The Formosa 46 is a 45.0ft cutter designed by Doug Peterson and built in fiberglass by Formosa Boat Building Co. Ltd. since 1978.

The Formosa 46 is a moderate weight sailboat which is slightly under powered. It is reasonably stable / stiff and has an excellent righting capability if capsized. It is best suited as a heavy bluewater cruising boat.

Formosa 46 sailboat under sail

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Review of Formosa 46

Basic specs..

The Formosa 46 is equipped with a long keel. A long keel provide a better directional stability than a similar boat with a fin keel; on the other hand, better directional stability means also that the boat is more difficult to handle in a harbour with less space.

The boat can only enter major marinas as the draft is about 1.97 - 2.07 meter (6.46 - 6.76 ft) dependent on the load. See immersion rate below.

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 Formosa 46 is 1.63, 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 8.4 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 Formosa 46 is about 318 kg/cm, alternatively 1782 lbs/inch. Meaning: if you load 318 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1782 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 a Ballast 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): 15.90

Maintenance

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 36m 2 (387 ft 2 ). Based on this, your favourite maritime shop can tell you the quantity you need.

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.

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

We are always looking for new photos. If you can contribute with photos for Formosa 46 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.

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FORMOSA 41 Detailed Review

https://images.harbormoor.com/originals/0e2fed33-2ad4-49ac-bfcc-72cd101a15d0

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 FORMOSA 41. Built by Formosa Boat Building Co. Ltd. and designed by William Garden, the boat was first built in 1972. It has a hull type of Long Keel and LOA is 12.47. Its sail area/displacement ratio 13.59. Its auxiliary power tank, manufactured by Perkins, runs on Diesel.

FORMOSA 41 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 FORMOSA 41 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, accomodations, contributions, who designed the formosa 41.

FORMOSA 41 was designed by William Garden.

Who builds FORMOSA 41?

FORMOSA 41 is built by Formosa Boat Building Co. Ltd..

When was FORMOSA 41 first built?

FORMOSA 41 was first built in 1972.

How long is FORMOSA 41?

FORMOSA 41 is 9.75 m in length.

What is mast height on FORMOSA 41?

FORMOSA 41 has a mast height of 13.11 m.

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Spindrift 46

Spindrift 46 is a 45 ′ 0 ″ / 13.7 m monohull sailboat designed by Ron Hillier/D. Peterson (unauthorized) and built by Formosa Boat Building Co. Ltd. starting in 1982.

Drawing of Spindrift 46

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)

The SPINDRIFT 46 was built by Formosa Yachts using the same molds that built the FORMOSA 46. (1980-1984). R. Hillier, of Brisbane Australia, oversaw the building of this yacht which was to be sold in the US for Bristol yachts of Newport Beach CA. For the Australian market, they were called the HILLIER/PETERSON 46. Hillier ran afoul of designer Doug Peterson who filed a law suit. Hillier died and the suit was shelved. Thanks to SPINDRIFT 46 owner, Mark Warburton, kp44.org owner Jeff, and achivist Graham Court.

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COMMENTS

  1. FORMOSA 46

    Yet another altered version of the KELLY-PETERSON 44 (PETERSON 44 CUTTER), first offered in 1976. (Often, as in this case, with out the payment of design royalties.) To make the boat longer, it is said that builders simply added an incremental distance between each station on the original plans.

  2. Formosa 46

    The Formosa 46 is a 45.0ft cutter designed by Doug Peterson and built in fiberglass by Formosa Boat Building Co. Ltd. since 1978. The Formosa 46 is a moderate weight sailboat which is slightly under powered. It is reasonably stable / stiff and has an excellent righting capability if capsized. It is best suited as a heavy bluewater cruising boat.

  3. Formosa 46

    Formosa 46 is a 45′ 0″ / 13.7 m monohull sailboat designed by Doug Peterson (unauthorized) and built by Ta Chiao and Formosa Boat Building Co. Ltd. starting in 1978.

  4. FORMOSA 41

    LENGTH: Traditionally, LOA (length over all) equaled hull length. Today, many builders use LOA to include rail overhangs, bowsprits, etc. and LOD (length on deck) for hull length. That said, LOA may still mean LOD if the builder is being honest and using accepted industry standards developed by groups like the ABYC (American Boat and Yacht Council).

  5. Formosa 46 boats for sale

    1981 Formosa Kelly Peterson 46. US$99,000. ↓ Price Drop. HAREL YACHTS | Saint Martin, Sint Maarten (Dutch part) <. 1. >. * Price displayed is based on today's currency conversion rate of the listed sales price. Boats Group does not guarantee the accuracy of conversion rates and rates may differ than those provided by financial institutions at ...

  6. Review of Formosa 46

    The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Formosa 46 is about 318 kg/cm, alternatively 1782 lbs/inch. Meaning: if you load 318 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1782 lbs cargo on the boat it will sink 1 inch.

  7. PDF FORMOSA 46

    Builders: Formosa Boat Building Co. Ltd. Associations: Kelley-Peterson 44 Cutter Web Site Related Sailboats: SPINDRIFT 46 KELLY-PETERSON 44 Additional Notes Yet another altered version of the KELLY-PETERSON 44 (PETERSON 44 CUTTER), first offered in 1976. (Often, as in this case, with out the payment of design royalties.)

  8. FORMOSA 46: Reviews, Specifications, Built, Engine

    Built by Formosa Boat Building Co. Ltd. and designed by undefined, the boat was first built in 1978. It has a hull type of Fin with rudder on skeg and LOA is 13.72. Its sail area/displacement ratio 14.23. Its auxiliary power tank, manufactured by undefined, runs on undefined. FORMOSA 46 has retained its value as a result of superior building, a ...

  9. Peterson Formosa 46

    Well we are an oddly matched couple in terms of sailing experience. She has owned 4 yachts from 24 up to 50 ft and done lots of coastal racing and cruising in northern NZ, not offshore but in very wild conditions; he has sailed exactly 5 times, but have spent much time in deep sea biological research (a marine biologist by training and trade) and fishing boats.

  10. Formosa Boat Building Co. Ltd.

    Source: sailboatdata.com / CC BY. Suggest Improvements 11 sailboats built by Formosa Boat Building Co. Ltd. Sailboat. Slocum 43. 1981 • 42 ′ 5 ″ / 13 m Sailboat. Formosa 43. 1980 • 41 ′ 9 ″ / 12.8 m Sailboat. Spindrift 46. 1982 • 45 ′ 0 ″ / 13.7 m Sailboat. Formosa 46.

  11. PETERSON 46

    LENGTH: Traditionally, LOA (length over all) equaled hull length. Today, many builders use LOA to include rail overhangs, bowsprits, etc. and LOD (length on deck) for hull length. That said, LOA may still mean LOD if the builder is being honest and using accepted industry standards developed by groups like the ABYC (American Boat and Yacht Council).

  12. Formosa boats for sale

    Formosa is a yacht manufacturer that currently has 24 yachts for sale on YachtWorld, including 2 new vessels and 22 used yachts, listed by experienced boat and yacht brokers mainly in the following countries: United States, Spain, Croatia, Italy and Denmark. The selection of models featured on YachtWorld spans a spectrum of sizes and lengths ...

  13. PDF Formosa 46

    Make: Formosa Model: 46 Length: 46 ft Price: $ 109,000 Year: 1980 Condition: Used Location: Camden, ME, United States Boat Name: Redwings Hull Material: Fiberglass Draft: 6 ft 4 in Number of Engines: 1 Fuel Type: Diesel Number: 957910 Formosa 46 - Redwings Redwings

  14. Formosa sailboats for sale by owner.

    35.5' Endeavour E35 Presently on the hard for winter storage at Morgans Marina, New Jersey Asking $35,000

  15. Formosa 41 boats for sale

    1975 Formosa 41. US$54,065. ↓ Price Drop. AurumYacht | Castelldefels, Barcelona. <. 1. >. * Price displayed is based on today's currency conversion rate of the listed sales price. Boats Group does not guarantee the accuracy of conversion rates and rates may differ than those provided by financial institutions at the time of transaction.

  16. FORMOSA 41: Reviews, Specifications, Built, Engine

    FORMOSA 41 Detailed Review. 1 of 1. 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 FORMOSA 41. Built by Formosa Boat Building Co. Ltd. and designed by William Garden, the boat was first built in 1972. It has a hull type of Long Keel and LOA is 12.47.

  17. Spindrift 46

    Spindrift 46 is a 45′ 0″ / 13.7 m monohull sailboat designed by Ron Hillier/D. Peterson (unauthorized) and built by Formosa Boat Building Co. Ltd. starting in 1982. ... The SPINDRIFT 46 was built by Formosa Yachts using the same molds that built the FORMOSA 46. (1980-1984). ... Source: sailboatdata.com / CC BY. Embed Embed. View Demo.

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  20. Sail Formosa boats for sale

    Find Sail Formosa boats for sale in your area & across the world on YachtWorld. Offering the best selection of Formosa boats to choose from. ... 1981 Formosa Kelly Peterson 46. US$99,000. ↓ Price Drop. HAREL YACHTS | Saint Martin, Sint Maarten (Dutch part) Price Drop; 1980 Formosa 36. US$48,767. ↓ Price Drop. Stay Nautica S.L. | El Masnou ...

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