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James Wharram Designs

Unique self-build sailing catamarans, inspired by the double canoes of the Polynesians

Find the Right Boat for You

The Wharram Design Book is the best starting point if you are still exploring the full design range. It gives an overview of each self-build model, introduces the Wharram boat builder’s mindset, and helps you narrow down which boats may suit your needs, dreams and sailing plans. It is available as a digital download.

A Study Plan then takes you deeper into a particular design. With large plan sheets, design notes, photographs, performance information, article extracts, FAQs and a materials list to help estimate local building costs, it gives you a clearer sense of the boat before you move on to the full Boat Building Plans.

Study Plans are only available as digital downloads. You can print them at home if you wish.

The Mana 24 design does not have a Study Plan, comprehensive design information is freely available.

Discounts are applied automatically when you add multiple Study Plans to your basket:

  • Two Study Plans: 10% off
  • Three Study Plans: 20% off
  • Four or more Study Plans: 30% off
Islander 39 3D drawing
Black and red piratical looking catamaran
Tehini Study Plan - Image 2

Tehini Study Plan

£16.50

The Tehini Study Plan is intended to help you decide if this design is for you.

Category:

Description

The TEHINI is breathtakingly beautiful. She has a timeless look about her and dominates any harbour with her rakish, piratical looking lines. James built this boat as his own and spent 10 years living on her with five others.

These Plans include design modifications for Tehini Mk II. These comprise improved accommodation space with raised decks, increased overall beam, added centreboards (optional), increased sail area and various other additional details.

Study Plan Contents

  • 1 x A1 Plan Sheet
  • 1 x A2 Plan Sheet
  • 1 x A3 Design Modifications Sheet
  • 1 x A3 colour Photo Sheet
  • Materials List
  • 17 x Pages of magazine article extracts
  • FAQ list

Design Data

Building Method: Ply/Timber/Epoxy/Laminate
Length Overall: 51′ 15.55 m
Beam overall: 24′ 6″ 7.56 m
Waterline length: 40′ 12.19 m
Draft: 2′ 8″ 0.81 m
Weight: 4 tons
Loading capacity: 3-4 tons
Working sail area: 820 sqft 76.2 sqm
Max. sail area: 1346 sqft 125 sqm
Width of bunks: 2′ 11″ – 2′ 6″ tapered 0.9 m – 0.75 m tapered
Building Time Estimate: 3500 hours

Visual Tour

Two vintage movies filmed by Ruth Wharram in the early days of Wharram Catamaran designs. What these two films show is a glimpse back into an era of freedom and adventure, hardship and joy, a delightful, but important piece of multihull history. Compared to the present day yachting scene, the building conditions and even some of the boats look perhaps a little primitive, but they set the scene for the next 30 years of multihull and Wharram Catamaran development.
Tehini Photo Gallery

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