"DSK" wrote in message .. .
| | ... I say any prop
| | that boils water is useless as a prop
| |
| | If that were all it did, then you'd be totally correct.
| | However, under the specific circumstances, any propellor
| | will boil water.
|
| Paladin wrote:
| The specific circumstances would have to be enough electricity
| running through the prop to heat it up like the element in an
| electric water heater.
|
|
| Is electricity the only thing in the universe which will
| produce heat?
No but it's the only thing on earth I know of that has the ability to cause a propeller attached
to a yacht to boil water.
|
| |
| | When people who live in the mountains make their tea and/or
| | coffee, do they boil their water or does the lower
| | atmospheric pressure mean that they are "vaporizing" it?
|
|
| Paladin wrote:
| They are adding heat only so they are boiling it.
|
| What about the energy expended in carrying it up the
| mountainside?
What if it came down the mountain stream? Your question
and mine are equally nonsensical as neither are part of
the equation.
|
|
| .... The lower
| atmospheric pressure only means they are able to boil water
| usling fewer BTUs because the boiling point temp is lowered.
|
|
| Hmm... and heat is energy... so therefor, if a propellor
| adds energy to the water, and by doing so lowers the
| pressure enough that the boiling point temp is lowered....
Boiling temp. There's that boil word again. You're still guilty
of using a word that means to add heat. You can combine it
with another word but that doesn't change the meaning of
the word boil. As I argued with Gilligan, and he finally concurred,
a propeller does not add enough heat to the water to boil it. It
only lowers pressure in some cases enough to vaporize water and
cause cavitation, so to say a propeller boils water is just plain wrong
according to the definition of the verb "to boil".
|
| They cannot! The definition of the verb "to boil" precludes it.
|
|
| Read it again! You're missing something, just like you
| missed something in the two earlier examples I gave.
|
| BTW I can think of a simple test to prove you are or are not
| the CraptonŽ. Explain, in your own words, the term 'hull speed.'
For a displacement boat, a heavy deep-keel boat, the maximum speed a given hull can attain from wind power is called "hull speed"
and is largely dependent on the waterline length of the boat. Hull speed is expressed as 1.34 X the square root of LWL, or length of
waterline. If a cruising sailboat has a waterline length of 36 feet, she should be able to sail 1.34 x 6, or approximately eight
knots.
http://www.sailnet.com/collections/a...leid=colgat006
Paladin
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