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• Sailboat Guide

Evolution 26

Evolution 26 is a 25 ′ 9 ″ / 7.9 m monohull sailboat designed by Julian Everitt and built by Evolution Yachts Ltd. starting in 1976.

Rig and Sails

Auxilary power, accomodations, calculations.

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

SA/D = SA ÷ (D ÷ 64) 2/3

• SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
• D : Displacement in pounds.

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Ballast / Displacement * 100

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

• D: Displacement of the boat in pounds.
• LWL: Waterline length in feet

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

• D: Displacement of the boat in pounds
• LOA: Length overall in feet
• Beam: Width of boat at the widest point in feet

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

CSV = Beam ÷ ³√(D / 64)

Some had fractional rigs. A BMW diesel was offered as an option. Thanks to the designer for providing corrections. Last 40 boats built by Fletcher Sportsboats Ltd.

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Review of Evolution 26

Basic specs..

The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.

The Evolution 26 is equipped with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment.

DaggerBoard aka Sword

The Evolution 26 is equipped with a daggerboard keel. A daggerboard is a lifting keel that can be lowered and raised, allowing the boat to enter shallow waters as well.

The boat can sail close to the beach as the draft is just 0.30 - 0.40 meter (0.98 - 1.28 ft) dependent of the load. See immersion rate below.

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

What is Capsize Screening Formula (CSF)?

The capsize screening value for Evolution 26 is 2.20, indicating that this boat would not be accepted to participate in ocean races.

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 6.1 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Evolution 26 is about 118 kg/cm, alternatively 665 lbs/inch. Meaning: if you load 118 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 665 lbs cargo on the boat it will sink 1 inch.

Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

What is Motion Comfort Ratio (MCR)?

What is L/B (Length Beam Ratio)?

What is a Ballast Ratio?

What is Displacement Length Ratio?

What is SA/D (Sail Area Displacement ratio)?

Maintenance

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 20m 2 (215 ft 2 ). Based on this, your favourite maritime shop can tell you the quantity you need.

Are your sails worn out? You might find your next sail here: Sails for Sale

If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.

We are always looking for new photos. If you can contribute with photos for Evolution 26 it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us . Criticism helps us to improve.

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evolution 26

Discussion in ' Sailboats ' started by jonny kennedy , Jun 20, 2005 .

jonny kennedy New Member

We bought a evolution 26 designed by Julian Everitt. i have just started racing this boat in Lough Neagh Sailing club and am trying to get information on this boat. Any info will be greatfully accepted. thanks  

asathor Senior Member

http://www.yachtworld.com/core/listing/pl_display_photo.jsp;jsessionid=euKQKXfKgYac?slim=quick&currency=USD&units=Feet&currencyid=100&boat_id=1403569&boatname=108%27+Evolution+Yachts+EVOLUTION+110&photo_name=Photo+1&photo=1&url= here another "evolution"  

CT 249 Senior Member

I don't know much more than that the Evolution was designed as a quarter ton (IIRC) racer/cruiser. I think only a few were built. One, "Absolution", was mis-rated (measurer's mistake) and dominated Solent racing about '81, winning against the flat-out racing quarters. She actually performed quite well even when allowing for the incorrect rating IIRC. If you have access to a library of Seahorse mags back to about '81 you'll find a season summary from Absolution's skipper in the "Coastal round up" they did each year. There was also a report in Seahorse about the measurement error and that may have some comments about the boat, from memory. EDIT; I happened to find my old Seahorse binders. Absolution won Solent Points in her class for two years, so both '80 and '81 Seahorses had reports (about 600+ words) from the skipper. He had some quite detailed info about sheeting angles, sail selection etc BUT (big "but") apparently Absolution was modified from the standard masthead rig to a fractional rig and therefore all that stuff would be of little use to you. If yours is a fractional, post and I may be able to copy out some of his info.  

mine is a mast head rig and it weighs just over 2 ton  

grumpy_gorilla New Member

I have owned an Evolution 26 ("GrumpyGorilla" ) for 10years and race it on the Solent, normally Thursday evening racing around the cans at Royal Lymington Yacht Club. They were originally built at Christchurch (5 miles away) . We have 2 fractional rig 26's ( including "Absolution") ,2 masthead 26's and 1 fractional Evolution 25. The 25 has the same hull as the 26 but a different coachroof allowing more headroom down below. There were various combinations of rigs ,normal masthead, fractional ,whereby the mast was moved 8inches forward of the original step , and an odd-ball fractional rig that was 30inches taller than the standard fractional rig. Apparently , this was popular in places like Poole harbour ,where quite a number of them can be found, where the wind is more "flukey" because of the number is islands. "Absolution" still outstrips any of the other Evolutions and often bigger boats in other classes. I think it was 2000 when she came 18th overall in the "Round the Island Race", not bad out of 1800 boats racing. Christchurch has a larger fleet, as does Poole, and they often have match racing against each other. We are trying to get Lymington involved in this as well. Normally, the fractional rigs go better upwind but the masthead, with bigger spinnakers, reverse the trend downwind. I have got the original Sales "blurb" and will copy it for you. Also Practical Boat Owner did a report November 1981 P55 by Rodger Witt ( you can buy copies from PBO for £3.50) - Interesting reading. Anything specific you need to know , I'll try and answer. regards  

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ive seen the pbo report. ours is goes well up wind and point very well. we are not used to masthead rigging and our looking to find out about setting the rigging in terms of rake in the mast. is there any way you could put me in touch with an owner of a masthead 26 thanks  

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Evolution 26

• Thread starter Rappey
• Start date 5 Feb 2023

Well-known member

This particular boat has a lot of lead ingots filling under the floor all around the keel and forwards. Is this normal for this boat or an addition by an owner ?  

Active member

Normal, it seems: Evolution 26 Julian Everitt is active on Facebook, and would probably be happy to answer questions. He was kind enough to make time to offer me advice on Keel Bolt maintenance recently, when I had one of his designs.  

Ive read all i can via google but not come across anything about under floor ballast. Great idea to ask mr Everitt. I shall take a pic then contact him.  

The review in the link refers to an 800lb keel and a further 800lb ballast glassed into the bottom of the boat I think that's what you're seeing. ... and sailboatdata states 1600lb ballast... so it's likely that that's how the boat was originally built!  

My pal had a Highlander 28 designed by Julian Everitt. It was a larger version of an Evolution 26. It also had removable lead ballast as described which he removed when trailering the boat to reduce the load on the bespoke trailer. He had previously had an Evolution 26 and wanted a slightly larger boat. It went well.  

Yep - that is normal - I have an Evo26  

• 25 Feb 2023

What do people think about drying it out with its keel down ?  

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