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.
  • 1 / 8
  • 2 / 8
  • 3 / 8
  • 4 / 8
  • 5 / 8
  • 6 / 8
  • 7 / 8
  • 8 / 8

Seller's Description

These boats are a great family weekender design with full length sleeping berths for five adults, cooking area, sink and a separate head. Excellent use of space. This is the faster version with dagger boards. Her accommodations surpass any boat of her size, while retaining the functionality to be easily trailered and stored out of water. There is 6 of headroom in both hulls and sitting headroom in the bridge deck salon (which converts into a double berth). The dual companionways prevent traffic jams. It is a motor sailor with a light weight brand new Toshiba 20 HP, electric tilt and start, with dashboard steering (can be disconnected in a second for sailing).

She outperforms most monohulls and some multihulls on nearly all points of sail and points exceptionally well, due to her daggerboard design. I can match speed and pointing of a local, new, $1 million touring catamaran in all weather conditions. She is easy to solo sail with a logical layout for the running rigging. She has been kept on a trailer or lift not needing any bottom paint.

This Hirondelle is different and better than all the rest because I have upgraded the weakest points of the boat, completing high quality structural engineered upgrades such as: 1-High strength aluminum rudder pockets with the rudder pins upgraded to heavy duty refrigerator pins. 2-High strength aluminum rudders 3-High strength dagger boards made of Coosa board 4- Fiber glassed in place, backer plates for all of the above 5- All attachment points/holes have been moved up above the water line. 6-Custom bracket on mast for boom gin pole 7-2024 Tohmatsu 20hp 4-cycle long shaft, high thrust prop with electric start/tilt and alternator. Relocated to stern for more cockpit room.

Equipment: Additionally, you have the convenience of wheel steering while motoring or sailing. The captain’s seat is located in the center with everything at arms length to easily solo sail it. 1-Motor throttle located next to steering 2-Traveler Cam cleat is Hobie cat style for quick one hand adjustment 3-Can quickly convert from motoring to sailing by removing 1 pin

The exterior was redone professionally in 2022 at a cost of 11K, duplicating the original anti-skid areas with entire boat sanded, divots filled in, 3 heavy gel coats with sanding in between, and 3 paint coats (documented).

I am too busy with a disabled wife to complete the remaining tasks which are to paint the interior (paint included) and replace the plywood dashboard with Coosa board (included). She is ready to sail. Trailer included with recently changed bearings and tires.

Specs

Designer
Chris Hammond
Builder
Brian Carvill & Assoc. (UK)
Associations
?
# Built
?
Hull
Catamaran
Keel
Twin Centerboard
Rudder
?
Construction
FG

Dimensions

Length Overall
22 11 / 7 m
Waterline Length
20 0 / 6.1 m
Beam
10 0 / 3.1 m
Draft
1 2 / 0.4 m 1 2 / 0.4 m
Displacement
2,300 lb / 1,043 kg
Ballast
?

Rig and Sails

Type
Sloop
Reported Sail Area
250′² / 23.2 m²
Total Sail Area
?
Mainsail
Sail Area
?
P
?
E
?
Air Draft
?
Foresail
Sail Area
?
I
?
J
?
Forestay Length
?

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
1

Calculations

Hull Speed
8.2 kn
Classic: 5.99 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

8.17 knots
Classic formula: 5.99 knots
Sail Area/Displacement
23.0
>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.
22.97
<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
128.1
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
128.06
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
7.9
<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
7.89
<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
3.0
>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
3.03
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

The biggest difference between the Hirondelle Mk I and II was in the rig; being a little under a metre shorter.

This listing is presented by SailboatListings.com. Visit their website for more information or to contact the seller.

View on SailboatListings.com


Embed

Embed

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

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:

©2025 Sea Time Tech, LLC

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