Which is how/why she could do 44kts(50mph), which is
pretty much hauling ass for anything that size in the
water.


Zz Yzx wrote:

http://www.popularmechanics.com/tech...78.html?page=2

On Mar 10, 4:01*pm, Pat Barber wrote:
Which is how/why she could do 44kts(50mph), which is
pretty much hauling ass for anything that size in the
water.



Zz Yzx wrote:
http://www.popularmechanics.com/tech...on/4263478.htm....

Funny thing is, that she would probably do 42 kts with 50,000 HP and
the next 2 knots would take 3 times as much. Such is the rule of
displacement vessels. To take that one theoretical step further, if
they wanted to go 46 knots, they's need 400,000 HP. 47kt 1 million. 50
kts a bezllion HP

Robatoy wrote:
On Mar 10, 4:01 pm, Pat Barber wrote:
Which is how/why she could do 44kts(50mph), which is
pretty much hauling ass for anything that size in the
water.



Zz Yzx wrote:
http://www.popularmechanics.com/tech...on/4263478.htm...

Funny thing is, that she would probably do 42 kts with 50,000 HP and
the next 2 knots would take 3 times as much. Such is the rule of
displacement vessels. To take that one theoretical step further, if
they wanted to go 46 knots, they's need 400,000 HP. 47kt 1 million. 50
kts a bezllion HP

I think 55 knots or so is the theoretical maximum a vessel can move through
the water, irrespective of the power pushing it.

As the speed increases, the vessel begins to outrun its bow wave. It then
has to ride over the bow wave or push through it. The faster the vessel, the
bigger the bow wave.

Sort of like the increase in mass with velocity and, as the velocity
approaches the speed of light, the mass becomes infinite. Only not exactly.

On Mar 10, 9:31*pm, "HeyBub" wrote:
Robatoy wrote:
On Mar 10, 4:01 pm, Pat Barber wrote:
Which is how/why she could do 44kts(50mph), which is
pretty much hauling ass for anything that size in the
water.

Zz Yzx wrote:
http://www.popularmechanics.com/tech...on/4263478.htm....

Funny thing is, that she would probably do 42 kts with 50,000 HP and
the next 2 knots would take 3 times as much. Such is the rule of
displacement vessels. To take that one theoretical step further, if
they wanted to go 46 knots, they's need 400,000 HP. 47kt 1 million. 50
kts a bezllion HP

I think 55 knots or so is the theoretical maximum a vessel can move through
the water, irrespective of the power pushing it.

As the speed increases, the vessel begins to outrun its bow wave. It then
has to ride over the bow wave or push through it. The faster the vessel, the
bigger the bow wave.

Sort of like the increase in mass with velocity and, as the velocity
approaches the speed of light, the mass becomes infinite. Only not exactly.

Not exactly indeed.

The maximum speed of a displacement vessel is determined by its
length. The longer, the faster.... with the same power.

In article ,
HeyBub wrote:
Robatoy wrote:
On Mar 10, 4:01 pm, Pat Barber wrote:
Which is how/why she could do 44kts(50mph), which is
pretty much hauling ass for anything that size in the
water.



Zz Yzx wrote:
http://www.popularmechanics.com/tech...on/4263478.htm...

Funny thing is, that she would probably do 42 kts with 50,000 HP and
the next 2 knots would take 3 times as much. Such is the rule of
displacement vessels. To take that one theoretical step further, if
they wanted to go 46 knots, they's need 400,000 HP. 47kt 1 million. 50
kts a bezllion HP

I think 55 knots or so is the theoretical maximum a vessel can move through
the water, irrespective of the power pushing it.

Nope. not even close

Currently, unlimited power-boat races are in the 160MPH range. in years past,
they got up into the 200 MPH range, but engine/fuel restrictions have brought
the speeds down.

'Cigarette' boats can reach 80+knots in calm water.

Some torpedoes -- which travel entirely underwater -- have sustained speeds
well over 100 knots.

Robert Bonomi wrote:
In article ,
HeyBub wrote:
Robatoy wrote:
On Mar 10, 4:01 pm, Pat Barber wrote:
Which is how/why she could do 44kts(50mph), which is
pretty much hauling ass for anything that size in the
water.



Zz Yzx wrote:
http://www.popularmechanics.com/tech...on/4263478.htm...
Funny thing is, that she would probably do 42 kts with 50,000 HP and
the next 2 knots would take 3 times as much. Such is the rule of
displacement vessels. To take that one theoretical step further, if
they wanted to go 46 knots, they's need 400,000 HP. 47kt 1 million. 50
kts a bezllion HP
I think 55 knots or so is the theoretical maximum a vessel can move through
the water, irrespective of the power pushing it.

Nope. not even close

Currently, unlimited power-boat races are in the 160MPH range. in years past,
they got up into the 200 MPH range, but engine/fuel restrictions have brought
the speeds down.

'Cigarette' boats can reach 80+knots in calm water.

Some torpedoes -- which travel entirely underwater -- have sustained speeds
well over 100 knots.

unlimiteds aren't displacement boats, they're hydroplanes. Cigarette
boats are also on plane at speed and therefore not displacement vessels.
My physicist buddy that does torpedo testing says max speed for a
conventional torpedo is 55 knots, but supercavitating torpedoes are
capable of much higher speeds by essentially traveling in a gas bubble
and are therefore also not technically [water] displacement devices.

In article ,
Doug Winterburn wrote:

My physicist buddy that does torpedo testing says max speed for a
conventional torpedo is 55 knots, but supercavitating torpedoes are
capable of much higher speeds by essentially traveling in a gas bubble
and are therefore also not technically [water] displacement devices.

I'll simply suggest that _something_ is moving the water out of the way,
be it the torpedo body or the 'gas bubble'. Else an elementary fact
of physics is being violated. *OR* somebody has managed to implement
the tunnel diode at a macro scale. grin

On 3/10/2010 10:39 PM, Doug Winterburn wrote:
Robert Bonomi wrote:
In ,
wrote:
Robatoy wrote:
On Mar 10, 4:01 pm, Pat wrote:
Which is how/why she could do 44kts(50mph), which is
pretty much hauling ass for anything that size in the
water.



Zz Yzx wrote:
http://www.popularmechanics.com/tech...on/4263478.htm...
Funny thing is, that she would probably do 42 kts with 50,000 HP and
the next 2 knots would take 3 times as much. Such is the rule of
displacement vessels. To take that one theoretical step further, if
they wanted to go 46 knots, they's need 400,000 HP. 47kt 1 million. 50
kts a bezllion HP
I think 55 knots or so is the theoretical maximum a vessel can move through
the water, irrespective of the power pushing it.

Nope. not even close

Currently, unlimited power-boat races are in the 160MPH range. in years past,
they got up into the 200 MPH range, but engine/fuel restrictions have brought
the speeds down.

'Cigarette' boats can reach 80+knots in calm water.

Some torpedoes -- which travel entirely underwater -- have sustained speeds
well over 100 knots.

unlimiteds aren't displacement boats, they're hydroplanes. Cigarette
boats are also on plane at speed and therefore not displacement vessels.
My physicist buddy that does torpedo testing says max speed for a
conventional torpedo is 55 knots, but supercavitating torpedoes are
capable of much higher speeds by essentially traveling in a gas bubble
and are therefore also not technically [water] displacement devices.

Your physicist buddy is playing word games. The torpedo is going so
fast that flow detaches from its surface at the transition from the nose
cone to the body. But it is most assuredly travelling in water.

In any case the British seem to be laboring under the misconception that
their Spearfish torpedo can exceed 60 knots. Perhaps he should call
them and inform them of their error.

On Wed, 10 Mar 2010 20:39:38 -0700, the infamous Doug Winterburn
scrawled the following:

Robert Bonomi wrote:
In article ,
HeyBub wrote:
Robatoy wrote:
On Mar 10, 4:01 pm, Pat Barber wrote:
Which is how/why she could do 44kts(50mph), which is
pretty much hauling ass for anything that size in the
water.



Zz Yzx wrote:
http://www.popularmechanics.com/tech...on/4263478.htm...
Funny thing is, that she would probably do 42 kts with 50,000 HP and
the next 2 knots would take 3 times as much. Such is the rule of
displacement vessels. To take that one theoretical step further, if
they wanted to go 46 knots, they's need 400,000 HP. 47kt 1 million. 50
kts a bezllion HP
I think 55 knots or so is the theoretical maximum a vessel can move through
the water, irrespective of the power pushing it.

Nope. not even close

Currently, unlimited power-boat races are in the 160MPH range. in years past,
they got up into the 200 MPH range, but engine/fuel restrictions have brought
the speeds down.

'Cigarette' boats can reach 80+knots in calm water.

Some torpedoes -- which travel entirely underwater -- have sustained speeds
well over 100 knots.

unlimiteds aren't displacement boats, they're hydroplanes. Cigarette
boats are also on plane at speed and therefore not displacement vessels.

I can't wait to see the next hydroplaning aircraft carrier!


My physicist buddy that does torpedo testing says max speed for a
conventional torpedo is 55 knots, but supercavitating torpedoes are
capable of much higher speeds by essentially traveling in a gas bubble
and are therefore also not technically [water] displacement devices.

http://www.answerbag.com/q_view/7151 233mph torpedo.

--
There is no such thing as limits to growth, because there are no limits
to the human capacity for intelligence, imagination, and wonder.
-- Ronald Reagan

"Robert Bonomi" wrote:

'Cigarette' boats can reach 80+knots in calm water.

'Cigarette' boats AKA: Bathtub toys.

I used to have to listen to there bull crap about how 'Cigarette'
boats were "Blue Water" boats.

Used to **** off those guys no end when they would schedule a race
then have to stay tied up at dock when a front would come thru the
night before and they couldn't handle the 4-6 ft chop with 15-20 knots
of wind that resulted.

I'd hang a 110 jib, tuck a reef in the main and go out and play.

Gawd did that **** them off.

I just grinned and got a cold one.

Lew

On Mar 10, 10:45*pm, "Lew Hodgett" wrote:
"Robert Bonomi" wrote:
'Cigarette' boats can reach 80+knots in calm water.

'Cigarette' boats AKA: Bathtub toys.

I used to have to listen to there bull crap about how 'Cigarette'
boats were "Blue Water" boats.

Used to **** off those guys no end when they would schedule a race
then have to stay tied up at dock when a front would come thru the
night before and they couldn't handle the 4-6 ft chop with 15-20 knots
of wind that resulted.

I'd hang a 110 jib, tuck a reef in the main and go out and play.

Gawd did that **** them off.

I just grinned and got a cold one.

Lew

15-20 knots and 6-ft chop wouldn't even get my old Hoby 16 airborne. I
miss that thing, but I couldn't take the pounding at this age.

On Wed, 10 Mar 2010 16:01:09 -0500, the infamous Pat Barber
scrawled the following:

Which is how/why she could do 44kts(50mph), which is
pretty much hauling ass for anything that size in the
water.

If you thought that was a sharp bow profile (which I feel is pretty
much standard for destroyers and other navy ships) check this out:
http://tinyurl.com/yeurjz6 The HSV-2 Swift, a 323-foot U.S. Navy
high-speed vessel with a real knife-edge bow and outriggers.

I wonder how much wood they burn in her boilers. (lame attempt to
bring it back on topic)

--
There is no such thing as limits to growth, because there are no limits
to the human capacity for intelligence, imagination, and wonder.
-- Ronald Reagan