boats faster on fresh water or salt
Dawn Howell
Salt water gives more lift an freah water has less drag
Will my boat go faster in salt water or fresh
macl...@webtv.net
Earl Bollinger
in Fresh.
Unless the moon is directly overhead, that'll cause a slight gravity
change
making your boat faster in salt water than in fresh. That's why we have
tides in the oceans
but not in fresh water lakes.
Tony Thomas
be sligtly faster due to more boyancy and the boat riding higher. But the
increase in drag over what surface is wet will slow you back down.
Bottom line, probably not a detectable difference unless you have something
that will read accurately to at least a 1/10th of a MPH
Tony Thomas
My speed boats at http://members.home.net/thomastl1
"Dawn Howell" <mmd...@webtv.net> wrote in message
news:6349-39...@storefull-254.iap.bryant.webtv.net...
BillS
surface and less drag. You'll go faster on a low tide in salt water than a
high tide ;-)
BillS.
Earl Bollinger wrote:
> Salt water has a higher density that fresh water, thus you'd be faster
> in Fresh.
> Unless the moon is directly overhead, that'll cause a slight gravity
> change
> making your boat faster in salt water than in fresh. That's why we have
> tides in the oceans
> but not in fresh water lakes.
>
> Dawn Howell wrote:
> >
fine...@my-deja.com
BillS <billSPAMMEN...@tivoli.com> wrote:
> When the tide is out, the water level is lower so you have less wetted
> surface and less drag. You'll go faster on a low tide in salt water
than a high tide ;-)
I thought that was only on the outgoing tide, when the water is rushing
away from your boat's bottom? ;-)
>
> Earl Bollinger wrote:
>
> > Salt water has a higher density that fresh water, thus you'd be
faster
> > in Fresh.
> > Unless the moon is directly overhead, that'll cause a slight gravity
> > change
> > making your boat faster in salt water than in fresh. That's why we
have
> > tides in the oceans
> > but not in fresh water lakes.
> >
> > Dawn Howell wrote:
> > >
> > > Ive heard both ends of of the argument
> > > Salt water gives more lift an freah water has less drag
> > > Will my boat go faster in salt water or fresh
> > > macl...@webtv.net
>
>
Sent via Deja.com http://www.deja.com/
Before you buy.
Larry W4CSC
Howell) wrote:
>Ive heard both ends of of the argument
>Salt water gives more lift an freah water has less drag
>Will my boat go faster in salt water or fresh
>macl...@webtv.net
>
It'll go lots faster in salt water. Salt water has lots less "No
Wake" zones.....(c;
larry
Ed
Howell) wrote:
>Ive heard both ends of of the argument
>Salt water gives more lift an freah water has less drag
>Will my boat go faster in salt water or fresh
>macl...@webtv.net
I've always wondered about this as my last boat used to run a couple
miles per hour faster, measured by GPS, in Florida than it would here
in Atlanta. About 51-52 on Lanier, 53-54 on the ICW. I have no idea
why....could it be the altitude change? Atmosphere? Affects of SA on
the GPS?
A mystery that may never be solved.....
-Ed G
Earl Bollinger
the longitude points get,
thus you don't have to travel as far between the longitude points.
You get really fast up by the arctic zone.
Waterlou4
That's the only answer in this thread that really makes sense. The others are
interesting from a scientific point of view, but what's all the fuss about an
extra one or two MPH?
bajaman
Many freshwater lakes, especially those far inland, are at varying
altitudes. You lose something like 3 percent of your engine's horsepower
for every one thousand feet of elevation, if I remember correctly.
So.......same boat will be MUCH faster do to more horsepower in the ocean as
opposed to a lake in Colorado......unless it is using a supercharger.
"Dawn Howell" <mmd...@webtv.net> wrote in message
news:6349-39...@storefull-254.iap.bryant.webtv.net...
Tom Raynor
>the longitude points get,
>thus you don't have to travel as far between the longitude points.
That's why travelling up or down the coast on a long trip with the in-laws
seems so much slower (at middle lattitudes) than travelling East to your
favorite off-shore fishing spot with your buddies ;)
Gould 0738
>So.......same boat will be MUCH faster do to more horsepower in the ocean as
>opposed to a lake in Colorado......unless it is using a supercharger.
As a member of the gnit gleaner's union, I couldn't let such a statement go
unchallenged.
If the same boat, with the same supercharger, is operated at both sea level
and on a Colorado lake, won't it still run better at zero altitude? Your
statement seems to imply that the supercharger is more effective in the
mountains that at sea level.
________
Chuck Gould
Float and let float.
S.Jeffrey
I sail small semi-floater and sinker windsurfing boards (9'4" 115 ltrs. and 8'6"
~85 ltrs.). It is much easier to plane in saltwater (and uphaul the
semi-floater) in marginal conditions than in freshwater. Got to be the lift
provided by the greater density in saltwater.
Roe
bajaman wrote:
> Typically boats are "faster" in salt water because you are at sea level.
> Many freshwater lakes, especially those far inland, are at varying
> altitudes. You lose something like 3 percent of your engine's horsepower
> for every one thousand feet of elevation, if I remember correctly
> So.......same boat will be MUCH faster do to more horsepower in the ocean as
> opposed to a lake in Colorado......unless it is using a supercharger.
JAXAshby
>
>>So.......same boat will be MUCH faster do to more horsepower in the ocean as
>>opposed to a lake in Colorado......unless it is using a supercharger.
>
>unchallenged.
>
>If the same boat, with the same supercharger, is operated at both sea level
>and on a Colorado lake, won't it still run better at zero altitude? Your
>statement seems to imply that the supercharger is more effective in the
>mountains that at sea level.
>
>________
>Chuck Gould
>
A turbo-charged piston powered aircraft developing 100% of rated horsepower
will go faster at 18,000 ft (50% of air density gone) than at 0 ft.
A normally aspired aircarft going full throttle at sea level will go faster
than the same aircraft going full throttle at 7500 ft (with about 75% of air
density still available).
The reason an aircraft goes faster for the same hp at greater altitude is
simple, the air is thinner. The reason a full throttle aircraft goes faster at
sea level is because the engine developes more hp because the air is thicker.
Ignore "flat rated" engines.
If anyone doubts this, ask anyone with a valid pilot's license.
bajaman
would operate the same regardless of altitude/air density. But then I
thought of how various intercoolers can make a difference........
What's a "gnit"?
"Gould 0738" <goul...@aol.comspamkill> wrote in message
news:20000922095231...@ng-cb1.aol.com...
> Bajaman wrote:
>
> >So.......same boat will be MUCH faster do to more horsepower in the ocean
as
> >opposed to a lake in Colorado......unless it is using a supercharger.
>
> As a member of the gnit gleaner's union, I couldn't let such a statement
go
> unchallenged.
>
> If the same boat, with the same supercharger, is operated at both sea
level
> and on a Colorado lake, won't it still run better at zero altitude? Your
> statement seems to imply that the supercharger is more effective in the
> mountains that at sea level.
>
> ________
> Chuck Gould
>
> Float and let float.
Ed
>Typically boats are "faster" in salt water because you are at sea level.
>Many freshwater lakes, especially those far inland, are at varying
>altitudes. You lose something like 3 percent of your engine's horsepower
>for every one thousand feet of elevation, if I remember correctly.
>So.......same boat will be MUCH faster do to more horsepower in the ocean as
>opposed to a lake in Colorado......unless it is using a supercharger.
>"Dawn Howell" <mmd...@webtv.net> wrote in message
>news:6349-39...@storefull-254.iap.bryant.webtv.net...
>> Ive heard both ends of of the argument
>> Salt water gives more lift an freah water has less drag
>> Will my boat go faster in salt water or fresh
>> macl...@webtv.net
>>
>
Hmmm.....Lake Lanier is about 1071 at full pool. Florida? 0. So
figuring 3% loss of HP/1000ft, assuming the 250 rated is accurate at
sea level leaves us with about 242.5 HP. Would that account for a
2mph differnece? Co-incidentally, top speed was about 3% lower as
well. (3% of 53 is 1.06).
This is as close an explanation as I have heard yet......
-Ed G
Waterlou4
It's a nit (as in "nitpicker"), a/k/a "cootie" or "head louse."
When documentary filmmakers started covering gnu migrations, they moved to a
gneisser gneighborhood and changed their name to "wildebeest."
That left room in the old neighborhood for "nits" to move up to "gnits".
Or, it could be that that old member of the gnit gleaner's union, our own Chuck
Gould, either can't type or can't spell. He's in good company, according to
the old saying "Pall Mall can't spall."
It's raining in Baltimore, there are small craft warnings on the Bay, and I'm
bored.
Waterlou4
That's also why my @#$%&* plastic chart plotter works fine on latitude, but has
no markings I can line up with longitude.
hkr...@capu.net
Speaking of disconnects...
--
Harry Krause
------------
In the wilderness is the preservation of the world
Gould 0738
Well, a "nit" is a louse.
But a gnit is not. A knit is not. Or knot.
"Gnit" is a sort of lint. It escapes from knit.
It tends to collect in the belly buttons of beautiful women (only) and requires
delicate removal. This is far more engrossing than picking nits, which would,
indeed, be a lousy job.
Gnit gleaners had to form a union. There was substantial competition for the
handful of positions available, and a free market for
gnit gleaning services would have deflated wages accordingly.
Gnit gleaning is far easier in salt water than in fresh, and can be
accomplished much faster, as the navels tend to float slightly higher above the
surface in the denser water. Gnit that has been in place long enough to become
permanently engrained in the BWBB (beautiful woman's belly button) can often be
scraped loose after the liberal use of navel jelly.