have blue
 

JAXAshby wrote:
oh, you mean horsepower can not be compared to watts?

Gee, the European engine manufacturers do it all the time. somebody should
tell them you can't do that.

No, I mean this:

"6 amps at 12 volts for 24 hours = 1,728 watts, which = 2.3 hp-hours."

Amps times Volts times hours = Watt-hrs, a unit of energy
Horspower times hours= hp-hrs, a unit of energy
Watts are units of power
Horsepower is a unit of power (who would of thought it?)

Energy and power are two different things, which you well know.

Cheers
Marty

have blue
 

Being a little sloppy with the units is not that bad - his real blunder is
claiming 72 Watts output. The Condor catamaran claims 22 Amps at 144 Volts, or
over 3 kW output when regenerating in a good breeze. They generate enough
sailing during the day to power in and out of their inlet.


"Martin Baxter" wrote in message
...
JAXAshby wrote:
oh, you mean horsepower can not be compared to watts?

Gee, the European engine manufacturers do it all the time. somebody should
tell them you can't do that.

No, I mean this:

"6 amps at 12 volts for 24 hours = 1,728 watts, which = 2.3 hp-hours."

Amps times Volts times hours = Watt-hrs, a unit of energy
Horspower times hours= hp-hrs, a unit of energy
Watts are units of power
Horsepower is a unit of power (who would of thought it?)

Energy and power are two different things, which you well know.

Cheers
Marty

have blue
 

ah, I forgot about Perpetual Motion drives. Thanks for reminding me.

However, using electric motors that can regenerate through the propeller is
viable and is being done today.

no, it isn't.

Ahh yep it is Jocks.
http://solomontechnologies.com/Solom...allations.html




Oz1...of the 3 twins.

I welcome you to crackerbox palace,We've been expecting you.

have blue
 

Jeff Morris wrote:
Being a little sloppy with the units is not that bad - his real blunder is
claiming 72 Watts output. The Condor catamaran claims 22 Amps at 144 Volts, or
over 3 kW output when regenerating in a good breeze. They generate enough
sailing during the day to power in and out of their inlet.


I'm still pretty skeptical, 3 kW is neary 5 Hp, allowing for some losses
it's going to be equivalent to stapping a 5 horse outboard to your bow
and run it full throttle trying to push the boat back. This might have
a significant impact on performance, speed wise, no?

Cheers
Marty

have blue
 

jon, I have been hearing that very same story regarding fuel cells since I was
in junior high school in the 50's.

let's see when they arrive on the market.

hey're getting competitive quickly. Another few years and
it'll make sense for most boats to go this way. Fossil fuels
are a stupid solution.

"JAXAshby" wrote in message
...
Costs are going to get competitive over time

sure they are. in the 25th century, or by the 29th century for sure, if
not by
the year 4,000.

Even when you include a
small genset for the "diesel-electric" approach there's a big win in the
long
term "total cost of investment."

*if* total cost of investment means total cost of investment the breakeven
point may never be reached.

but keep hoping and praying.

have blue
 

joony, do you have stock in yet another fuel cell company?

Go away. You're stupid and boring.

"JAXAshby" wrote in message
...
But the elect. motor/gen. sounds ideal if the costs
could be competitive.

AND if you are willing to sail for 173 days straight just to motor less
than a
day. (see prior post).

have blue
 

didn't make it to fuel cells at this point, though it has been "nearly here"
for a couple decades.

If it works so extremely well for heavy, small volume welding bottle tanks why
hasn't it caught in the much more profitable market of fuel cells?

Excactly, as for 'honeycomb', I believe you're thinking of metal hydride
storage,
as is used for acetylene bottles, I think it's a well proven technology.

Cheers
Marty

have blue
 

oh, I see why you didn't understand. you didn't know that watts = hp. such a
pity.

Also you seem unable to comprehend that ~750 watts put into a battery bank for
one hour gives back ~hp per hour, less inefficiencies.

don't worry, just go with the flow.

oh, you mean horsepower can not be compared to watts?

Gee, the European engine manufacturers do it all the time. somebody should
tell them you can't do that.

No, I mean this:

"6 amps at 12 volts for 24 hours = 1,728 watts, which = 2.3 hp-hours."

Amps times Volts times hours = Watt-hrs, a unit of energy
Horspower times hours= hp-hrs, a unit of energy
Watts are units of power
Horsepower is a unit of power (who would of thought it?)

Energy and power are two different things, which you well know.

Cheers
Marty

have blue
 

let's see. 22 amps at 144 (sic) volts when sailing 18 knots, for about 4 hp
stored per hour times 8 hours gives about 32 hp hours.

yup, that works. you sailed 144 miles and now you're going to motor back using
1 hp and you are going to do it in just 32 hours (actually about 20 hours after
taking out ineffiencies).

Being a little sloppy with the units is not that bad - his real blunder is
claiming 72 Watts output. The Condor catamaran claims 22 Amps at 144 Volts,
or
over 3 kW output when regenerating in a good breeze. They generate enough
sailing during the day to power in and out of their inlet.


"Martin Baxter" wrote in message
...
JAXAshby wrote:
oh, you mean horsepower can not be compared to watts?

Gee, the European engine manufacturers do it all the time. somebody
should
tell them you can't do that.

No, I mean this:

"6 amps at 12 volts for 24 hours = 1,728 watts, which = 2.3 hp-hours."

Amps times Volts times hours = Watt-hrs, a unit of energy
Horspower times hours= hp-hrs, a unit of energy
Watts are units of power
Horsepower is a unit of power (who would of thought it?)

Energy and power are two different things, which you well know.

Cheers
Marty

have blue
 

The was with a 47 foot, 20,000 pound catamaran doing over 9 knots in a 20+
breeze, with two of the 12hp electric wheels. Your mileage may vary.


"Martin Baxter" wrote in message
...
Jeff Morris wrote:
Being a little sloppy with the units is not that bad - his real blunder is
claiming 72 Watts output. The Condor catamaran claims 22 Amps at 144 Volts,
or
over 3 kW output when regenerating in a good breeze. They generate enough
sailing during the day to power in and out of their inlet.


I'm still pretty skeptical, 3 kW is neary 5 Hp, allowing for some losses
it's going to be equivalent to stapping a 5 horse outboard to your bow
and run it full throttle trying to push the boat back. This might have
a significant impact on performance, speed wise, no?

Cheers
Marty