

Re: boats?

Maybe three or four years ago Boating Magazine feature a production electric bowrider type boat. It was nice but to me the downsides of electric are too much given you just can't pull over ignoring the expensive price tag.

 

[haulnazz15]

Re: boats?

BTW, the benefit of turbines isn't mainly in weight savings, it's in the high-altitude performance that they are chosen in high-altitude aircraft. Once you get in the 10,000+ (and really 20,000+) that turbines see huge efficiency gains over the piston-engine counterparts. The ability to compress the thin air at altitude is an advantage that nothing but turbo-charged piston aircraft can do. The efficiency of a propeller is also greatly affected by altitude, which further exacerbates the piston-engine problem.

All-electric propulsion for planing boats/aircraft is nothing but a pipe dream for the time being outside of very short duration exercises. The battery tech just hasn't advanced far enough to see weight-savings or high enough energy densities.

 

[Knot Waiting]

Re: boats?

No but you could generate it be the magneto on the propellors that generate spark for the spark plug (and in the event of the air craft loseing electricity the spark will still fire and the engine will still run)
Are you telling me one can't make a capacitor storage device to store the electricity that is relatively light weight as the magneto generates it. ( this will probably get into the perpetual motion problem or some kind of variant of the second law of thermodynamics.

Later just wanted to see if there was something that currently exited that was motor based for aircrafts now I know it is either piston based or turbine engine based (turbojet ...etc)

Thanks have a good day

Ummm...... what? That's asking for a perpetual motion machine, impossible. The energy required to power any of these devices greatly exceeds the energy its motion can create/capture. The capacitor you refer to is basically a battery, and they are heavy.

Internal combustion is very efficient and with catalytic converters, direct injection, variable valve timing, etc being installed leaves a very small carbon footprint. Especially when compared to the disaster created by battery manufacturing and the production of electricity required to charge batteries.