"Nav" wrote in message
...


Capt. Neal® wrote:

"Joe" wrote in message
om...

Capt. Neal® wrote in message
...

I read the original post again and it just
says 150 foot mega yacht so it probably is
a mono-hull. I guess I was mixing it up with
Oz's thread about the big catamaran he just
bid on from the Greeks?

You could still build a nice tunnel drive into
the hull just forward of the rudder. That would
be my plan if I were filthy rich and were building
such a yacht. Actually, I think I would experiment
with a tunnel either side of the keel where it
fits to the hull. It would look somewhat like
a couple of jet engine nacelles on the tail
of a Gulfstream like this one
http://www.controller.com/images/con...e/00905032.jpg
but with smaller tunnels recessed into the keel.



And it would be an effective add on. However on something in the 150
yacht it would be a smart move to have a twin screw system. If
properly set up you can walk your stern left or right without any
thruster assitance just using your wheel walk. For a bow thruster a
simple 120 hp electric thruster would suffice in a tunnel. If money
were truley no issue than Id go all diesel electric including both
main screws and go with cort nozzles and variable pitch props able to
feather flat. Everything would sail by wire off a joy stick with
computer sail trimming, touch screen navigation and control thruout
the vessel.
But 150 foot is just so second class in today maga yacht scene. Id
build in the 225 footer range.

Joe



225 feet is about where steel comes into its own. Any smaller
than that and it's just too heavy for spritely performance.

I would go whole hog and have it made from stainless steel.
After all, the premise is you won the lottery and money is
no object.


Stainless steel is not a cure all for corrosion problems -it's also heavy
for a yacht. Aluminum seems a more common solution.

Cheers

What? No Titanium?
Scout

Aluminum is relatively worthless for a boat hull.

All it takes to completely destroy the hull of an
aluminum hulled vessel is a handful of mercury
past smeared on it. It will begin to turn to dust within
hours, break apart and sink.

A stainless steel boat is impervious to just about
anything but strong acids.

CN



"Nav" wrote in message ...


Capt. Neal® wrote:

"Joe" wrote in message om...

Capt. Neal® wrote in message ...

I read the original post again and it just
says 150 foot mega yacht so it probably is
a mono-hull. I guess I was mixing it up with
Oz's thread about the big catamaran he just
bid on from the Greeks?

You could still build a nice tunnel drive into
the hull just forward of the rudder. That would
be my plan if I were filthy rich and were building
such a yacht. Actually, I think I would experiment
with a tunnel either side of the keel where it
fits to the hull. It would look somewhat like
a couple of jet engine nacelles on the tail
of a Gulfstream like this one
http://www.controller.com/images/con...e/00905032.jpg
but with smaller tunnels recessed into the keel.



And it would be an effective add on. However on something in the 150
yacht it would be a smart move to have a twin screw system. If
properly set up you can walk your stern left or right without any
thruster assitance just using your wheel walk. For a bow thruster a
simple 120 hp electric thruster would suffice in a tunnel. If money
were truley no issue than Id go all diesel electric including both
main screws and go with cort nozzles and variable pitch props able to
feather flat. Everything would sail by wire off a joy stick with
computer sail trimming, touch screen navigation and control thruout
the vessel.
But 150 foot is just so second class in today maga yacht scene. Id
build in the 225 footer range.

Joe



225 feet is about where steel comes into its own. Any smaller
than that and it's just too heavy for spritely performance.

I would go whole hog and have it made from stainless steel.
After all, the premise is you won the lottery and money is
no object.


Stainless steel is not a cure all for corrosion problems -it's also
heavy for a yacht. Aluminum seems a more common solution.

Cheers

a rogue tuna?
Scout

"Capt. Neal®" wrote
All it takes to completely destroy the hull of an
aluminum hulled vessel is a handful of mercury
past smeared on it.

Scout wrote:

"Nav" wrote in message
...


Capt. Neal® wrote:


"Joe" wrote in message
e.com...


Capt. Neal® wrote in message
...


I read the original post again and it just
says 150 foot mega yacht so it probably is
a mono-hull. I guess I was mixing it up with
Oz's thread about the big catamaran he just
bid on from the Greeks?

You could still build a nice tunnel drive into
the hull just forward of the rudder. That would
be my plan if I were filthy rich and were building
such a yacht. Actually, I think I would experiment
with a tunnel either side of the keel where it
fits to the hull. It would look somewhat like
a couple of jet engine nacelles on the tail
of a Gulfstream like this one
http://www.controller.com/images/con...e/00905032.jpg
but with smaller tunnels recessed into the keel.



And it would be an effective add on. However on something in the 150
yacht it would be a smart move to have a twin screw system. If
properly set up you can walk your stern left or right without any
thruster assitance just using your wheel walk. For a bow thruster a
simple 120 hp electric thruster would suffice in a tunnel. If money
were truley no issue than Id go all diesel electric including both
main screws and go with cort nozzles and variable pitch props able to
feather flat. Everything would sail by wire off a joy stick with
computer sail trimming, touch screen navigation and control thruout
the vessel.
But 150 foot is just so second class in today maga yacht scene. Id
build in the 225 footer range.

Joe



225 feet is about where steel comes into its own. Any smaller
than that and it's just too heavy for spritely performance.

I would go whole hog and have it made from stainless steel.
After all, the premise is you won the lottery and money is
no object.


Stainless steel is not a cure all for corrosion problems -it's also heavy
for a yacht. Aluminum seems a more common solution.

Cheers


What? No Titanium?

Terrible metal for a yacht -lack of ductility. Gold alloy might be better.

Cheers

"Nav" wrote in message
...


Scout wrote:

"Nav" wrote in message
...


Capt. Neal® wrote:


"Joe" wrote in message
le.com...


Capt. Neal® wrote in message
...


I read the original post again and it just
says 150 foot mega yacht so it probably is
a mono-hull. I guess I was mixing it up with
Oz's thread about the big catamaran he just
bid on from the Greeks?

You could still build a nice tunnel drive into
the hull just forward of the rudder. That would
be my plan if I were filthy rich and were building
such a yacht. Actually, I think I would experiment
with a tunnel either side of the keel where it
fits to the hull. It would look somewhat like
a couple of jet engine nacelles on the tail
of a Gulfstream like this one
http://www.controller.com/images/con...e/00905032.jpg
but with smaller tunnels recessed into the keel.



And it would be an effective add on. However on something in the 150
yacht it would be a smart move to have a twin screw system. If
properly set up you can walk your stern left or right without any
thruster assitance just using your wheel walk. For a bow thruster a
simple 120 hp electric thruster would suffice in a tunnel. If money
were truley no issue than Id go all diesel electric including both
main screws and go with cort nozzles and variable pitch props able to
feather flat. Everything would sail by wire off a joy stick with
computer sail trimming, touch screen navigation and control thruout
the vessel.
But 150 foot is just so second class in today maga yacht scene. Id
build in the 225 footer range.

Joe



225 feet is about where steel comes into its own. Any smaller
than that and it's just too heavy for spritely performance.

I would go whole hog and have it made from stainless steel.
After all, the premise is you won the lottery and money is
no object.


Stainless steel is not a cure all for corrosion problems -it's also heavy
for a yacht. Aluminum seems a more common solution.

Cheers


What? No Titanium?

Terrible metal for a yacht -lack of ductility. Gold alloy might be better.

Cheers

pure gold is too dense?
Scout

A whole school of tuna hitting the hull might do it . . .

CN


"Scout" wrote in message ...
a rogue tuna?
Scout

"Capt. Neal®" wrote
All it takes to completely destroy the hull of an
aluminum hulled vessel is a handful of mercury
past smeared on it.

In article ,
=?Windows-1252?Q?Capt._Neal=AE?= wrote:
A whole school of tuna hitting the hull might do it . . .

CN

In your case, one guppy would sink your boat.

--
Jonathan Ganz (j gan z @ $ail no w.c=o=m)
http://www.sailnow.com
"If there's no wind, row."

Capt. Neal® wrote:

Aluminum is relatively worthless for a boat hull.

All it takes to completely destroy the hull of an
aluminum hulled vessel is a handful of mercury
past smeared on it. It will begin to turn to dust within
hours, break apart and sink.


Hahahha. A handful of mercury?


A stainless steel boat is impervious to just about
anything but strong acids.


How about salt water and time?

Cheers

Scout wrote:

"Nav" wrote in message
...


Scout wrote:


"Nav" wrote in message
...


Capt. Neal® wrote:



"Joe" wrote in message
gle.com...



Capt. Neal® wrote in message
...



I read the original post again and it just
says 150 foot mega yacht so it probably is
a mono-hull. I guess I was mixing it up with
Oz's thread about the big catamaran he just
bid on from the Greeks?

You could still build a nice tunnel drive into
the hull just forward of the rudder. That would
be my plan if I were filthy rich and were building
such a yacht. Actually, I think I would experiment
with a tunnel either side of the keel where it
fits to the hull. It would look somewhat like
a couple of jet engine nacelles on the tail
of a Gulfstream like this one
http://www.controller.com/images/con...e/00905032.jpg
but with smaller tunnels recessed into the keel.



And it would be an effective add on. However on something in the 150
yacht it would be a smart move to have a twin screw system. If
properly set up you can walk your stern left or right without any
thruster assitance just using your wheel walk. For a bow thruster a
simple 120 hp electric thruster would suffice in a tunnel. If money
were truley no issue than Id go all diesel electric including both
main screws and go with cort nozzles and variable pitch props able to
feather flat. Everything would sail by wire off a joy stick with
computer sail trimming, touch screen navigation and control thruout
the vessel.
But 150 foot is just so second class in today maga yacht scene. Id
build in the 225 footer range.

Joe



225 feet is about where steel comes into its own. Any smaller
than that and it's just too heavy for spritely performance.

I would go whole hog and have it made from stainless steel.
After all, the premise is you won the lottery and money is
no object.


Stainless steel is not a cure all for corrosion problems -it's also heavy
for a yacht. Aluminum seems a more common solution.

Cheers


What? No Titanium?

Terrible metal for a yacht -lack of ductility. Gold alloy might be better.

Cheers


pure gold is too dense?
Scout

Too soft.

Cheers

I said mercury paste. Mercury at room temp is a liquid and
difficult to hold in the palm of one's hand while mercury
paste is similar to paste wax and can be held and smeared
on by hand.


"Nav" wrote in message ...


Capt. Neal® wrote:

Aluminum is relatively worthless for a boat hull.

All it takes to completely destroy the hull of an
aluminum hulled vessel is a handful of mercury
past smeared on it. It will begin to turn to dust within
hours, break apart and sink.


Hahahha. A handful of mercury?


A stainless steel boat is impervious to just about
anything but strong acids.


How about salt water and time?

Cheers