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.

We will occasionally send you relevant updates. You can opt out or contact us any time.

Dragonfly 40 Touring

2020

Dragonfly 40 Touring is a 40′ 8″ / 12.4 m trimaran sailboat designed by Jens Quorning and Steen Olsen and built by Quorning Boats starting in 2020.

Designer
Jens Quorning and Steen Olsen
Builder
Quorning Boats
Associations
?
# Built
?
Hull
Trimaran
Keel
Centerboard
Rudder
?
Construction
FG

Dimensions

Length Overall
40′ 8″ / 12.4 m
Waterline Length
37′ 8″ / 11.5 m
Beam
27′ 6″ / 8.4 m
Draft
2′ 3″ / 0.7 m — 7′ 2″ / 2.2 m
Displacement
12,790 lb / 5,800 kg
Ballast
?

Rig and Sails

Type
Fractional Sloop
Reported Sail Area
969′² / 90 m²
Total Sail Area
?
Mainsail
Sail Area
?
P
?
E
?
Air Draft
61′ 8″ / 18.8 m
Foresail
Sail Area
?
I
?
J
?
Forestay Length
?

Auxilary Power

Make
?
Model
?
HP
40
Fuel Type
Diesel
Fuel Capacity
40 gal / 150 l

Accomodations

Water Capacity
58 gal / 220 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
11.9 kn
Classic: 8.23 kn

Hull Speed

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.

Formula

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.

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

11.89 knots
Classic formula: 8.23 knots
Sail Area/Displacement
28.4
>20: high performance

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.

Formula

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.
28.35
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
?

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.

Formula

Ballast / Displacement * 100

?
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
106.3
100-200: light

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.

Formula

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
106.28
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
6.1
<20: lightweight racing boat

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.

Formula

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
6.13
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
4.7
>2.0: better suited for coastal cruising

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.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
4.71
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

Swing wing Trimaran. LOA folded: 14.17 m / 46.5 ft. Beam folded: 4.0 m / 13.12 ft
Optional 57 hp motor.
The Dragonfly 40 is available in four versions:
-Touring version with self-tacking jib (Standard).
-Ultimate version has a taller and more powerful rig and larger overlapping furling headsail (photo above).
-C Ultimate Carbon version with floats-, beams-, forward and aft structual main hull bulkheads-, centerboard trunk and under deck cabin mast support in carbon Pre-Preg system cured in Autoclav.
-C Performance version is similar to the C Ultimate version, but with an even taller and more powerful rig and sails.

Suggest Improvements
Source: sailboatdata.com / CC BY
Embed

Embed

View Demo

Embed this page on your own website by copying and pasting this code.

For Sale

Have a sailboat to sell?
List it for free and it will show up here.

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.

We will occasionally send you relevant updates. You can opt out or contact us any time.
Measurements:

©2024 Sea Time Tech, LLC

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.