bowman 45 sailboat

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The Bowman 45 Sailboat Specs & Key Performance Indicators

The  Bowman 45, an aft-cockpit cutter,  was designed by Chuck Paine and built in the UK by Rustler Yachts Ltd.

Published Specification for the Bowman 45

Underwater Profile:  Fin keel & skeg-hung rudder

Hull Material:  GRP (Fibreglass)

Length Overall:  45'2" (13.8m)

Waterline Length:  36'6" (11.1m)

Beam:  13'0" (4.0m)

Draft:  5'9" (1.8m)

Rig Type:  Cutter

Displacement:  24,500lb (11,113kg)

Designer:  Chuck Paine Ltd

Builder:  Rustler Yachts Ltd (UK)

Published Design Ratios for the Bowman 45

1. Sail Area/Displacement Ratio:  17.6

• Less than 16 would be considered under-powered;
• 16 to 20 would indicate reasonably good performance;
• Over 20 suggests relatively high performance.

2. Ballast/Displacement Ratio:  44.0

• Under 40: less stiff, less powerful
• Over 40: stiffer, more powerful

3. Displacement/Length Ratio:  225

• Under 100: Ultralight
• 100 to 200: Light
• 200 to 275: Moderate
• 275 to 350: Heavy
• Over 350: Ultraheavy

4. Comfort Ratio:  31.8

• Under 20 indicates a lightweight racing boat
• 20 to 30 indicates a coastal cruiser
• 30 to 40 indicates a moderate offshore cruising boat
• 40 to 50 indicates a heavy offshore boat
• Over 50 indicates an extremely heavy offshore boat

5. Capsize Screening Formula:   1.8

• Under 2.0 (the lower the better): Better suited for ocean passages
• Over 2.0: Less suited for ocean passages

read more about these Key Performance Indicators...

Summary Analysis of the Design Ratios for the Bowman 45

1. A Sail Area/Displacement Ratio of 17.6 suggests that the Bowman 45 will, in the right conditions, approach her maximum hull speed readily and satisfy the sailing performance expectations of most cruising sailors.

2. A Ballast/Displacement Ratio of 44 means that the Bowman 45 will stand up well to her canvas in a blow, helping her to power through the waves.

3. A Displacement/Length Ratio of 225, tells us the Bowman 45 is a moderate displacement cruiser, which means she'll carry all your cruising gear without it having a dramatic effect on her performance. Most of today's sailboats intended for offshore cruising fall into this displacement category.

4. Ted Brewer's Comfort Ratio of 31.8 suggests that crew comfort of a Bowman 45 in a seaway is similar to what you would associate with the motion of a moderate bluewater cruising boat - a predictable and acceptable motion for most seasoned sailors.

5. The Capsize Screening Formula (CSF) of 1.8 indicates that a Bowman 45 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0. 

The Bowman 45: A Classic Ocean-Cruising Yacht

Accommodation

The Bowman 45 has a spacious and well-crafted interior that can accommodate up to six people in comfort. The layout varies depending on the owner's choice, but typically there are two or three sleeping cabins, a large saloon, a galley, a navigation station, and one or two heads. Some of the options include:

• A forward cabin with a V-berth or an island double berth, and an ensuite head with shower;
• A master cabin aft with a centerline double berth, and an ensuite head with shower;
• A guest cabin with upper and lower single berths, or a double berth;
• A U-shaped galley to port or starboard, with a three-burner stove, an oven, a fridge, a freezer, and ample storage and counter space;
• A navigation station opposite the galley, with a large chart table, instruments, and electrical panel;
• A saloon with a U-shaped settee and a drop-leaf table to port or starboard, and a straight settee opposite. The settees can be used as single berths if needed.

The interior is finished in teak or cherry woodwork, with white bulkheads and overheads. The upholstery is durable and comfortable, and the lighting is warm and cozy. The ventilation is excellent, with opening ports, hatches, and dorade vents. The headroom is generous throughout, ranging from 6'4" to 6'8".

Rigging and Sails

The Bowman 45 has a Bermudan cutter rig. The mast is aluminum, with two sets of spreaders and stainless-steel standing rigging. The boom is also aluminum, with slab reefing or in-mast or in-boom furling. The sail area is 1096 ft³, which gives the boat a sail area/displacement ratio of 17.6. This means that the boat has reasonably good performance under sail, especially in moderate to strong winds.

The cutter rig allows for various sail combinations, depending on the wind and sea conditions. The typical sail inventory includes:

• A mainsail with three reefs;
• A roller-furling genoa;
• A staysail on a self-tacking boom;
• A spinnaker or a gennaker;
• A storm jib and a trysail.

The sails are controlled by winches and clutches on the mast and in the cockpit. The cockpit has two primary winches for the genoa sheets, two secondary winches for the staysail sheets, and two more winches for the main halyard, reefing lines, vang, outhaul, etc.

Hull and Deck

The Bowman 45 has a solid fiberglass hull with a fin keel and a skeg-hung rudder. The hull is heavily built and well ballasted, giving the boat a displacement of 24,500 lb and a ballast/displacement ratio of 44. This means that the boat is stiff and stable in rough seas, and can carry a lot of cruising gear without compromising its performance.

The deck is also fiberglass, with teak or synthetic teak overlay. The deck has wide side decks for easy movement forward and aft. The bow has a large anchor locker with space for two anchors and chain. The stern has a lazarette locker for storing fenders, lines, etc.

The cockpit is aft, with a pedestal-mounted wheel steering system. The cockpit has high coamings for protection from spray and waves. The cockpit seats are long enough to lie down on. There is also a folding cockpit table for dining al fresco.

The boat has various safety features, such as:

• A strong skeg-hung rudder that can withstand grounding or collision;
• A stainless steel pulpit, pushpit, stanchions, and lifelines;
• A dodger and a bimini for shelter from sun and rain;
• A liferaft mounted on the coachroof or the stern rail;
• A manual or electric bilge pump;
• A fire extinguisher and a smoke detector.

Performance and Handling

The Bowman 45 is designed for ocean cruising, and has proven itself in many long-distance voyages. The boat has a good seakeeping ability, with a comfortable and predictable motion in a seaway. The boat can handle heavy weather well, with its cutter rig and reefing system. The boat is also easy to handle by a small crew or even single-handed, with its self-tacking staysail and roller-furling genoa.

The boat's weak point is its windward performance, which is uninspiring. The boat has a relatively low aspect ratio keel, which reduces its pointing ability. The boat also has a lot of wetted surface, which increases its drag. The boat may need help from the engine in light winds or when tacking against the current.

The boat's engine is a 75 hp Yanmar diesel, which gives the boat a cruising speed of about 7 knots and a maximum speed of about 8 knots. The boat has a fuel tank capacity of 100 gallons, which gives the boat a range of about 700 nautical miles at cruising speed. The boat also has a water tank capacity of 150 gallons, which can be supplemented by a watermaker if needed.

Pros and Cons

The Bowman 45 is a classic ocean-cruising yacht that offers:

• A spacious and well-crafted interior with various layout options;
• A cutter rig that allows for versatile sail combinations;
• A solid and seaworthy hull that can withstand rough seas;
• A comfortable and stable motion in a seaway;
• An easy handling by a small crew or single-handed.

However, the Bowman 45 also has some drawbacks and limitations, such as:

• A high purchase cost compared to mass-production boats;
• A poor windward performance that may require motor assistance;
• A moderate displacement that may limit its speed potential;
• A traditional style that may not appeal to everyone.

The above text was drafted by sailboat-cruising.com using GPT-4 (OpenAI’s large-scale language-generation model) as a research assistant to develop source material; we believe it to be accurate to the best of our knowledge.

Other sailboats in the Bowman range include:

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Review of Bowman 45

Basic specs., 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 Bowman 45 is 1.30, indicating that this boat could - if evaluated by this formula alone - 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 8.0 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 Bowman 45 is about 221 kg/cm, alternatively 1238 lbs/inch. Meaning: if you load 221 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1238 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?

SA/D (Sail Area Displacement ratio) Indicates how fast the boat is in light wind: - Cruising Boats have ratios 10-15 - Cruiser-Racers have ratios 16-20 - Racers have ratios above 20 - High-Performance Racers have ratios above 24 Sail-area/displacement ratio (SA/D ratio): 7.36

Maintenance

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 is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.

We are always looking for new photos. If you can contribute with photos for Bowman 45 it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us . Criticism helps us to improve.

• Yachting Monthly
• Digital edition

• July 9, 2009

This cutter-rigged yacht was Chuck Paine’s third design for Bowman, and his hallmarks can be seen all over the boat. Many were fi tted out to an owner’s custom requirements – and one even had a piano installed! As one would expect from a Bowman, she is a seaworthy boat with a solid and well-crafted interior, and a successful ocean cruiser. Her windward performance was uninspiring, however.

LOA 13.78m (45ft 2in), LWL 11.14m (36ft 6in), beam 3.96m (13ft), draught 1.75m (5ft 9in), displacement 11,113kg (24,500lb). Price guide: £220,000 to £240,000. YM Test Report June 1995.

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Rustler bowman 45.

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A timeless classic from Chuck Paine, the Bowman 45 is an outstanding long distance cruising yacht boasting many of the highly praised interior features of her bigger sister the Bowman 48. Offering genuine luxury accommodation, the Bowman 45 has been developed to explore the oceans of the world in safety and comfort while giving her owner complete confidence in her ability to handle any conditions she may encounter.

Built by Rustler Yachts to the highest of standards in 2006/7. She was subsequently refitted at Rustler in 2022.

Not to be missed if you are contemplating that big adventure, or seek a commodious and comfortable passage maker.

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