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DSK DSK is offline
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First recorded activity by BoatBanter: Jul 2006
Posts: 1,419
Default Useless propeller

| ... 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?


|
| 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?


.... 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....

A DUCK!!






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.'

DSK