Joe wrote:
Nice Dink Doug.
Looks allot like a trinka. I'd never deal with the hassles blow up's
provide.


Thanks Joe. I like the Trinka too. I thought about getting
one cheap from a cruiser near us that has one, and using it
for a mold, but he wouldn't turn it loose for a low enough
price. So I designed my own hull.

The basic concept was to develop an elliptical cross-section
that maximized stability for a given beam and minimized
wetted surface for a given displacement. The design program
says it should be about 90% as stable as an inflatable and
have about 1% more rowing drag than a 10' Whitehall (it is
9' LOA). I thought that was a good compromise point!

The planks are really strips of foam core and I am almost
ready to laminate on the carbon fiber. The hull should weigh
around 11# bare. All finished, I figure it'll still weigh
less than 30#.... maybe around 20# which would be great.
Lift it with one hand.

When I get it done, I'll take a picture of it holding up a
truck. Maybe that will convince you of the strength of foam
core & carbon fiber

Fresh Breezes- Doug King

DSK wrote:

When I get it done, I'll take a picture of it holding up a
truck. Maybe that will convince you of the strength of foam
core & carbon fiber

Yeah...I'll post a picture of a set of 5 dollar pressed steel tire
ramps designed to hold a truck up and work under it.

Joe

Fresh Breezes- Doug King

Yeah...I'll post a picture of a set of 5 dollar pressed steel tire
ramps designed to hold a truck up and work under it.


But will they retain that strength after rusting in salt water?

RB
35s5
NY

Joe wrote:
Yeah...I'll post a picture of a set of 5 dollar pressed steel tire
ramps designed to hold a truck up and work under it.


You mean the $5 ones that cost $39.99 at Wal-Mart? They
won't hold up a very big truck. And you can't put 3 people
in them to row ashore from a windy anchorage.

And my dinghy will never rust.

BTW how much do you figure it would cost to make a steel
dinghy? How much do you think it would weigh?

DSK

DSK wrote:
Joe wrote:
Yeah...I'll post a picture of a set of 5 dollar pressed steel tire
ramps designed to hold a truck up and work under it.


You mean the $5 ones that cost $39.99 at Wal-Mart? They
won't hold up a very big truck. And you can't put 3 people
in them to row ashore from a windy anchorage.

And my dinghy will never rust.

BTW how much do you figure it would cost to make a steel
dinghy? How much do you think it would weigh?

DSK

Well if you had acess to the right stamping equipment and dies it could
be done for around 60 dollars a boat due to the high cost of steel. A
proper powder coating or hot zinc coating might cost another 30
dollars, it's not going to be light enough to be blown over and over
empty, it will not be flapping in the wind while being towed, should
come in at a proper 165lbs est.

Tooling up, is the costly part. Needed a 5000 ton stamping unit and
all.

Someone did it in the 30's, a few are still around.

Then again you can round the corners of the hood off a 68 Old's, put a
20 hp merc on it and fly like the wind...30 pounds...10 bucks from a
junk yard. You can park yer truck on it too!

Joe

BTW how much do you figure it would cost to make a steel
dinghy? How much do you think it would weigh?


Joe wrote:
Well if you had acess to the right stamping equipment and dies it could
be done for around 60 dollars a boat due to the high cost of steel. A
proper powder coating or hot zinc coating might cost another 30
dollars, it's not going to be light enough to be blown over and over
empty, it will not be flapping in the wind while being towed, should
come in at a proper 165lbs est.


There are finerglass dinks that heavy. And a lot of RIBs
weigh that much even without the motor.

Tooling up, is the costly part. Needed a 5000 ton stamping unit and
all.

Someone did it in the 30's, a few are still around.


Back in the late 1800s... 1890s maybe... a method of
stamping sheet steel into lifeboats was perfected and they
were the standard for a long time. They were double-bottomed
and unsinkable.

Guess what they make lifeboats out of nowadays?
All together now... F-I-B-E-R-G-L-A-S-S


Then again you can round the corners of the hood off a 68 Old's, put a
20 hp merc on it and fly like the wind...30 pounds...10 bucks from a
junk yard. You can park yer truck on it too!


It'd look great hanging in davits too, especially with the
hood ornament.... **** now ya tell me, I already spent all
that money on foam & epoxy!!

DSK

DSK wrote:
BTW how much do you figure it would cost to make a steel
dinghy? How much do you think it would weigh?


Joe wrote:
Well if you had acess to the right stamping equipment and dies it could
be done for around 60 dollars a boat due to the high cost of steel. A
proper powder coating or hot zinc coating might cost another 30
dollars, it's not going to be light enough to be blown over and over
empty, it will not be flapping in the wind while being towed, should
come in at a proper 165lbs est.


There are finerglass dinks that heavy. And a lot of RIBs
weigh that much even without the motor.

Tooling up, is the costly part. Needed a 5000 ton stamping unit and
all.

Someone did it in the 30's, a few are still around.


Back in the late 1800s... 1890s maybe... a method of
stamping sheet steel into lifeboats was perfected and they
were the standard for a long time. They were double-bottomed
and unsinkable.

Guess what they make lifeboats out of nowadays?
All together now... F-I-B-E-R-G-L-A-S-S


Then again you can round the corners of the hood off a 68 Old's, put a
20 hp merc on it and fly like the wind...30 pounds...10 bucks from a
junk yard. You can park yer truck on it too!


It'd look great hanging in davits too, especially with the
hood ornament.... **** now ya tell me, I already spent all
that money on foam & epoxy!!

How's about this one...pretty sleek
http://www.ringvaart.demon.co.uk/ass...dingy_0203.jpg

I always thought a aluminium tube like they use on party deck boats...
shaped like an inflatable with aluminum bottom would be real cool!.

Joe

DSK

You have an elaborately built round bilge steel yacht and think accordingly.
I have seen Dutch working boats which had steel dinghies made of plate with
chines of course. Looked easy to make but pretty heavy
Edgar

"Joe" wrote in message
ups.com...

DSK wrote:
Joe wrote:
Yeah...I'll post a picture of a set of 5 dollar pressed steel tire
ramps designed to hold a truck up and work under it.


You mean the $5 ones that cost $39.99 at Wal-Mart? They
won't hold up a very big truck. And you can't put 3 people
in them to row ashore from a windy anchorage.

And my dinghy will never rust.

BTW how much do you figure it would cost to make a steel
dinghy? How much do you think it would weigh?

DSK

Well if you had acess to the right stamping equipment and dies it could
be done for around 60 dollars a boat due to the high cost of steel. A
proper powder coating or hot zinc coating might cost another 30
dollars, it's not going to be light enough to be blown over and over
empty, it will not be flapping in the wind while being towed, should
come in at a proper 165lbs est.

Tooling up, is the costly part. Needed a 5000 ton stamping unit and
all.

Someone did it in the 30's, a few are still around.

Then again you can round the corners of the hood off a 68 Old's, put a
20 hp merc on it and fly like the wind...30 pounds...10 bucks from a
junk yard. You can park yer truck on it too!

Joe

How about a dinghy made out of cardboard?

Scotty

"Edgar" wrote in message
...
You have an elaborately built round bilge steel yacht and
think accordingly.
I have seen Dutch working boats which had steel dinghies
made of plate with
chines of course. Looked easy to make but pretty heavy
Edgar

"Joe" wrote in message

ups.com...

DSK wrote:
Joe wrote:
Yeah...I'll post a picture of a set of 5 dollar
pressed steel tire
ramps designed to hold a truck up and work under it.


You mean the $5 ones that cost $39.99 at Wal-Mart?
They
won't hold up a very big truck. And you can't put 3
people
in them to row ashore from a windy anchorage.

And my dinghy will never rust.

BTW how much do you figure it would cost to make a
steel
dinghy? How much do you think it would weigh?

DSK

Well if you had acess to the right stamping equipment
and dies it could
be done for around 60 dollars a boat due to the high
cost of steel. A
proper powder coating or hot zinc coating might cost
another 30
dollars, it's not going to be light enough to be blown
over and over
empty, it will not be flapping in the wind while being
towed, should
come in at a proper 165lbs est.

Tooling up, is the costly part. Needed a 5000 ton
stamping unit and
all.

Someone did it in the 30's, a few are still around.

Then again you can round the corners of the hood off a
68 Old's, put a
20 hp merc on it and fly like the wind...30 pounds...10
bucks from a
junk yard. You can park yer truck on it too!

Joe

http://www.neryc.com/documents/waterlineaug2005.pdf

Pictures on page 6.

--
"j" ganz @@
www.sailnow.com

"Scotty" wrote in message
. ..
How about a dinghy made out of cardboard?

Scotty

"Edgar" wrote in message
...
You have an elaborately built round bilge steel yacht and
think accordingly.
I have seen Dutch working boats which had steel dinghies
made of plate with
chines of course. Looked easy to make but pretty heavy
Edgar

"Joe" wrote in message

ups.com...

DSK wrote:
Joe wrote:
Yeah...I'll post a picture of a set of 5 dollar
pressed steel tire
ramps designed to hold a truck up and work under it.


You mean the $5 ones that cost $39.99 at Wal-Mart?
They
won't hold up a very big truck. And you can't put 3
people
in them to row ashore from a windy anchorage.

And my dinghy will never rust.

BTW how much do you figure it would cost to make a
steel
dinghy? How much do you think it would weigh?

DSK

Well if you had acess to the right stamping equipment
and dies it could
be done for around 60 dollars a boat due to the high
cost of steel. A
proper powder coating or hot zinc coating might cost
another 30
dollars, it's not going to be light enough to be blown
over and over
empty, it will not be flapping in the wind while being
towed, should
come in at a proper 165lbs est.

Tooling up, is the costly part. Needed a 5000 ton
stamping unit and
all.

Someone did it in the 30's, a few are still around.

Then again you can round the corners of the hood off a
68 Old's, put a
20 hp merc on it and fly like the wind...30 pounds...10
bucks from a
junk yard. You can park yer truck on it too!

Joe