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Seller's Description

Year Length Beam Draft Location Price

1981 30′ 10’3′ 5’6′ Georgia $9,500

1981 Kirby 30

Manufactured by Mirage Yachts

In Excellent Condition with a Huge Selection of Racing Sails in Very Good Condition and Lots of Updated Hardware w/Diesel Engine

ACCOMMODATIONS:

Opposing settees in main cabin Porta Potti forward of bulkhead Two Quarter Berths Propane Stove, sink and water tank Pioneer AM/FM/CD player with 4 speakers

SAILS/RIGGING:

New Mast, Standing Rigging and Chain Plates in 2014 Running Rigging in Excellent Condition Quantum Dacron Racing Mainsail 2015 Quantum Fusion MR 5000 Genoa (105% Battened) 2015 Quantum Fusion MR 5000 Genoa Heavy #1 (145%) 2016 Quantum Fusion MR 5000 Genoa Light # 1 (150%) 2018 UK Carbon/Aramid Genoa 155% 2004 (Good Condition) Asymmetrical Spinnaker (2010) New Condition Symmetrical Spinnaker (2010) New Condition Spinnaker Pole Original Dacron #1,2,3 in Good Condition Practice Sails: 155% composite, 135% composite, 155% drifter, symmetrical spinnaker Sail Cover 2016 Lewmar Self Tailing Winches 2017 Lewmar Lead System for 105% Genoa 2015 Lewmar Traveler 2015 Garhauer Jib Lead Cars (adjustable) 2021 Garhauer Spinnaker Blocks 2021 Lewmar Main Block 2015

Very Clean & Ready to Race

DECK/ELECTRONICS:

Life Jackets Winch Handle Anchor/Line Solar Vent Battery (AGM) Fall 2020 VHF Radio Satellite Radio Datamarine Instrument Cluster Depth/Speed/AWS Compasses Tiller Pilot TP 100 Trucharge Battery Charger Automatic Bilge Pump

Specs

Designer
Bruce Kirby
Builder
Mirage Yachts Ltd
Associations
?
# Built
195
Hull
Monohull
Keel
Fin
Rudder
Spade
Construction
FG

Dimensions

Length Overall
29 7 / 9 m
Waterline Length
23 5 / 7.2 m
Beam
10 2 / 3.1 m
Draft
5 6 / 1.7 m
Displacement
5,350 lb / 2,427 kg
Ballast
2,300 lb / 1,043 kg

Rig and Sails

Type
Sloop
Reported Sail Area
434′² / 40.3 m²
Total Sail Area
434′² / 40.4 m²
Mainsail
Sail Area
251′² / 23.4 m²
P
37 2 / 11.4 m
E
13 5 / 4.1 m
Air Draft
?
Foresail
Sail Area
183′² / 17 m²
I
34 6 / 10.5 m
J
10 7 / 3.2 m
Forestay Length
36 1 / 11 m

Auxilary Power

Make
BMW orYanmar
Model
?
HP
?
Fuel Type
Diesel
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
7.9 kn
Classic: 6.49 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

7.9 knots
Classic formula: 6.49 knots
Sail Area/Displacement
22.7
>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.
22.7
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
43.0
>40: stiffer, more powerful

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

42.97
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
184.3
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
184.27
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
14.6
<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
14.63
<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
2.3
>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
2.34
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

Thanks to Jeff H. for providing corrections.

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

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