tiki 30 beams for 26

[paul anderson]

hi everyone i have just read scott williams latest excellent blog and he suggests making tiki 30 beams for the tiki 26 as it is far less complicated to glass and all the structural bits are inside the beam itself.any help or suggestions would be appreciated as always.

cheers paul.

[kim whitmyre]

The locating pads on the deck that the beams sit on are best made of serious stuff, imho.  Vaea's were scary looking! They had been made up to height with 3/4" (19mm) and 1/4" (6mm) ply of some sort. With all that end grain, they sucked up water like a sponge! When I glassed the forward beam, I discovered they were really ugly: I smacked them hard with a hammer and popped them right off!  The 1/4" piece was still epoxied to the deck, but the 3/4" piece was totally wet and going rotten.

 

On Vaea, the locating pads are all teak now. . .

[Scott Williams]

Good point, Kim.  I made all mine somewhat oversized and out of solid teak.  Well worth it.

 

[paul anderson]

that is it fellas;)carbon fibre for the mast beam and solid oversized teak for the locating blocks.

[Russell and Janet Puryear]

Multihulls are like backpacks.  You take care of the ounces and the pounds take care of themselves.  I'm a decentant of the Piver designs, and weight will ruin the boat.  If you over engineer the beams, perhaps building the hulls from 9mm instead of 6mm would be a good idea in case you get rammed by a horny humpback.  Where would it stop?

As for the spliced plywood for the web on the beams:  Its acting mostly in shear not bending.  it's there to keep the top and bottom chords apart and from moving independantly.

As for the the triangular shape:  That really sucks, there's got to be a better way.  A larger top chord would be a great addtion to sit on.

IMHO

[Thomas Nielsen]

Damn the torpedos! I'm going out and getting myself three steel W30x108's and bolting the hulls together!

[Russell and Janet Puryear]

Well, Thomas, you bring up an interesting alternative.  But I might suggest a W18x100 for the savings in weight and the lower windage.  And I do believe with either of these solutions the dolphin striker could be eliminated.  And, of course the cockpit depth could be increased by a like amount, but the additional submersion of the hulls might require a redesign of the motor mount and an extra short shaft (XSS) outboard.  I would still recommend glassing and epoxy coating the surface of the beams for salt water resistance, unless they were either corten steel or asphalt coated.

 

I'm working on the flexible hull to bean connections now.  I believe if they are lubricated with relative bearing grease and lashed on with fallopian tubes the whole structure will work nicely.

[Thomas Nielsen]

LMAO! Sometimes these forums get a little serious. Too bad there isn't an easy way to get us all down to the pub to solve all these important life problems over a pint and a shot!

[Russell and Janet Puryear]

we could sail there??

[Thomas Nielsen]

Instead of the "Vende Global" we could have the "Rendez Global". Kerguelen 2014! On second thoughts let's do something way warmer - Tour de Caribe

[Thomas Nielsen]

Whrn Wharram designed the coastal Tiki series James and Haneke likely didn't anticipate too many contemplating offshore. Atleast for the first 45 minutes. Perhaps what we need here is what is known as offshore beams. We know that the hulls can take it, there shape is perfect. So what features would you add to make an offshore beam?

[boatsmith]

Here are some pics of the composite beams we built for the T8m

[Russell and Janet Puryear]

Nice solution.  I should have bought a set from you.