kirby 30 sailboat data

The Kirby 30 is a 29.67ft fractional sloop designed by Bruce Kirby and built in fiberglass by Mirage Yachts Ltd (CAN) since 1981.

195 units have been built..

The Kirby 30 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.

Kirby 30 for sale elsewhere on the web:

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KIRBY 30 Detailed Review

If you are a boat enthusiast looking to get more information on specs, built, make, etc. of different boats, then here is a complete review of KIRBY 30. Built by Mirage Yachts Ltd (CAN) and designed by Bruce Kirby, the boat was first built in 1981. It has a hull type of Fin w/spade rudder and LOA is 9.04. Its sail area/displacement ratio 22.77. Its auxiliary power tank, manufactured by BMW orYanmar, runs on Diesel.

KIRBY 30 has retained its value as a result of superior building, a solid reputation, and a devoted owner base. Read on to find out more about KIRBY 30 and decide if it is a fit for your boating needs.

Boat Information

Boat specifications, sail boat calculation, rig and sail specs, auxillary power tank, contributions, who designed the kirby 30.

KIRBY 30 was designed by Bruce Kirby.

Who builds KIRBY 30?

KIRBY 30 is built by Mirage Yachts Ltd (CAN).

When was KIRBY 30 first built?

KIRBY 30 was first built in 1981.

How long is KIRBY 30?

KIRBY 30 is 7.16 m in length.

What is mast height on KIRBY 30?

KIRBY 30 has a mast height of 11.35 m.

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Engineering:Kirby 30

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The Kirby 30 is a Canadian racing sailboat , that was designed by Bruce Kirby and first built in 1981. [1] [2] [3] [4]

The Kirby 30 design was a follow-on to the Kirby 25 and it was later developed into the Mirage 30 SX in 1985. [1] [4] [5]

• 1 Production
• 3 Operational history
• 5 References

The boat was built by Mirage Yachts in Canada , starting in 1981. The company completed 195 examples, but it is now out of production. [1] [4] [5]

The Kirby 30 is a small recreational racing keelboat , built predominantly of fibreglass. It has a fractional sloop rig, an internally-mounted spade-type rudder and a fixed fin keel . It displaces 5,350 lb (2,427 kg) and carries 2,300 lb (1,043 kg) of ballast. [1] [2] [4]

The boat has a draft of 5.50 ft (1.68 m) with the standard keel and is fitted with a BMW or Yanmar diesel engine. [1] [4]

The boat has a PHRF racing average handicap of 135 with a high of 142 and low of 132. It has a hull speed of 6.5 kn (12.04 km/h). [2] [4]

Operational history

In a 1980 review in Canadian Yachting, John Turnbull described the design as, "Not your average thirty. If you need standing headroom. forget it. But if you love to sail, and sail fast". [6]

• List of sailing boat types

Related development

• Mirage 30 SX

Similar sailboats

• C&C 30 Redwing
• Catalina 30
• Catalina 309
• Grampian 30
• Hunter 29.5
• Hunter 30-2
• Santana 30/30
• ↑ 1.0 1.1 1.2 1.3 1.4 Browning, Randy (2017). "Kirby 30 sailboat specifications and details" . sailboatdata.com . https://sailboatdata.com/sailboat/kirby-30 . Retrieved 2 April 2017 .  
• ↑ 2.0 2.1 2.2 InterVisionSoft LLC (2017). "Sailboat Specifications for Kirby 30" . Sailing Joy . http://www.sailingjoy.com/sailboat_specs/sailboat_specs/view/695/kirby-30 . Retrieved 2 April 2017 .  
• ↑ Browning, Randy (2017). "Bruce Kirby" . sailboatdata.com . https://sailboatdata.com/designer/kirby-bruce . Retrieved 2 April 2017 .  
• ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Sea Time Tech, LLC (2022). "Kirby 30" . sailboat.guide . https://sailboat.guide/mirage/kirby-30 .  
• ↑ 5.0 5.1 Browning, Randy (2017). "Mirage Yachts Ltd (CAN) 1972 - 1989 Mirage Yachts Ltd (CAN) 1972-1989" . sailboatdata.com . https://sailboatdata.com/builder/mirage-yachts-ltd-can . Retrieved 27 February 2017 .  
• ↑ Turnbull, John (1980). "Kirby 30" . Canadian Yachting . Archived from the original on 14 July 2017 . https://web.archive.org/web/20170714023144/http://www.canadianyachting.ca/boat-reviews/95-one-design/3533-kirby-30 .  
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Review of Kirby 30

Basic specs..

The boat is typically equipped with an inboard Yanmar diesel engine.

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 Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 6.5 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 Kirby 30 is about 152 kg/cm, alternatively 854 lbs/inch. Meaning: if you load 152 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 854 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 L/B (Length Beam Ratio)?

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.

This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.

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• Sailboat Guide

1981 Mirage Kirby 30

• Description

Seller's Description

Standard features

1981 Kirby 30

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

“We wanted to design a pretty little boat that would be fast regardless of rating, says designer Bruce Kirby. My personal interest, says builder Dick Steffan, is how well the boat balances and steers. We didnt want a fast boat with a lot of peculiar habits, we wanted a fast boat that could easily be sailed up to its potential. They delivered on that design brief. The Kirby 30 has a Lake Lanier PHRF rating of 132 and handles like a sports car.

Very Clean and Ready to Race

Improvements to the hull, deck, rigging, engine, or interior

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

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

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)

Thanks to Jeff H. for providing corrections.

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

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General Data

See also: boats for sale.

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Overall length:

Waterline length:, maximum beam:, straightening:, sail details mq.

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• Thread starter bruce webb
• Start date Aug 3, 2009
• Forums for All Owners
• Ask All Sailors

i own a kirby 30 that has been dismasted. i have another piece in which to repair. these kirby 30's have a history of dismasting, mostly due to rig failure and/or running backstay failure (not using it fast enough). i want to re-rig the mast, possibly making it a double spreader rig and adding another lower, lower on the mast. i would appreciate it if anyone has any info on k-30's or some advice on this project. my boat was deck stepped but i am going to add enough to keel step it. it has a isomat ng 31 mast or it is a cinkel kockoff. i am going to sleeve it, rivet, and alunimum weld the seam. any suggestions?  

peregrine red

bruce webb said: i own a kirby 30 that has been dismasted. i have another piece in which to repair. these kirby 30's have a history of dismasting, mostly due to rig failure and/or running backstay failure (not using it fast enough). i want to re-rig the mast, possibly making it a double spreader rig and adding another lower, lower on the mast. i would appreciate it if anyone has any info on k-30's or some advice on this project. my boat was deck stepped but i am going to add enough to keel step it. it has a isomat ng 31 mast or it is a cinkel kockoff. i am going to sleeve it, rivet, and alunimum weld the seam. any suggestions? Click to expand

Hi Bruce, Did you respond to my ad on Kijiji? I have the spinnaker for sale and received your inquiry. However, when I tried to respond, your email was returned as undeliverable. Please email directly at [email protected] . Regards, Dan Burke Belle River, Ontario  

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Kirby - Sailboat Data, Parts & Rigging

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