Steinar Alvestad Steinar Alvestad

Elementarry - Norway

This blog will follow the construction of an extended Elementarry, the predecessor to the E25. I put my main project on hold last year (painful!) to pursue a telescoping mast design, starting with a smaller prototype to test its feasibility. The rig will feature a single sail on a three-section D-shaped mast. Unlike a schooner rig, the rudder location is more critical for the shunting, so I’ll also test rudder design and construction methods.

Part 1 - Mast section 1 and 2

Part 2 - Rudder unit build tests

Part 3 - Rudder moulds

Part 4 - Beams

Part 5 - Hulls

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Steinar Alvestad Steinar Alvestad

C50-Australia

C50 under construction in Australia

C50 under construction in Australia. Follow the build here.

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Steinar Alvestad Steinar Alvestad

C50 - Brazil

C50 under construction in Brazil. The owner has modified it to feature a full width cabin top.

Updates:

C50 - Brazil 2025

C50 - Brazil 2024

C50 - Brazil 2023

C50 - Brazil 2022

C50 - Brazil 2021

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Rob Denney Rob Denney

C50 - Sweden

These polars were prepared by Rick Willoughby based on theory validated  by his several years of optimising the 18m proa in Melbourne.

C50 under construction in Sweden. The owner has modified the leeward hull and extended it to 53 feet.

Building blog 2022

Building blog 2021


C53 VPP

These polars were prepared by Rick Willoughby based on theory validated  by his several years of optimising the 18m proa in Melbourne. The polars are for a slightly longer (53′ vs 50) version of the C50 with 10 sqm less sail area.

The first is the base line, the second with one reef at 20 knots TWS and the third with the weight distribution optimised for speed. Of note is that these speeds are achieved without extras.  Polars for other high performance cruising multis are similar, but require expensive, time consuming and difficult to set well extras.  

As can be seen from the blog, Rickard is a careful, accurate builder. He has weighed the built components and is confident the boat will weigh 4,500 kgs ready to cruise.

It will be fascinating to see these polars confirmed when the boat is launched.

Baseline

One reef (60 m2)

Weight distribution optimised for speed

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