Sailboat specifications
- Last update: 3rd April 2020
X-79's main features
X-79's main dimensions, x-79's rig and sails, x-79's performances, x-79's auxiliary engine, x-79's accommodations and layout, x-79's saloon.
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- Sailboat Guide
X-79 is a 26 ′ 1 ″ / 8 m monohull sailboat designed by Niels Jeppesen and built by X-Yachts between 1979 and 1994.
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)
The X-79 was the first boat built by X-Yachts. Thanks to Paul Keller for providing updated information.
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The X 79 is a 26.12ft fractional sloop designed by Niels Jeppesen and built in fiberglass by X-Yachts between 1979 and 1994.
468 units have been built..
The X 79 is a light sailboat which is a very high performer. It is very stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat.
X 79 for sale elsewhere on the web:
Main features
| Model | X 79 | ||
| Length | 26.12 ft | ||
| Beam | 9.45 ft | ||
| Draft | 4.36 ft | ||
| Country | Denmark (Europe) | ||
| Estimated price | $ 0 | ?? |
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| Sail area / displ. | 24.56 | ||
| Ballast / displ. | 49.81 % | ||
| Displ. / length | 142.93 | ||
| Comfort ratio | 10.21 | ||
| Capsize | 2.63 |
| Hull type | Monohull fin keel with spade rudder | ||
| Construction | Fiberglass | ||
| Waterline length | 21 ft | ||
| Maximum draft | 4.36 ft | ||
| Displacement | 2965 lbs | ||
| Ballast | 1477 lbs | ||
| Hull speed | 6.14 knots |
We help you build your own hydraulic steering system - Lecomble & Schmitt
| Rigging | Fractional Sloop | ||
| Sail area (100%) | 316 sq.ft | ||
| Air draft | 0 ft | ?? | |
| Sail area fore | 131.56 sq.ft | ||
| Sail area main | 184.19 sq.ft | ||
| I | 29.90 ft | ||
| J | 8.80 ft | ||
| P | 32.60 ft | ||
| E | 11.30 ft |
| Nb engines | 1 | ||
| Total power | 0 HP | ||
| Fuel capacity | 0 gals |
Accommodations
| Water capacity | 0 gals | ||
| Headroom | 0 ft | ||
| Nb of cabins | 0 | ||
| Nb of berths | 0 | ||
| Nb heads | 0 |
Builder data
| Builder | X-Yachts | ||
| Designer | Niels Jeppesen | ||
| First built | 1979 | ||
| Last built | 1994 | ||
| Number built | 468 |
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Review of X-79
Basic specs.
An outboard motor is often used on this boat. In that case X-79 will typically require a power of 3 - 4 hp, alternatively 71 - 85 lbs thrust if you prefer an electrical motor. Electric outboards are becoming popular for sailboat owners who want clean instant power with less noise and no exhaust fumes.
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 X-79 is 2.48, 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 X-79 is about 123 kg/cm, alternatively 691 lbs/inch. Meaning: if you load 123 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 691 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 Displacement Length Ratio?
What is SA/D (Sail Area Displacement ratio)?
What is Relative Speed Performance?
Maintenance
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.
| Usage | Length | Diameter | ||
| Mainsail halyard | 26.3 m | (86.3 feet) | 8 mm | (5/16 inch) |
| Jib/genoa halyard | 26.3 m | (86.3 feet) | 8 mm | (5/16 inch) |
| Spinnaker halyard | 26.3 m | (86.3 feet) | 8 mm | (5/16 inch) |
| Jib sheet | 7.9 m | (26.0 feet) | 10 mm | (3/8 inch) |
| Genoa sheet | 7.9 m | (26.0 feet) | 10 mm | (3/8 inch) |
| Mainsheet | 19.9 m | (65.1 feet) | 10 mm | (3/8 inch) |
| Spinnaker sheet | 17.5 m | (57.3 feet) | 10 mm | (3/8 inch) |
| Cunningham | 3.5 m | (11.5 feet) | 8 mm | (5/16 inch) |
| Kickingstrap | 7.0 m | (23.0 feet) | 8 mm | (5/16 inch) |
| Clew-outhaul | 7.0 m | (23.0 feet) | 8 mm | (5/16 inch) |
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BoatNews.com
My second hand boat / X-79: A reasonable sailboat to introduce your children to sailing
A sailboat to share the passion of family sailing
When Richard set out to buy a boat in 2021, it was not his first sailboat . After having a Muscadet for several years, he had a Grand Soleil 40 in the Mediterranean, but the Lorient native now has his sights set on another program: "I wanted to take over a boat to introduce my children to sailing. I thought of taking over a Muscadet, but in good condition, they are quite expensive these days. With the Grand Soleil 40, I'd seen how impressive the size of the boat can be. So I was aiming for something smaller
A rather Nordic boat
Richard concedes a soft spot for half-tonners, but it's hard to find them in good condition. In 2021, the market is tight, and Richard is looking over a wide geographical area: "I had identified the X-79, but it's hard to find in France, as it's more common in the Baltic and northern Europe. I saw an advert on the internet in Poland. It seemed to be in good condition and well equipped. So I appointed an expert in Poland and carried out the transaction remotely. The boat was ?16,000 with trailer, to which I added ?2,000 for the survey and transport back to Brittany ."
An iconic yacht from X Yachts
Visit X-79 the first model of the danish shipyard X Yachts is inseparable from its history, and has greatly contributed to its reputation. Launched in 1979, the 7.96 m long yacht was a great success, with almost 500 units sold between 1979 and 1994, competing with the J24s at the time, with superior habitability. Designed by the shipyard's iconic naval architect, Niels Jeppesen, the boat boasts a surface area of 38.9 m2 upwind and 74 m2 downwind, for just 1.35 T lightship.
The well-protected cockpit features two beautiful cockpit benches for a yacht of her size, and the interior layout follows the usual pattern for boats of this size at the time.
The saloon seating extends into a coffin berth under the cockpit or a storage area, while a couple can sleep in the forepeak.
Between the two, at the foot of the mast, you'll find a small sink on one side and a map table on the other, where you can add your camping stove.
Under the cockpit floor, a vast space is available for storage, making it easy to remove the step from the companionway.
A high-performance small sailboat
After a first summer enjoying the boat, Richard decided to invest to make his small boat big: " I thought about going bigger, but the draught issues didn't suit me for sailing in Southern Brittany . I added a fixed autopilot , 2 solar panels on the aft hatches and a water cow. And I invested in some nice sails. One of the boat's first qualities is that it's fast in light airs. It works well, and when I'm sailing single-handed, I can get up to 10 knots downwind and quickly make 6 to 7 knots upwind."
Richard concedes that on a well-rigged sailboat, you have to reduce the canvas pretty quickly. He doesn't see the problem of low and runabout rigging: "You either like it or you don't. I find it interesting to have extra things to sort out and it's not that complicated."
Warm interior
For the yachtsman, the 1980s interior adds to the warmth of the cabin, compared with the white interiors of modern fast yachts. And the cabin meets his expectations of family cruising: "We manage to put 2 children head to toe on the rear bunks and the parents in the front tip, although I have to admit that managing the latter's diapers can be tricky!"
For Richard, the X-79 has the faults of its qualities - lightness and size - but they're not really faults at all! : "Small boat, small problem. My best sailing memories are on my Muscadet and not on my Grand Soleil 40."
X-yachts X-79 resources
| I've added a PDF version of the by Niels Jeppesen. The text (OCR-ed) is in . Proper transcription and translation into an would be nice! |
- Assembly/build manual
- German X79 Class association rules from 2002 (In English, source: x79.de)
- Some commercial brochures: first second
- X-79 specification february 1991
- Sample polar diagram .
Trim guides
- The most comprehensive trim guide ( local copy ) I've found is the one from North Sails in Denmark. (in Danish)
- Quantum Sails has a section (in Danish) as well, but more brief. ( local copy )
- Original (?) typewritten trim guide from Nils Jeppesen In German, from x79.de
- SWE-67 pages (in swedish)
- Danish X-79 club
- X-79 on Danish wikipedia
- North Sails recommended X-79 sails (dead as of 2018-05-18)
- X-79 on sailboatdata.com
Mirror this site!
Much content is originally mirrored from www.x79.dk . As of December 2015 x79.dk is dead, and the swedish x79.nu is also offline now. Yachts last longer than web sites! Please fetch a full copy (or a git clone ) of the content and make it available for future X79 owners.
Last updated 2018-05-18 by Lasse Karstensen.
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-scanboat-picture-25730859_thumb.JPG "x 79 sailboat")
-scanboat-picture-25730860_thumb.JPG "x 79 sailboat")
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40 to 50 indicates a heavy bluewater boat; over 50 indicates an extremely heavy bluewater boat. Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam^1.33), where displacement is expressed in pounds, and length is expressed in feet. Capsize Screening Formula (CSF): Designed to determine if a boat has blue water capability.
The X-79 is a 26'1" (7.96m) racer-cruiser sailboat designed by Niels Jeppesen (Denmark). She was built between 1979 and 1994 by X-Yachts (Denmark) with 468 hulls completed. X-79's main features
The refurbishing process of X-79 number 1. In the early Summer of 2018, Birger Hansen and Lars Jeppesen picked up the very first model of X-79 on Jersey in the UK. The boat was a gift to X-Yachts Headquarters from the UK Dealer of X-Yachts, Conor Fanning. During the Autumn of 2018, the refurbishing process of the exterior was started up by ...
X-79 is a 26′ 1″ / 8 m monohull sailboat designed by Niels Jeppesen and built by X-Yachts between 1979 and 1994. Great choice! Your favorites are temporarily saved for this session. Sign in to save them permanently, access them on any device, and receive relevant alerts. ... X-79 is a 26 ′ 1 ″ / 8 m monohull ...
The first X-79 ever built was sold. The three boat builders from Haderslev went back home without a boat. Watch the founders step on board the first X-79 40 years after the launch. More to come - stay tuned! The 40th Anniversary paper book is now for sale - Read all about the X-Yacht journey - 150 pages of history, models and pure X-moments.
The first boat, the X-79, got its name due to the length of the boat, which was 7.9 m (7.96 m), and because it was launched in the year of 1979. The boat was the Danish answer to J/24, Albin Express, and Maxi 80 Racer and has won many regattas since the first launch. A total of 468 X-79 were built between 1979 and 1994.
X-79 is a 7.93-metre (26.0 ft) sailboat class designed by Niels Jeppesen and built in about 500 copies. History. Niels Jeppesen designed the X-79 to compete in the Sjælland Rundt. See also. X-99; Links. X-79 resource site; References This page was last ...
Boat Shows; Charter; Service Center; Brokerage; Contact. Back; X-Yachts Denmark X-Yachts A/S. Fjordagervej 21 6100 Haderslev Denmark. Tel: +45 74 52 10 22 Fax: +45 ... X-79. The X-79 is no longer in production. To see an overview of the current range please visit the Yachts page.
The X 79 is a 26.12ft fractional sloop designed by Niels Jeppesen and built in fiberglass by X-Yachts between 1979 and 1994. 468 units have been built. The X 79 is a light sailboat which is a very high performer. It is very stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat.
perfect sailing experience. 879 During the recent years X-79 has gained afoot- ing as a very exciting ra- cerciass. X-79 KLUB" is every year to- gether with "INTERNA- TIONÅL X SEVENTY- NINE ASSOCIA TION" (IXSNÅ) arranging large races with participation of 30-40 boats, e.g. the
In 1979 she spread her wings, flew away and laid the foundation of X-Yachts.The 3 founders of X-Yachts, Birger Hansen and Niels & Lars Jeppesen have test sai...
The Motion Comfort Ratio for X-79 is 12.1. Low High 12% 0 50 100. Comparing this ratio with similar sailboats show that it is more comfortable than 12% of all similar sailboat designs. This is a comfort value significantly below average.
The very first boat produced by X-Yachts is back at the yard. The first X-79, produced in 1979, is now undergoing a total make-over and will be presented at ...
Blue Water Surf Value Rank (BWSVR) 7246. Capsize Comfort Value Rank (CCVR)
An iconic yacht from X Yachts. Visit X-79 the first model of the danish shipyard X Yachts is inseparable from its history, and has greatly contributed to its reputation. Launched in 1979, the 7.96 m long yacht was a great success, with almost 500 units sold between 1979 and 1994, competing with the J24s at the time, with superior habitability.
X-79 Class Association (DEN) Related Sailboats: Sort by: ... 1 Sailboats / Per Page: 25 / Page: 1. 0 CLICK to COMPARE . MODEL LOA FIRST BUILT FAVORITE COMPARE; X-79: 26.12 ft / 7.96 m: 1979: ShipCanvas. KiwiGrip. Bruntons. Rudder Craft. Pelagic Autopilots. EWOL. SBD App Non-BR ...
X-yachts X-79 is a sailing yachts made in the 1980s. Here are some files/resources on it I've collected over the years. ... North Sails recommended X-79 sails (dead as of 2018-05-18) X-79 on sailboatdata.com; Mirror this site! Much content is originally mirrored from www.x79.dk. As of December 2015 x79.dk is dead, and the swedish x79.nu is also ...
In the summer of 2022, once the Baltic has de-iced and the refitting works has been completed, RelaX will make the crossing of the Baltic: from Finland, sailing south along the Swedish coasts, and arriving to Denmark, up to Haderslev, X-Yacths yard, where this amazing story began. From there my wish was to transport the boat by road to Italy.
Used Boat, Regatta Boat, Sailing Yacht. X-Yachts x-79. Save as favorite. EUR 5.900,-1980 Year Built; 7.90 m x 2.88 m Length x Beam; 1.30 m Draught; 1'500 kg Displacement; Tohatsu, Außenborder Engine; ... Verkaufe eine x-79 Segelnummer 79 Baunummer 79 Großsegel, Genua, 3 Spinnaker Fock neu Baumpersenning neu
Description. Description S / Y EXOCET FOR SALE X-79 class yacht, monotypic, manufactured by the Danish shipyard X-Yachts Very fast yacht, winner of, among others, the Polish Sea Sailing Championships Year of construction 1982 Serial number 86 L = 7.89 m Lw = 6.94 m B = 2.87 m D = 1.34 m V = 1.55 t S = 36.625 m ^ 2 It does not require additional investment outlays, ready for navigation after ...
Go to Sailing Texas classifieds for current sailboats for sale . 1985 X-79 Made in Denmark Hull was recently painted. Bottom is in good condition, no blisters, just needs sanding and painting. Keel is in great shape. Kevlar main in excellent condition. This main alone is worth over $1,500. Kevlar 130 in good condition 2 spinnakers
Boats for sale - 17,043 ads. Sellers and buyers meet on "Boats for sale".It is possible to search more than 14.000 boats from across Europe. Once you have made your searches and are logged in, you have the option to save your search for a boat and create an ad agent. Then you will automatically be informed when your dream boat is for sale on scanboat.
MOBILE, Ala. - The boathouse and lift for fire boat 2 which was introduced last September is complete.According to Mobile-Fire-Rescue, the boat is just shy of 43 feet in length, runs 40 miles an ...
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Gist said they loaded 27 dogs into the boat for the first load and took them to shore. They then went back and rescued 11 more. A total of 38 dogs were rescued.
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The restart of the X-79! It all started 43 years ago, when the X-79 spread her wings, flew away and laid the foundation of X-Yachts. The X-79 was a successful Northern European one-design class, that is still active in a few countries. Together with X-Yachts CEO Kræn Nielsen, Jens Hedegaard from Kolding wants to restart the Danish X-79 club ...
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