Anybody know of any all aluminum designs (no wood composite or sandwich)
available for sale for a shallow draft semi tunnel for river running? I can
modify if need be, but I ain't gonna put no wood in it if I build it. Well,
maybe for totally non structural stuff, but I doubt it.

I'm trying to talk Mrs Santa into getting me a 60% duty cycle MIG w/ spool
gun for Christmas.


--
Bob La Londe
Fishing Arizona & The Colorado River
Fishing Forums & Contests
http://www.YumaBassMan.com







--
Posted via a free Usenet account from http://www.teranews.com

On Tue, 27 Nov 2007 20:54:32 -0700, "Bob La Londe"
wrote:

Anybody know of any all aluminum designs (no wood composite or sandwich)
available for sale for a shallow draft semi tunnel for river running? I can
modify if need be, but I ain't gonna put no wood in it if I build it. Well,
maybe for totally non structural stuff, but I doubt it.

I'm trying to talk Mrs Santa into getting me a 60% duty cycle MIG w/ spool
gun for Christmas.


--
Bob La Londe

Uh-oh: you said "aluminum boat" and "MIG welder" really, really,
casually.
Tell me you have MIG welded aluminum before - that you have the right
mask screen, that you can not only stitch thick aluminum castings
together, but you have seamed sheet as well.....

Brian W

On Thu, 29 Nov 2007 19:18:59 -0600, Brian Whatcott
wrote:

Uh-oh: you said "aluminum boat" and "MIG welder" really, really,
casually.
Tell me you have MIG welded aluminum before - that you have the right
mask screen, that you can not only stitch thick aluminum castings
together, but you have seamed sheet as well....

Place I do my boating has lots of fifty year old aluminum boats, none
of which have ever had paint or maintainance of any kind. All are
riveted. Grumman canoes are riveted and they get bounced off the rocks
regularly, if they are used in white water. I don't think welding is
really suitable for anything under forty feet. Metal is too thin. Note
that all those airliners are riveted.

Casady

Any plywood design can be modified for aluminum. You need a design that
will be OK with some weight, as 1/8 aluminum weighs about the same as 3/4
ply. even 1/8 can be a bear to work with, I wouldn't be optimistic for the
chances of success with any thing lighter, unless you have a LOT of
experience.

I'm not sure what you mean by "semi tunnel" but I built an Atkin Rescue
Minor with fully protected prop and rudder. Or you can modify the transom
of any skiff to give you a bit of a tunnel effect with an outboard - at the
loss of some "lift".

Can you provide a link to pictures of the kind of boat (in wood or glass)
you are thinking of?

Sal's Dad


"Bob La Londe" wrote in message
.. .
Anybody know of any all aluminum designs (no wood composite or sandwich)
available for sale for a shallow draft semi tunnel for river running? I
can modify if need be, but I ain't gonna put no wood in it if I build it.
Well, maybe for totally non structural stuff, but I doubt it.

I'm trying to talk Mrs Santa into getting me a 60% duty cycle MIG w/ spool
gun for Christmas.


--
Bob La Londe
Fishing Arizona & The Colorado River
Fishing Forums & Contests
http://www.YumaBassMan.com

On Wed, 5 Dec 2007 07:41:59 -0500, "Sal's Dad"
wrote:

as 1/8 aluminum weighs about the same as 3/4
ply.

If you divide 2.7, the density of aluminum, by 6, you get .45. I
thought plywood was heavier than that.

Casady

Richard Casady wrote:
On Wed, 5 Dec 2007 07:41:59 -0500, "Sal's Dad"
wrote:


as 1/8 aluminum weighs about the same as 3/4
ply.


If you divide 2.7, the density of aluminum, by 6, you get .45. I
thought plywood was heavier than that.

Casady


plywood floats.

Aluminum don't.

What am I missing here?

On Thu, 06 Dec 2007 18:32:10 -0600, cavelamb himself
wrote:

Richard Casady wrote:
On Wed, 5 Dec 2007 07:41:59 -0500, "Sal's Dad"
wrote:


as 1/8 aluminum weighs about the same as 3/4
ply.


If you divide 2.7, the density of aluminum, by 6, you get .45. I
thought plywood was heavier than that.

Casady


plywood floats.

Aluminum don't.

What am I missing here?

A clue.

Casady

Richard Casady wrote:

On Thu, 06 Dec 2007 18:32:10 -0600, cavelamb himself
wrote:


Richard Casady wrote:

On Wed, 5 Dec 2007 07:41:59 -0500, "Sal's Dad"
wrote:



as 1/8 aluminum weighs about the same as 3/4
ply.


If you divide 2.7, the density of aluminum, by 6, you get .45. I
thought plywood was heavier than that.

Casady


plywood floats.

Aluminum don't.

What am I missing here?


A clue.

Casady


I thought most aluminum alloys weighed in at .1 pound per cubic inch.
Except 6061 which is only .09 lbs/cu.in.

Ply was .025 to .033 lbs/cu.in.

So clue me in.

On Thu, 06 Dec 2007 19:29:19 -0600, cavelamb himself
wrote:

Richard Casady wrote:

On Thu, 06 Dec 2007 18:32:10 -0600, cavelamb himself
wrote:


Richard Casady wrote:

On Wed, 5 Dec 2007 07:41:59 -0500, "Sal's Dad"
wrote:



as 1/8 aluminum weighs about the same as 3/4
ply.


If you divide 2.7, the density of aluminum, by 6, you get .45. I
thought plywood was heavier than that.

Casady


plywood floats.

Aluminum don't.

What am I missing here?


A clue.

Casady


I thought most aluminum alloys weighed in at .1 pound per cubic inch.
Except 6061 which is only .09 lbs/cu.in.

Ply was .025 to .033 lbs/cu.in.

So clue me in.

I simply questioned if aluminum was in fact exactly six times as dense
as plywood. That is what you get with sheets six times as thick
weighing the same. That would make the density of plywood .017.lb/cu.
According to you it isn't. I simply opined that most plywood does not
have that particular density. What don't you understand? And I am
sorry about the cheap shot. It isn't really my style. I have the
'calculator that takes no prisoners',HP-48, and it isn't a problem but
it is usual to express wood density as pounds per cubic foot, in the
US, at least. Density figures in general are usually with reference to
the density of water.

Casady

On Thu, 06 Dec 2007 23:22:23 GMT, (Richard
Casady) wrote:

On Wed, 5 Dec 2007 07:41:59 -0500, "Sal's Dad"
wrote:

as 1/8 aluminum weighs about the same as 3/4
ply.

If you divide 2.7, the density of aluminum, by 6, you get .45. I
thought plywood was heavier than that.

Casady

It may be.
Black ash 0.54
Birch 0.67
red cedar 0.38 (!!)
see the table here...
http://woodsgood.ca/woodDensity.htm

Regards

Brian W