Why not settle for a high performance sailboat that has it all. Now If I
had $2,000,000.00 I'd buy it in a heart beat.
http://www.distancia.de/

Jack
"Glenn Ashmore" wrote in message
news:JDPqb.10756$62.1728@lakeread04...
I don't think it is quite ready for prime time yet but here is an
interesting idea. A small retractable Voith-Schneider drive like those
used on modern tugs. Retracts flat into the hull and when extended will
deliver thrust in any direction. http://www.spw-gmbh.de/en/hb/

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

Why not settle for a high performance sailboat that has it all. Now If I
had $2,000,000.00 I'd buy it in a heart beat.
http://www.distancia.de/

Jack
"Glenn Ashmore" wrote in message
news:JDPqb.10756$62.1728@lakeread04...
I don't think it is quite ready for prime time yet but here is an
interesting idea. A small retractable Voith-Schneider drive like those
used on modern tugs. Retracts flat into the hull and when extended will
deliver thrust in any direction. http://www.spw-gmbh.de/en/hb/

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

Why not settle for a high performance sailboat that has it all. Now If I
had $2,000,000.00 I'd buy it in a heart beat.
http://www.distancia.de/

Jack
"Glenn Ashmore" wrote in message
news:JDPqb.10756$62.1728@lakeread04...
I don't think it is quite ready for prime time yet but here is an
interesting idea. A small retractable Voith-Schneider drive like those
used on modern tugs. Retracts flat into the hull and when extended will
deliver thrust in any direction. http://www.spw-gmbh.de/en/hb/

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

10500 hours of brain-work, and they haven`t figured that they could have all
that, with less complication at a fraction of the price-----------with a
multihull! ;-)))
Bob
Jack Rye wrote:
Why not settle for a high performance sailboat that has it all. Now
If I had $2,000,000.00 I'd buy it in a heart beat.
http://www.distancia.de/

Jack
"Glenn Ashmore" wrote in message
news:JDPqb.10756$62.1728@lakeread04...
I don't think it is quite ready for prime time yet but here is an

10500 hours of brain-work, and they haven`t figured that they could have all
that, with less complication at a fraction of the price-----------with a
multihull! ;-)))
Bob
Jack Rye wrote:
Why not settle for a high performance sailboat that has it all. Now
If I had $2,000,000.00 I'd buy it in a heart beat.
http://www.distancia.de/

Jack
"Glenn Ashmore" wrote in message
news:JDPqb.10756$62.1728@lakeread04...
I don't think it is quite ready for prime time yet but here is an

Thanks Jim,
That explanation makes a bit of sense, need to see the pictures to
understand better though.
I've ordered the Corlett book from my library, looking forward to reading
it.
Ray

"Jim Woodward" jameslwoodward at attbi dot com wrote in message
...
I don't know Alabama at all, but perhaps I can shed some light:

Great Britain (first iron screw steamship, launched in Bristol, 1843, now
back in Bristol, see http://www.ss-great-britain.com/) was refitted in
1857
for the Australian trade, which required that she sail well. To
accomplish
this she had a lifting screw. Perhaps Glenn should consider this for Rutu
instead of a MaxProp.

Take a propeller with a stub shaft, fore and aft. Put bearings on both
ends and a square on the forward end. Hang the bearings on a frame that
can
be lifted straight up in channels.

In order to raise the propeller for sailing, you:
1) remove a short section of shaft inside the vessel.
2) slide the tailshaft forward
3) raise the frame with tackle.

To operate under power, it's the reverse, except that when sliding the
tailshaft aft, you have to engage the square on the stub shaft in a hollow
on the end of the tailshaft.

That's how it's described in the text of The Story of Brunel's SS Great
Britain, Ewan Corlett, Conway Maritime, 1990. However, a drawing by Basil
Greenhill in the same book shows a dog clutch rather than the square.

The Great Britain museum is a wonderful view into the first large ocean
going screw vessel -- it's a great story, as she was rescued from the
Falkland Islands where she rusted from 1886 until 1970.


--
Jim Woodward
www.mvFintry.com


.
"BF" wrote in message
...
"Glenn Ashmore" wrote in message
news:ghSqb.10765$62.10532@lakeread04...


Jim Woodward wrote:

Interesting. It's amazing to watch a vessel equipped with a VS
drive --
they really can go in any direction with full thrust.

I'd worry about efficiency -- the end plate is a larger problem in a
small
one than in a large one, a VS is not as efficient as a propeller,
and
you'd
probably have to go diesel electric or diesel hydraulic in order to
retract
it, and both are lossy.

Do you know what it costs?

That's why I said it was not ready for prime time. It would be fun to
dock though. Especially with a retractable bow thruster. A pas de
bouree up to the end of the pier and with a quick piorette and a short
petit jete you are into your slip. (Tutus and leotards optional)

The web site said to contact about prices and if it were objectionable
they would let you know when the production gets above 10 in a batch.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or
lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com


Changing the subject totally:
Raphael Semmes, in his account of the CSS Alabama, mentions on several
occasions of fitting the propeller (maybe he used the word screw, not
sure)
before making steam.
Anyone have a clue what he meant.
Did they actually remove the screw and shaft when sailing. If so, how,
without stopping and sending divers down, which they obviously didn't
do.
Or did they simply disengage the screw from the drive shaft so it free
wheeled, and then needed to reattach, perhaps lacking a clutching means?
Or did the shaft pivot on a u-joint near the packing gland and could be
pivoted so the screw was above the water line?
Anyone know or have other ideas?
Anyone else care?
Ray
(btw, I will definitely try Duke's in Ridgeway this Spring when in
Charleston, hope a good thing isn't being spoiled here. Can you say
Wreck)

Thanks Jim,
That explanation makes a bit of sense, need to see the pictures to
understand better though.
I've ordered the Corlett book from my library, looking forward to reading
it.
Ray

"Jim Woodward" jameslwoodward at attbi dot com wrote in message
...
I don't know Alabama at all, but perhaps I can shed some light:

Great Britain (first iron screw steamship, launched in Bristol, 1843, now
back in Bristol, see http://www.ss-great-britain.com/) was refitted in
1857
for the Australian trade, which required that she sail well. To
accomplish
this she had a lifting screw. Perhaps Glenn should consider this for Rutu
instead of a MaxProp.

Take a propeller with a stub shaft, fore and aft. Put bearings on both
ends and a square on the forward end. Hang the bearings on a frame that
can
be lifted straight up in channels.

In order to raise the propeller for sailing, you:
1) remove a short section of shaft inside the vessel.
2) slide the tailshaft forward
3) raise the frame with tackle.

To operate under power, it's the reverse, except that when sliding the
tailshaft aft, you have to engage the square on the stub shaft in a hollow
on the end of the tailshaft.

That's how it's described in the text of The Story of Brunel's SS Great
Britain, Ewan Corlett, Conway Maritime, 1990. However, a drawing by Basil
Greenhill in the same book shows a dog clutch rather than the square.

The Great Britain museum is a wonderful view into the first large ocean
going screw vessel -- it's a great story, as she was rescued from the
Falkland Islands where she rusted from 1886 until 1970.


--
Jim Woodward
www.mvFintry.com


.
"BF" wrote in message
...
"Glenn Ashmore" wrote in message
news:ghSqb.10765$62.10532@lakeread04...


Jim Woodward wrote:

Interesting. It's amazing to watch a vessel equipped with a VS
drive --
they really can go in any direction with full thrust.

I'd worry about efficiency -- the end plate is a larger problem in a
small
one than in a large one, a VS is not as efficient as a propeller,
and
you'd
probably have to go diesel electric or diesel hydraulic in order to
retract
it, and both are lossy.

Do you know what it costs?

That's why I said it was not ready for prime time. It would be fun to
dock though. Especially with a retractable bow thruster. A pas de
bouree up to the end of the pier and with a quick piorette and a short
petit jete you are into your slip. (Tutus and leotards optional)

The web site said to contact about prices and if it were objectionable
they would let you know when the production gets above 10 in a batch.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or
lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com


Changing the subject totally:
Raphael Semmes, in his account of the CSS Alabama, mentions on several
occasions of fitting the propeller (maybe he used the word screw, not
sure)
before making steam.
Anyone have a clue what he meant.
Did they actually remove the screw and shaft when sailing. If so, how,
without stopping and sending divers down, which they obviously didn't
do.
Or did they simply disengage the screw from the drive shaft so it free
wheeled, and then needed to reattach, perhaps lacking a clutching means?
Or did the shaft pivot on a u-joint near the packing gland and could be
pivoted so the screw was above the water line?
Anyone know or have other ideas?
Anyone else care?
Ray
(btw, I will definitely try Duke's in Ridgeway this Spring when in
Charleston, hope a good thing isn't being spoiled here. Can you say
Wreck)

I'm glad you're not buying the book for just this -- the explanation is not
much more than what I said and the drawing says something different. The
book is interesting in many different ways, but it's often frustrating,
because of careless editing....

I saw a full size repro of the thing at Bristol, so I have an advantage.
They've restored the actual ship to her original, fixed, propeller.


--
Jim Woodward
www.mvFintry.com


..
"BF" wrote in message
...
Thanks Jim,
That explanation makes a bit of sense, need to see the pictures to
understand better though.
I've ordered the Corlett book from my library, looking forward to reading
it.
Ray

"Jim Woodward" jameslwoodward at attbi dot com wrote in message
...
I don't know Alabama at all, but perhaps I can shed some light:

Great Britain (first iron screw steamship, launched in Bristol, 1843,
now
back in Bristol, see http://www.ss-great-britain.com/) was refitted in
1857
for the Australian trade, which required that she sail well. To
accomplish
this she had a lifting screw. Perhaps Glenn should consider this for
Rutu
instead of a MaxProp.

Take a propeller with a stub shaft, fore and aft. Put bearings on both
ends and a square on the forward end. Hang the bearings on a frame that
can
be lifted straight up in channels.

In order to raise the propeller for sailing, you:
1) remove a short section of shaft inside the vessel.
2) slide the tailshaft forward
3) raise the frame with tackle.

To operate under power, it's the reverse, except that when sliding the
tailshaft aft, you have to engage the square on the stub shaft in a
hollow
on the end of the tailshaft.

That's how it's described in the text of The Story of Brunel's SS Great
Britain, Ewan Corlett, Conway Maritime, 1990. However, a drawing by
Basil
Greenhill in the same book shows a dog clutch rather than the square.

The Great Britain museum is a wonderful view into the first large ocean
going screw vessel -- it's a great story, as she was rescued from the
Falkland Islands where she rusted from 1886 until 1970.


--
Jim Woodward
www.mvFintry.com


.
"BF" wrote in message
...
"Glenn Ashmore" wrote in message
news:ghSqb.10765$62.10532@lakeread04...


Jim Woodward wrote:

Interesting. It's amazing to watch a vessel equipped with a VS
drive --
they really can go in any direction with full thrust.

I'd worry about efficiency -- the end plate is a larger problem in
a
small
one than in a large one, a VS is not as efficient as a propeller,
and
you'd
probably have to go diesel electric or diesel hydraulic in order
to
retract
it, and both are lossy.

Do you know what it costs?

That's why I said it was not ready for prime time. It would be fun
to
dock though. Especially with a retractable bow thruster. A pas de
bouree up to the end of the pier and with a quick piorette and a
short
petit jete you are into your slip. (Tutus and leotards optional)

The web site said to contact about prices and if it were
objectionable
they would let you know when the production gets above 10 in a
batch.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or
lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com


Changing the subject totally:
Raphael Semmes, in his account of the CSS Alabama, mentions on several
occasions of fitting the propeller (maybe he used the word screw, not
sure)
before making steam.
Anyone have a clue what he meant.
Did they actually remove the screw and shaft when sailing. If so, how,
without stopping and sending divers down, which they obviously didn't
do.
Or did they simply disengage the screw from the drive shaft so it free
wheeled, and then needed to reattach, perhaps lacking a clutching
means?
Or did the shaft pivot on a u-joint near the packing gland and could
be
pivoted so the screw was above the water line?
Anyone know or have other ideas?
Anyone else care?
Ray
(btw, I will definitely try Duke's in Ridgeway this Spring when in
Charleston, hope a good thing isn't being spoiled here. Can you say
Wreck)

I'm glad you're not buying the book for just this -- the explanation is not
much more than what I said and the drawing says something different. The
book is interesting in many different ways, but it's often frustrating,
because of careless editing....

I saw a full size repro of the thing at Bristol, so I have an advantage.
They've restored the actual ship to her original, fixed, propeller.


--
Jim Woodward
www.mvFintry.com


..
"BF" wrote in message
...
Thanks Jim,
That explanation makes a bit of sense, need to see the pictures to
understand better though.
I've ordered the Corlett book from my library, looking forward to reading
it.
Ray

"Jim Woodward" jameslwoodward at attbi dot com wrote in message
...
I don't know Alabama at all, but perhaps I can shed some light:

Great Britain (first iron screw steamship, launched in Bristol, 1843,
now
back in Bristol, see http://www.ss-great-britain.com/) was refitted in
1857
for the Australian trade, which required that she sail well. To
accomplish
this she had a lifting screw. Perhaps Glenn should consider this for
Rutu
instead of a MaxProp.

Take a propeller with a stub shaft, fore and aft. Put bearings on both
ends and a square on the forward end. Hang the bearings on a frame that
can
be lifted straight up in channels.

In order to raise the propeller for sailing, you:
1) remove a short section of shaft inside the vessel.
2) slide the tailshaft forward
3) raise the frame with tackle.

To operate under power, it's the reverse, except that when sliding the
tailshaft aft, you have to engage the square on the stub shaft in a
hollow
on the end of the tailshaft.

That's how it's described in the text of The Story of Brunel's SS Great
Britain, Ewan Corlett, Conway Maritime, 1990. However, a drawing by
Basil
Greenhill in the same book shows a dog clutch rather than the square.

The Great Britain museum is a wonderful view into the first large ocean
going screw vessel -- it's a great story, as she was rescued from the
Falkland Islands where she rusted from 1886 until 1970.


--
Jim Woodward
www.mvFintry.com


.
"BF" wrote in message
...
"Glenn Ashmore" wrote in message
news:ghSqb.10765$62.10532@lakeread04...


Jim Woodward wrote:

Interesting. It's amazing to watch a vessel equipped with a VS
drive --
they really can go in any direction with full thrust.

I'd worry about efficiency -- the end plate is a larger problem in
a
small
one than in a large one, a VS is not as efficient as a propeller,
and
you'd
probably have to go diesel electric or diesel hydraulic in order
to
retract
it, and both are lossy.

Do you know what it costs?

That's why I said it was not ready for prime time. It would be fun
to
dock though. Especially with a retractable bow thruster. A pas de
bouree up to the end of the pier and with a quick piorette and a
short
petit jete you are into your slip. (Tutus and leotards optional)

The web site said to contact about prices and if it were
objectionable
they would let you know when the production gets above 10 in a
batch.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or
lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com


Changing the subject totally:
Raphael Semmes, in his account of the CSS Alabama, mentions on several
occasions of fitting the propeller (maybe he used the word screw, not
sure)
before making steam.
Anyone have a clue what he meant.
Did they actually remove the screw and shaft when sailing. If so, how,
without stopping and sending divers down, which they obviously didn't
do.
Or did they simply disengage the screw from the drive shaft so it free
wheeled, and then needed to reattach, perhaps lacking a clutching
means?
Or did the shaft pivot on a u-joint near the packing gland and could
be
pivoted so the screw was above the water line?
Anyone know or have other ideas?
Anyone else care?
Ray
(btw, I will definitely try Duke's in Ridgeway this Spring when in
Charleston, hope a good thing isn't being spoiled here. Can you say
Wreck)

"Glenn Ashmore" wrote in message
news:JDPqb.10756$62.1728@lakeread04...
I don't think it is quite ready for prime time yet but here is an
interesting idea. A small retractable Voith-Schneider drive like those
used on modern tugs. Retracts flat into the hull and when extended will
deliver thrust in any direction. http://www.spw-gmbh.de/en/hb/

Wow. I'm not a great fan of VS drives ('cause they have lower efficiency
than ducted props) and they are hideously expensive. I'm surprised he has
got around the VS patents!

The new Volvo 70 rule allows for retractable propulsion systems - using a
Volvo engine and shaft drive. Not sure how designers will make this work
but it will be interesting to see if can trickle down to more mainstream
designs. Now I want to sit down with a sketch pad and start thinking about
this!!


--
Evan Gatehouse

you'll have to rewrite my email address to get to me
ceilydh AT 3web dot net
(fools the spammers)