Search found 1364 matches

by kmorin
Wed Oct 17, 2018 8:08 pm
Forum: Hauling Your Alloy Rig
Topic: Cracked Trailer frame repair ideas
Replies: 17
Views: 428

Re: Cracked Trailer frame repair ideas

Whats the best way to weld this crack and make this area strong again? you asked, I just replied to that question. The crack completely compromises the side to side (lateral moment resistance) of the beam's lower edge. So the doubler is to address that- alone. Yes, I realize you're sistering/fishpl...
by kmorin
Wed Oct 17, 2018 2:42 am
Forum: Hauling Your Alloy Rig
Topic: Cracked Trailer frame repair ideas
Replies: 17
Views: 428

Re: Cracked Trailer frame repair ideas

Tfitz, the weld shown is cold lapped. the lower edge is not fused to the flange top surface- but the top is fused to the vertical web surface; although the start and stop need work. I'd suggest grinding this out, gouging the weld metal out and using run-in blocks. This is a piece of 3/16" or so plat...
by kmorin
Wed Oct 10, 2018 1:54 pm
Forum: Hauling Your Alloy Rig
Topic: Cracked Trailer frame repair ideas
Replies: 17
Views: 428

Re: Cracked Trailer frame repair ideas

Tfitz, the point-load on the bottom flange would also be reduced by the cross member-to-top-flange bracing as that would re-load the I-beam in the full section- not solely the bottom flange. By triangulating the load- so the cross member pulls down on both top and bottom in a fixed triangle- the fle...
by kmorin
Tue Oct 09, 2018 11:50 am
Forum: Hauling Your Alloy Rig
Topic: Cracked Trailer frame repair ideas
Replies: 17
Views: 428

Re: Cracked Trailer frame repair ideas

Tfitz, the top of the bent beam is flexing in and outward (reference the centerline of the trailer) or the break failure wouldn't be at the bottom of the inverted T of the I beam. So, gouge out- weld and then put a gusset from the box cross beam up to the top flange with a or a V brace (looking down...
by kmorin
Wed Aug 29, 2018 10:52 am
Forum: Alloy Boat Forum
Topic: Difference in 26 to 28
Replies: 4
Views: 306

Re: Difference in 26 to 28

trout, I don't think the 2' is a matter of life and death - nothing un-seaworthy in a well designed and built 26' that a 28' will survive over the shorter hull! I was (more focused) discussing what gets stuffed into the extra 2' - $ in electronics and fitting out/finish is where the changes usually ...
by kmorin
Sun Aug 26, 2018 11:17 pm
Forum: Alloy Boat Forum
Topic: Difference in 26 to 28
Replies: 4
Views: 306

Re: Difference in 26 to 28

/trout, I guess I'd have to ask if you're equating LOA with some linear pricing or performance? LOA, when combined with the other dimensions give the displacement and that is definitely NOT a linear proportion in boats. Next, accommodations often shift in scale/scope/quality at different LOA's so; a...
by kmorin
Fri Aug 17, 2018 1:58 pm
Forum: Alloy Boat Forum
Topic: Maine downeasters vs. PNW aluminum boats
Replies: 9
Views: 716

Re: Maine downeasters vs. PNW aluminum boats

Pilgrim, this post is about solar panels on welded boats, and using them North of the Puget Sound, general remarks. First mounting the panels is kind of a rodeo- UNLess the entire cabin roof/top were designed for the installation? By this I mean that panels' mounts are usually in the corners and inv...
by kmorin
Thu Aug 16, 2018 1:04 am
Forum: Alloy Boat Forum
Topic: Maine downeasters vs. PNW aluminum boats
Replies: 9
Views: 716

Re: Maine downeasters vs. PNW aluminum boats

Pilgrim if you want to keep to the slow lane in regards hull speed? AND you want to do work on the fit out and finish- why not consider exploring commercial fishing boats of welded aluminum? I think there'd be a few around that need some work? Buy one that is a decent hull, and strip her out and ref...
by kmorin
Tue Aug 14, 2018 4:37 pm
Forum: Alloy Boat Forum
Topic: Maine downeasters vs. PNW aluminum boats
Replies: 9
Views: 716

Re: Maine downeasters vs. PNW aluminum boats

Pilgrim, your first question about designers is valid so I'll try to reflect on the circumstance in the PNW. The relative time of market acceptance of recreational use welded aluminum planing boats in the >20some' to < 40' range LOA, means that designers haven't had the two to five generations to be...
by kmorin
Tue Aug 14, 2018 12:03 pm
Forum: Alloy Boat Forum
Topic: Maine downeasters vs. PNW aluminum boats
Replies: 9
Views: 716

Re: Maine downeasters vs. PNW aluminum boats

Pilgrim, I'll note #7 too. With thrust outboard of the keel plane the turning moment arm is greater than on centerline- add to this fact the ability to go forward on one and reverse on the other engine and outboard steerage can be described as in its own class compared to a single screw inboard rudd...
by kmorin
Tue Aug 14, 2018 1:14 am
Forum: Alloy Boat Forum
Topic: Maine downeasters vs. PNW aluminum boats
Replies: 9
Views: 716

Re: Maine downeasters vs. PNW aluminum boats

Pilgrim, I'll take a shot at item #1 in Chaps' reply and notes from Jon too. #1. The shape of the bottom of planing boats is generally a constant V or deadrise angle or is warped, varied, changing deadrise angle from the keel to the chine intersection: I agree that is generally the case. However, sa...
by kmorin
Thu Aug 02, 2018 2:03 am
Forum: Alloy Boat Forum
Topic: Welder needed
Replies: 5
Views: 418

Re: Welder needed

my email is < k.morin@kmmail.net > Pls. don't hesitate to email them to me and I'll find some way to get them up for the Forum to view.

Cheers,
Kevin Morin
Kenai, AK
by kmorin
Sat Jul 28, 2018 1:08 pm
Forum: Alloy Boat Forum
Topic: Welder needed
Replies: 5
Views: 418

Re: Welder needed

alumioforte, I'm not applying for the welding job but wondering if you'd be able to share the lines/plans images of the skiff you're building? You describe it as a "specialty project" so that alone invokes interest - and small welded aluminum skiffs are usually very interesting to see- regardless of...
by kmorin
Tue Jul 10, 2018 3:52 pm
Forum: Alloy Shop Talk
Topic: Pacific boat fuel tank, lasted only 11 yrs.
Replies: 14
Views: 1683

Re: Pacific boat fuel tank, lasted only 11 yrs.

The outside of the same bracket/strap piece is shown below. Strain Crack_6.jpg IF Capt'n Dave's tank bend looked like this ??? then we can suppose that the region was susceptible to accelerated corrosion in the cracks' valleys shown above? If these regions are also not the same as the original paren...
by kmorin
Tue Jul 10, 2018 3:46 pm
Forum: Alloy Shop Talk
Topic: Pacific boat fuel tank, lasted only 11 yrs.
Replies: 14
Views: 1683

Re: Pacific boat fuel tank, lasted only 11 yrs.

This bracket was found in the extra's pile and is included to show the inside and outside of a too tight bend. Inside this bend is a line where the knife edge of a steel type nose bar pushed down on this strip of 1/4" (alloy unknown). Strain Crack_5.jpg the line in the bottom of the bend area was fo...
by kmorin
Tue Jul 10, 2018 3:43 pm
Forum: Alloy Shop Talk
Topic: Pacific boat fuel tank, lasted only 11 yrs.
Replies: 14
Views: 1683

Re: Pacific boat fuel tank, lasted only 11 yrs.

Next is another piece from the same anchoring chocking and rode handling system on the river rowing dory. Another piece at a different location- but the damage here is more severely cracked with more pronounced ridges. strain crack_2.jpg This bracket shows obvious surface cracks: the potential for c...
by kmorin
Tue Jul 10, 2018 3:39 pm
Forum: Alloy Shop Talk
Topic: Pacific boat fuel tank, lasted only 11 yrs.
Replies: 14
Views: 1683

Re: Pacific boat fuel tank, lasted only 11 yrs.

Next is another piece I found on a bracket in a rowing river dory- the bracket is bolted to the gunwale and is not part of the builder's original equipment as near as I can tell? strain crack_1.jpg this 3/16" or 1/4" bracket was bent so the outside of the bend is rough and ridged like the 1/8" piece...
by kmorin
Tue Jul 10, 2018 3:35 pm
Forum: Alloy Shop Talk
Topic: Pacific boat fuel tank, lasted only 11 yrs.
Replies: 14
Views: 1683

Re: Pacific boat fuel tank, lasted only 11 yrs.

Closing in on the image above- due to photo/site handling file difficulties I'm posting these all in one post each. Not sure what's happened to the photo handling? But Photobucket sure has become less than helpful!! The site also is acting odd- so will try to post images one at a time? Closing in on...
by kmorin
Tue Jul 10, 2018 3:32 pm
Forum: Alloy Shop Talk
Topic: Pacific boat fuel tank, lasted only 11 yrs.
Replies: 14
Views: 1683

Re: Pacific boat fuel tank, lasted only 11 yrs.

I mentioned that Capt'n Dave's tank may have failed along a bent corner because in the video above at approximately 17:00+ Dave shows the deterioration of the bent corner material. He actually pushes his pocket knife blade through the tank's bent corner because the parent metal has become so corrode...
by kmorin
Sun Jul 08, 2018 4:36 pm
Forum: Alloy Shop Talk
Topic: Pacific boat fuel tank, lasted only 11 yrs.
Replies: 14
Views: 1683

Re: Pacific boat fuel tank, lasted only 11 yrs.

Recently I've been involved with new projects and the subject of bending aluminum has become front and center. I'm bumping Capt'n Dave's thread on his tank to suggest that his video may show the tank was bent incorrectly? AND most importantly; the incorrect bending radii of the tank corner seam- cou...
by kmorin
Thu Jul 05, 2018 1:18 am
Forum: Alloy Boat Forum
Topic: Aluminum hartop frame
Replies: 5
Views: 499

Re: Aluminum hartop frame

Skiffing, no one is going to have a 'bolt together' top kit for your boat . You may be able to tolerate a series of aluminum scaffolding parts - and make do?- but it will never be the same level of cosmetics that a welded tower/cover frame will provide: you may accept the various cast fittings on th...
by kmorin
Tue Jul 03, 2018 4:54 pm
Forum: Alloy Boat Forum
Topic: Who Does A Marine Survey Matters
Replies: 3
Views: 353

Re: Who Does A Marine Survey Matters

building a welded aluminum boat is a bit more work in terms of "supply chain" than cellulose or plastic because there are many more suppliers of hardware, fixtures and fluid connectors for the previous two hull material types than for welded aluminum boats. As a result; finding, specifying, buying a...
by kmorin
Tue Jul 03, 2018 12:49 pm
Forum: Alloy Boat Forum
Topic: Who Does A Marine Survey Matters
Replies: 3
Views: 353

Re: Who Does A Marine Survey Matters

it is not unreasonable to ask a Surveyor for his/her list of 'check items'. For example in the fit out and plumbing category (regardless of how it is titled) is the alloy of the tank-to-hose fittings noted? OR, if the alloy is not shown/confirmed in every boat with a live aboard cabin: that list of ...
by kmorin
Tue Jul 03, 2018 11:59 am
Forum: Alloy Boat Forum
Topic: Who Does A Marine Survey Matters
Replies: 3
Views: 353

Who Does A Marine Survey Matters

I'm not operating a full time boat building business as I have in the past. I am working as a helper and part time welder for a project so I've gotten more involved in welded aluminum boats recently than in the past four or five years. I was called to help look over some problems with a boat, recent...
by kmorin
Sat Jun 30, 2018 2:05 pm
Forum: Alloy Boat Forum
Topic: Corrosion advice
Replies: 12
Views: 1024

Re: Corrosion advice

capesteve, generally a single point of corrosion can be assigned to some form of stray current, poor wiring, hull used as an anode. But as Chaps has mentioned several times; if you can't find a way to inspect the interior of the bilge- you can't determine if you have a single point of corrosion/exca...