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SIEJA Edouard
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I am:
A home builder, I want a Wharram, Just Looking
What boat (s) are you building or do you own?
wharram tiki 30
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Comment Wall (2 comments)

At 10:33pm on June 15, 2015, WaveDancer & Bella said…

Hi Edouard

thanks for your request. Well, the main reasons to stretch the Tiki 30 were 3:

1. More buoyancy and payload (diving compressor and bottles are heavy) plus often 300 ltr water in cans and 200 kg fuel in cans. 2. Less hobby horsing 3. More space in the cockpit.

Unfortunately my builder lost all the drawings and calculations due to a computer virus.  But to stretch the boat you should only do to a certain extend otherwise you better build a Tiki 38.  You should always have the structural strenght in mind.  We stretched her between the bulkhead no. 1 (aft) and the next bulkhead no. 2 

We also reinforced the bows and the beams since a lrger boat also produces more loads on all systems.  The lashing system worked perfect. No need to change this.

We also changed the 1. mast which was to weak and had to much flex. Gunther Nutt (SeaScape Ltd.) build a perfect convex curved mast, also 75 cm higher, with more diameter, which prooved 100% stable and strong enough to beat any weather. 

The mainsail got larger to.

The width of the boat remained as per plan, what gave us a very good maoeverability. We never had problems with tacking. The more width the more momentum you need to get her through the wind when tacking.

What we did not change but should have to:

Rise the cabin roof for more headroom inside!

The 2nd bimini was OK, still today I'd probably build a fixed pod for better protection during bad weather and long cruises (but mind the additional weight! Kevlar?)

Engine: The Honda 10HP was working well but in choppy seas we had some cavitating. I'd choose a Yamaha 9.9 hp or stronger with a ultra long shaft or as an alternative 2 x 6 HP Tohatsu with alternator and ultra long shaft. How ever 10 - 12 HP are the lower end for this kind of boat. If you want speeds more than 6 kn under engine you'll need more power. This is important if you sail in areas with lots and strong currents.

Other gear: Raymarine 2000 Autopilot, 4 x 100W top quality solarpannels, 4 x 100 Amp. batteries, chartplotter, 110 ltr refrigerator, 2.4 m inflatable dinghy (hardbottom) with 3 hp Yamaha which took nicely place on the aft-deck.

2 big anchors, 1 small anchor, 1 dinghy anchor all Mansons.  50 m chain, 4 x 50m wharp lines, 1 x 100m anchorline.

All shrouds near the main sail were fitted with chafing protectors. (centipieds??)


WaveDancer is probably the toughest and fastes Tiki ever built. We outsailed regularly larger boats, cats and monos. BUT you need a bit of wind. Low wind performance was OK for a cruising boat but poor for racing.


Main, genoua, working jib, storm jib, flyer (instead of a spinaker)

Cheers and good luck with your project.


At 12:55am on May 9, 2017, Charles Eugene Marie said…

merci.j'ai multiplié toutes les cotes de longueur par a peu prés 1.04. chaque compartiment est plus long . j'aime pas avoir les pieds qui dépassent du lit...les coques sont sensiblement de la même largeur, mais l'ensemble fait 5.30 mètres. j'approche gentiment de la fin de chantier.

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