Oil Canning - Aluminum Hull
 

Looking for "words from the wise" here.
I have owned a 17', full-welded, aluminum hull boat for 11 years.
Over that time I have occasionally heard oil-canning coming from the bow
when going through moderate to severe chop (usually on the Columbia River -
some excursions to the bays along the Oregon coast)
Recently, it seems the problem is becoming more evident and in fact I can
now see where the hull has "flattened" out between the chine and the keel in
a short section between internal hull supporting members at the bow.
FYI..hull thickness is .125
The boat doesn't owe me a penny....really used it for these 11 years and
many a pacific Salmon has taken it's final nap in the fish box
;-)......however, no one makes a boat to match that I can find (the maker of
my boat discontinued the model 10 year ago) so, while buying a shiny new
boat is appealing, I am looking to fix the problem rather than replace the
boat.
The area of the hull that is affected is under a sealed compartment. Would
filling that compartment with 2-part expanding foam give me any relief or
would it just "mush" out when the hull deflects at wave impact?
I have also considered having a couple of lifting strakes welded to the hull
across the offending area.
Any thoughts?
Thanks in advance!

Don
Vancouver, WA

Oil Canning - Aluminum Hull
 

"Don Backous" wrote in message
...
Looking for "words from the wise" here.
I have owned a 17', full-welded, aluminum hull boat for 11 years.
Over that time I have occasionally heard oil-canning coming from the bow
when going through moderate to severe chop (usually on the Columbia
River -
some excursions to the bays along the Oregon coast)
Recently, it seems the problem is becoming more evident and in fact I can
now see where the hull has "flattened" out between the chine and the keel
in
a short section between internal hull supporting members at the bow.
FYI..hull thickness is .125
The boat doesn't owe me a penny....really used it for these 11 years and
many a pacific Salmon has taken it's final nap in the fish box
;-)......however, no one makes a boat to match that I can find (the maker
of
my boat discontinued the model 10 year ago) so, while buying a shiny new
boat is appealing, I am looking to fix the problem rather than replace
the
boat.
The area of the hull that is affected is under a sealed compartment. Would
filling that compartment with 2-part expanding foam give me any relief or
would it just "mush" out when the hull deflects at wave impact?
I have also considered having a couple of lifting strakes welded to the
hull
across the offending area.
Any thoughts?
Thanks in advance!

Don
Vancouver, WA



Poist this on www.riverjetmagazine.com in the forums. Somebody there
probably knows how your boat was built in the front and if you have a broken
weld or a lack of a stringer. What brand boat? My Jetcraft, you can get
to most of the front compartment via the anchor locker.

Oil Canning - Aluminum Hull
 

In his book, "Boat Strength" Dave Gerr calls for 1/8 aluminum to have
framing or stiffeners every 6" or so (IIRC). This maybe overkill in most
small boats, but sounds like you could use some more. The lifting strakes
(spray rails?) sound like a good idea, if you can't easily access the
inside. Probably just a piece of angle iron welded on, use self-tapping
screws to pull the panel back closer to shape.

You definitely want a welder experienced with light-gauge aluminum; you can
get a lot of weld distortion.

Sal's Dad

-- "Don Backous" wrote in message
...
Looking for "words from the wise" here.
I have owned a 17', full-welded, aluminum hull boat for 11 years.
Over that time I have occasionally heard oil-canning coming from the bow
when going through moderate to severe chop (usually on the Columbia
River -
some excursions to the bays along the Oregon coast)
Recently, it seems the problem is becoming more evident and in fact I can
now see where the hull has "flattened" out between the chine and the keel
in
a short section between internal hull supporting members at the bow.
FYI..hull thickness is .125
The boat doesn't owe me a penny....really used it for these 11 years and
many a pacific Salmon has taken it's final nap in the fish box
;-)......however, no one makes a boat to match that I can find (the maker
of
my boat discontinued the model 10 year ago) so, while buying a shiny new
boat is appealing, I am looking to fix the problem rather than replace
the
boat.
The area of the hull that is affected is under a sealed compartment. Would
filling that compartment with 2-part expanding foam give me any relief or
would it just "mush" out when the hull deflects at wave impact?
I have also considered having a couple of lifting strakes welded to the
hull
across the offending area.
Any thoughts?
Thanks in advance!

Don
Vancouver, WA

Oil Canning - Aluminum Hull
 

?
He'll have to be one helluva welder....
JR

Sal's Dad wrote:
Probably just a piece of angle iron welded on,

Sal's Dad

-- "Don Backous" wrote in message
...

Looking for "words from the wise" here.
I have owned a 17', full-welded, aluminum hull boat for 11 years.
Over that time I have occasionally heard oil-canning coming from the bow
when going through moderate to severe chop (usually on the Columbia
River -
some excursions to the bays along the Oregon coast)
Recently, it seems the problem is becoming more evident and in fact I can
now see where the hull has "flattened" out between the chine and the keel
in
a short section between internal hull supporting members at the bow.
FYI..hull thickness is .125
The boat doesn't owe me a penny....really used it for these 11 years and
many a pacific Salmon has taken it's final nap in the fish box
;-)......however, no one makes a boat to match that I can find (the maker
of
my boat discontinued the model 10 year ago) so, while buying a shiny new
boat is appealing, I am looking to fix the problem rather than replace
the
boat.
The area of the hull that is affected is under a sealed compartment. Would
filling that compartment with 2-part expanding foam give me any relief or
would it just "mush" out when the hull deflects at wave impact?
I have also considered having a couple of lifting strakes welded to the
hull
across the offending area.
Any thoughts?
Thanks in advance!

Don
Vancouver, WA







--
--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth

Oil Canning - Aluminum Hull
 

You got me - probably want to use aluminum angle, huh? ;-)
Sal's Dad

He'll have to be one helluva welder....
JR

Sal's Dad wrote:
Probably just a piece of angle iron welded on,

Sal's Dad

-- "Don Backous" wrote in message
...

Looking for "words from the wise" here.
I have owned a 17', full-welded, aluminum hull boat for 11 years.
Over that time I have occasionally heard oil-canning coming from the bow
when going through moderate to severe chop (usually on the Columbia
River -
some excursions to the bays along the Oregon coast)
Recently, it seems the problem is becoming more evident and in fact I can
now see where the hull has "flattened" out between the chine and the keel
in
a short section between internal hull supporting members at the bow.
FYI..hull thickness is .125
The boat doesn't owe me a penny....really used it for these 11 years and
many a pacific Salmon has taken it's final nap in the fish box
;-)......however, no one makes a boat to match that I can find (the maker
of
my boat discontinued the model 10 year ago) so, while buying a shiny new
boat is appealing, I am looking to fix the problem rather than replace
the
boat.
The area of the hull that is affected is under a sealed compartment.
Would
filling that compartment with 2-part expanding foam give me any relief or
would it just "mush" out when the hull deflects at wave impact?
I have also considered having a couple of lifting strakes welded to the
hull
across the offending area.
Any thoughts?
Thanks in advance!

Don
Vancouver, WA







--
--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth

Oil Canning - Aluminum Hull
 

I don't want to disclose the boat maker...just suffice it to say it is a
well known Oregon based company.
I have contacted them and they want me to bring it in for warranty
consideration. After all, it does have a lifetime guaranty on the hull to
the original owner. Now I may get to find out how much "water" that holds!
I'll keep my fingers crossed and let you know what they come up with.
Columbia River is shut down for springers...might as well get the boat fixed
now and be ready for June Hogs!

Don

"Sal's Dad" wrote in message
...
You got me - probably want to use aluminum angle, huh? ;-)
Sal's Dad

He'll have to be one helluva welder....
JR

Sal's Dad wrote:
Probably just a piece of angle iron welded on,

Sal's Dad

-- "Don Backous" wrote in message
...

Looking for "words from the wise" here.
I have owned a 17', full-welded, aluminum hull boat for 11 years.
Over that time I have occasionally heard oil-canning coming from the bow
when going through moderate to severe chop (usually on the Columbia
River -
some excursions to the bays along the Oregon coast)
Recently, it seems the problem is becoming more evident and in fact I
can
now see where the hull has "flattened" out between the chine and the
keel in
a short section between internal hull supporting members at the bow.
FYI..hull thickness is .125
The boat doesn't owe me a penny....really used it for these 11 years and
many a pacific Salmon has taken it's final nap in the fish box
;-)......however, no one makes a boat to match that I can find (the
maker of
my boat discontinued the model 10 year ago) so, while buying a shiny new
boat is appealing, I am looking to fix the problem rather than replace
the
boat.
The area of the hull that is affected is under a sealed compartment.
Would
filling that compartment with 2-part expanding foam give me any relief
or
would it just "mush" out when the hull deflects at wave impact?
I have also considered having a couple of lifting strakes welded to the
hull
across the offending area.
Any thoughts?
Thanks in advance!

Don
Vancouver, WA







--
--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth