Search found 1735 matches

by kmorin
Sat Apr 07, 2012 11:41 pm
Forum: Your Alloy Boat
Topic: Almost new boat and new to the forum
Replies: 83
Views: 49450

Re: Almost new boat and new to the forum

sealion, carpeted bunks over copper treated wood is not going to do your hull any good. The carpet has caused countless guys to get poultice corrosion cells under welded boats and the copper solution in the wood treatment is worse! Combining the two is just building in a failure point in your boat. ...
by kmorin
Sat Apr 07, 2012 8:33 pm
Forum: Custom Skiff Build
Topic: 25' Alloy Build
Replies: 46
Views: 50646

25' Alloy Build: welding details

Another detour before we get back on the main road is to review welding aluminum just a little because this is still an area where there is a general lack of knowledge even among alloy boat owners who don't weld. Aluminum is welded by two main processes TIG- 'tungsten inert gas' (or GTAW Gas;Tungste...
by kmorin
Sat Apr 07, 2012 7:35 pm
Forum: Custom Skiff Build
Topic: 25' Alloy Build
Replies: 46
Views: 50646

25' Alloy Build: Jigs, fixtures, tools

Well, I guess I was getting ahead of myself. I said in the preface that I'd make the boat a little different that the 'normal' methods to help compensate for my old carcass. Here I'll make some of those differences known so readers won't think this thread is by a complete fool. (maybe partially a fo...
by kmorin
Sat Apr 07, 2012 1:53 pm
Forum: Custom Skiff Build
Topic: 25' Alloy Build
Replies: 46
Views: 50646

25' Alloy Build:Design Decisions II

chaps, goatram, sldave, thanks for the encouragement; I suspect that PNW readers/boaters will find the design choices made closer to their own ideas compared to those who live in warmer latitudes where several of the choices has less impact on year round boating? I usually forget to mention a drawin...
by kmorin
Sat Apr 07, 2012 1:08 am
Forum: Custom Skiff Build
Topic: 25' Alloy Build
Replies: 46
Views: 50646

25' Alloy Build: design concept

Design decisions I tried to allow the boat owner to make the design decisions on this boat. I know that doesn't sound unreasonable, but it was more work as a design than most I've done in the past. I don’t agree with many of the decisions in this design; but my goal was to be the hands that drew- no...
by kmorin
Sat Apr 07, 2012 12:57 am
Forum: Custom Skiff Build
Topic: 25' Alloy Build
Replies: 46
Views: 50646

25' Alloy Build

Since welder has so kindly created a "custom build" space here, and I'm not doing production work, I will add another thread here documenting a boat I'm building on a one off basis. Preface This thread is to show a boat built of the Miracle Metal by cutting and welding for those who don’t ...
by kmorin
Tue Apr 03, 2012 9:41 pm
Forum: Alloy Boat Forum
Topic: acid washing your Alloy...
Replies: 29
Views: 34396

Re: acid washing your Alloy...

welder, goatram, I would add to my (novel length?) post on etching or acid cleaning aluminum that the acids will all dilute to such minute/low/miniscule concentrations they're less active than vinegar down the sink. So neutralizing (using a base to counter the ph until neutral) them is not important...
by kmorin
Mon Apr 02, 2012 9:07 pm
Forum: Your Alloy Boat
Topic: Jimmy Gravois is at again
Replies: 14
Views: 12425

Re: Jimmy Gravois is at again

Welder, I asked for a picture of the framing of a Gravois BOAT and you post something from Caterpillar - like a 60 yard, strip-mining, drag line bucket!! Obviously this boat is the toughest boat for its size I have ever seen. Does Jimmy & Co. draw these 'boats' or is there a naval architect with...
by kmorin
Sat Mar 31, 2012 12:12 pm
Forum: Your Alloy Boat
Topic: Jimmy Gravois is at again
Replies: 14
Views: 12425

Re: Jimmy Gravois is at again

Interesting topsides plating technique to get the hollow flair instead of the one pieces side flam more common in this size skiff. By planking vertically with 'hour glassed' shaped pieces and pulling to an internal set of frames and stringer the builder was able to get a good hollow in the bow while...
by kmorin
Fri Mar 30, 2012 8:34 pm
Forum: Custom Skiff Build
Topic: Net Skiff Build
Replies: 56
Views: 55445

Re: Net Skiff Build

Randy, I'm not in any hurry, I'm working on a skiff myself (not a net skiff) and enjoying the shop time quite a bit. As long as I can melt the Miracle Metal together I'm content- when I can do that in a skiff build, well it's a good thing . let me know when I should get the next few steps posted and...
by kmorin
Sat Mar 24, 2012 11:44 am
Forum: Alloy Shop Talk
Topic: Longitudinal Twist...
Replies: 5
Views: 7105

Re: Longitudinal Twist...

acctTwrs, I'm not sure you're seeing the relative stiffness of the (welded) boat in considering (possible) torsion as something to consider? If we made a tower assembly of 1/8" tube soldered together, the individual tubes could and would bend, or deflect. But if the same tower/tube assembly is ...
by kmorin
Sat Mar 17, 2012 2:58 pm
Forum: Alloy Pictures
Topic: Canadian alloy cat!
Replies: 14
Views: 8562

Re: Canadian alloy cat!

Mike, the other pages confirm my suspicions about the boat's intended waters: flat, inland, calm. Notice the same designer has a very high deck/bridge panel 40' and 44' cats on the other pages? These are more open sea boats so I'll suspect he doesn't intend this cat to go outside sheltered waters, a...
by kmorin
Sat Mar 17, 2012 12:38 pm
Forum: Custom Skiff Build
Topic: Net Skiff Build
Replies: 56
Views: 55445

Net Skiff Build: Bottom Shape Forward

netman, in order to 'see' how 'sharp' or narrow the bottom is you'll need to "do a construct" of the body plan or section view of the lines at the stations you've used in your grid. http://i383.photobucket.com/albums/oo273/kevinmorin_photo/Hull%20Lines/Lines_7a.jpg I hope this illustration...
by kmorin
Sat Mar 17, 2012 12:20 pm
Forum: Custom Skiff Build
Topic: Net Skiff Build
Replies: 56
Views: 55445

Net Skiff Build: Bottom Shape Forward

netman, we're discussing the forward bottom shape and I want to review a bit of what's been shown, here and in other topics and posts. http://i383.photobucket.com/albums/oo273/kevinmorin_photo/Hull%20Lines/COMPARE_1A.jpg these two skiff hull forms are being used to illustrate this aspect of your cur...
by kmorin
Sat Mar 17, 2012 12:07 pm
Forum: Custom Skiff Build
Topic: Net Skiff Build
Replies: 56
Views: 55445

Net Skiff Build: lines- around and around

netman, here are two images that should begin to look pretty familiar by now? http://i383.photobucket.com/albums/oo273/kevinmorin_photo/Hull%20Lines/Netskiff_lines_1a.jpg This one shows the plan and profile views of and some 'working lines'. In the profile view there is a line at the ht of the bow, ...
by kmorin
Sat Mar 17, 2012 11:03 am
Forum: Alloy Pictures
Topic: Canadian alloy cat!
Replies: 14
Views: 8562

Re: Canadian alloy cat!

I agree with Chaps this hull looks, as much as can be seen in the video, as a "split monohull with a bridge over the two halves". Where the design totally fails is the forward third of the hull. Cats are a design challenge and this one will probably be fine in the flat calm bay of the vide...
by kmorin
Fri Mar 09, 2012 10:32 pm
Forum: Custom Skiff Build
Topic: Net Skiff Build
Replies: 56
Views: 55445

Re: Net Skiff Build

Randy, AAB.com- I doubt you've missed me... but, I'm back with the digitally connected ! I ended up with a hard drive sector problem, a DSL modem problem and work related preoccupation! That was enough to slow down my already limited communications skills and abilities like going aground on the Nakn...
by kmorin
Fri Mar 09, 2012 7:48 pm
Forum: Alloy Pictures
Topic: stringers
Replies: 35
Views: 22158

tower/console

AcctTwrs the tube work looks flawless. My only remark is a design question. If the you spent the time and effort to make sweet harmonious bends to the two different sized horizontals just above the console, why didn't you consider making the after hand runner align to the end of the top of the two h...
by kmorin
Thu Mar 08, 2012 12:04 am
Forum: Custom Skiff Build
Topic: Net Skiff Build
Replies: 56
Views: 55445

Re: Net Skiff Build

netman, Put some raked keel and transom lines down. I'd suggest you rake the transom aft 20deg's and the bow forward about 3' in 3' of rise. Then put in a keel. First draw the keel in profile and then 2" above that (in scale) draw a straight flat horizontal chine in the after 6' of the hull. Th...
by kmorin
Tue Mar 06, 2012 12:02 am
Forum: Custom Skiff Build
Topic: Net Skiff Build
Replies: 56
Views: 55445

Re: Net Skiff Build

Randy small emergency here. I have lost part of my drive and the photo-editing software was in that sector. I can't get the illustrations mounted until I get some recovery done so I can edit down the huge files into ' postable ' sizes. Will be back soonest- I'm working on this ASAP. Please bear with...
by kmorin
Sun Feb 26, 2012 7:12 pm
Forum: Alloy Boat Forum
Topic: The "Tinny" sound?
Replies: 8
Views: 6562

Re: The "Tinny" sound?

fisherman, there are a couple of events going on there. I'll 'resonate' BroadCove's post. One is resonance a sort of 'internal echo' of the boat. Another is the harmonics, they're kind of related in some ways but in general they're different 'animals'. Depending on the boat, engine and drive you can...
by kmorin
Sat Feb 25, 2012 1:51 pm
Forum: Alloy Boat Forum
Topic: Testing, testing
Replies: 6
Views: 3414

Panga in welded alloy

Dawg, in all truth, that shape would build in welded alloy very well. It lends itself to 'planking' in sheet/plate and has numerous 'strakes' or longwise hull transitions that would build in aluminum. I can see two main reasons it is not readily offered, now, one is the increase in welding; the long...
by kmorin
Fri Feb 24, 2012 10:22 pm
Forum: Custom Skiff Build
Topic: Net Skiff Build
Replies: 56
Views: 55445

Net Skiff Build: partial BOM

netman, yes a 2" bottom camber aft will be fine, the chines will rise to the bow stem as they curve in and that rise gives the bottom shape, if the working area forward is too steep you can extend the foredeck aft to cover the bottom further. I'd plan on using the 20x6 for the bottom plate and ...
by kmorin
Fri Feb 24, 2012 12:34 pm
Forum: Custom Skiff Build
Topic: Net Skiff Build
Replies: 56
Views: 55445

Net Skiff Build: battens for drawing

Netman, I agree that wood battens can be fine, and will work but to make one from the pot strips you'll have to rip a narrow, uniform strip from the oak then plane/sand/fair the batten. The reason people use plastic is they're uniform and smooth but wood is great, and does a fine job. The main quest...
by kmorin
Fri Feb 24, 2012 1:47 am
Forum: Custom Skiff Build
Topic: Net Skiff Build
Replies: 56
Views: 55445

Net Skiff Build: more lines images

Randy, hopefully I'm making more sense? here are some additional images to further our discussion. http://i383.photobucket.com/albums/oo273/kevinmorin_photo/Hull%20Lines/sheerline_2a.jpg http://i383.photobucket.com/albums/oo273/kevinmorin_photo/Hull%20Lines/sheerline_1a.jpg I drew a big white line a...