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Alfred Archibald Linthorne
  • Kamloops British Columbia
  • Canada
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  • Chris Samoisy
  • wakataitea

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Aluminum Catamaran
53 Replies

I have built several boats from Marine Grade Aluminum I very much like the Pahi 42 desine .    I do not like the idea of dagger boards,  I prefer the small keel on the Tiki desines .I was hopeing to…Continue

Tags: aluminum, welded

Started this discussion. Last reply by Alfred Archibald Linthorne Apr 14.

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Latest Activity

Alfred Archibald Linthorne commented on wakataitea's group to many wharrams rest in a boatyard
" Stop Wharrams from rotting so quickly build them out of Aluminum.    Aluminum rots so  much slower"
Jun 29
Alfred Archibald Linthorne replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"My apologies my price was wrong the quote I got was 7.5  American dollars per sqft for 6061   12 x5 ft .250 for a 30,000 dollar  purchase from Samuel and son metal suppliers North America I miscalculated in transferring currencies. I…"
Apr 14
Alfred Archibald Linthorne replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
Apr 13
Budget Boater replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"You obviously have a strong bias. "Knowledgeable owners?" I am not sure I have met many of those. Most people succumb to marketing hype, including Wharram builders. I have owned, lived, sailed, worked, built and crewed on more boats,…"
Apr 13
Alfred Archibald Linthorne replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"I live in wood country but you will rarely see a wood boat here mostly fiberglass and coveted by many longtime knowledgeable boat owners  is aluminum light very fast to build repair and aluminum boats hold there value very well, I have always…"
Apr 13
boatsmith replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"I will not disagree that aluminum will not rot. It certainly will corrode and will fatigue. In the past I repaired many times the aluminum ferries in San Francisco.  My issue here is the ridiculous imo cost comparisons you are presenting. Why…"
Apr 13
Omar M. Rashash replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"LOL, you noticed that. I can get as much Sapele as I want locally for $5.50/bd. ft. I can get Goncalo Alves for $5, $10 if I want stripe. The only boat wood that's expensive is Teak,  starting at $30. All of this also ignores the Tiki…"
Apr 13
boatsmith replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"Aluminum is an option that might be suitable for some people. But the numbers posted here  are goofy!! "one piece of some foreign hardwood and not a big piece one board 2 inches thick about 4 square feet in all,  1200 dollars Ouch !…"
Apr 13
Jay replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"Alfred, Check these vids out if you have time. Part one was lost. That had the bulkhead setup and bottom plate forming. Might be some ideas there for you. There's still six or seven vids of the build. YouTube sailpalauutube user…"
Apr 13
Alfred Archibald Linthorne replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"Thank you for your great information but the aluminum electrical issue was resolved many years ago, yes there were problems when aluminum was first used for boats.  Spending my days siting in a marina is not my Idea of a pleasant life I prefer…"
Apr 13
Alfred Archibald Linthorne replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
Apr 13
Alfred Archibald Linthorne replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
Apr 13
Alfred Archibald Linthorne replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
Apr 13
Omar M. Rashash replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"Jay said- "Omar, respectfully, I can think of three reasons for an amateur to give an ally wharram a go - it's fun as hell, it's rewarding trying and you learn something new mostly on your own initiative and dime. I'd take a…"
Apr 11
Jay replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"Alfred.....sweet boat! I know five guys personally who built 48' alum cats as first time aluminum welders and builders. Add me that makes six. Out of the six guys, three had never cruised or lived aboard. Us other three did have years of full…"
Apr 11
Alfred Archibald Linthorne replied to Alfred Archibald Linthorne's discussion Aluminum Catamaran
"My latest boat in aluminum Below it took me 3 months building alone. I am not a welder by trade it is 26 ft 9ft 6 in Beam 250 hp ourboard"
Apr 11

Profile Information

I am:
A home builder, I want a Wharram
What boat (s) are you building or do you own?
I wish to build a Pahi 42 I have built 2 boats in Aluminum
Country, City, and State?
Canada Kamloops British Columbia
About me or us?
I hope to build a pahi 42 in Aluminum
Looking to?
I would like more info on Wharram desines built in marine Aluminum
Website:
http://archie.linthorne@yahoo.com

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40 FT aluminum hulland deck in 3 days

Forty foot aluminum hull and deck  welded in 3 days seeing is believing Utube (Fastwater video MPG) check this out it is why I wish to build a  Wharam catamaran in  welded aluminum 

Posted on August 6, 2016 at 8:30pm — 1 Comment

Comment Wall (3 comments)

At 9:10am on June 29, 2016, Chris Samoisy said…

don t listen to the naysayers from wharrambuilders club. they got no idea what alu boatbuilding is, neither the advantages and neither do they know that an aluminium wharram 42ft upwards is not heavier than plywood with fibre and all the toxic things they put in and on the hull. i can say you that you save a lot of money and weight building in aluminium. i make all brackets, shrouds attachments and evverything in alu. as you said with a nice miller system or like we have a fronius tps2700 the entire story about alu welding is becoming to be changed in something very easy even for beginner welders. our hull is 51 ft long and was discussed in the past ones in the wharrambuilders. of course one had to compare my 51ft wharram style cat (which is in the hullsize, full standing headroom the entire hull length, 2,5m maxbeam hull, 8,1mbeam) with the tehini sardin tin-like hull instaed of comparing it with a pahi 52 or the islander 55. there you will see that my hull (20mm keelplate, 6mm up to chine, 5mm sides and roof, 6mm ringframes each 700mm, 45/6mm stringers each approx.270mm, 4 beam 400 by 315mm/6mm thickness) is for its strength you can say light compared to wharram cats of same range. but much much much stronger i say. and 100 % recyclebar, no resins and fibres toxic crab stuf you know. i hope you see thatyou are on the right track. you are not the first one. approx. you are the 4th or 5 th one building alu wharram or wharram style. i will put a crab claw balanced sail on a A-mast in front and a freestanding mast on each hull near the stern and a lugsail on each. all togehter ca. 90m2. cheers chris

At 12:50am on June 30, 2016, Alfred Archibald Linthorne said…

Thank you Cris I saw a Aluminum boat a while ago that had been submerged for 20 years in the sea it was hauled out and cleaned  it looked great no ill effects I could see.   Then I was told it was build for the Navy to test how it would stand up to salt water it,  I asked when it was built I was told 1939. Wow that sold me.   Marine ply looks lovely but it is not inexspencive  . so much less time , work and cost  building in Aluminum

At 3:19pm on July 21, 2016, Alfred Archibald Linthorne said…

if one used common sense about dissimular metals and  corrosion is not a problem with aluminum  I mentioned that boat that was built for the US Navy it is  a 30 ft hull submersed in salt water for more than 20 years built in 1939 is still sailing today . this sells me on aluminum and on boats over 40 feet it is just as light as wood with fiberglass or even lighter and is availible in 8 ft x20 ft sheets so very few joints to deal with how many wood hulls out there that have not seen  any wood replacement in over 85 years 

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