Mylius M66RS

Name: Mylius M66RS
Brand: Mylius Yachts

In production

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Mylius-M66RS-yacht-a-vela — Mylius Yachts

Summary

Sailing MonohullSail

Length overall: 72.9 ft
Beam: 18.8 ft
Draft: 11.2 ft
Displacement: 53,352 lb
Cabins: 3
Berths: 6

* A standard reference image, not the actual boat — shown to help visualise this model's published dimensions.

Best Suited For

Performance Cruising
From the published figures: performance cruiser · 3 cabins
Liveaboard
From the published figures: LOA 22.22 m · 3 cabins · 3 heads · fresh water 1000 L

Tags are derived from certified class, length, sail area, accommodation and tankage using the criteria described on the Sources page; an editor may add or remove one.

Sailing Ratios

Classic yacht-design ratios worked out from the builder's published figures, each shown against the bands designers read it by.

Sail area / displacement

How much sail the boat carries for its weight — its power in light air.

not published: sail area

How it is worked out

sail area (ft²) ÷ (displacement as ft³ of seawater)^⅔

Displacement / length

How heavy the boat is for its waterline length. Lower is lighter and quicker; higher is steadier and roomier.

95· Ultralight

How it is worked out

displacement (long tons) ÷ (0.01 × waterline length in ft)³

Ballast ratio

The share of the weight carried in the keel — a rough guide to stiffness, though how deep that weight sits matters as much.

35· Moderate

How it is worked out

ballast ÷ displacement × 100

Comfort ratio

Ted Brewer's measure of how gently a boat moves in a seaway. Higher means a slower, easier motion.

24.9· Coastal

How it is worked out

displacement (lb) ÷ (0.65 × (0.7 × LWL + 0.3 × LOA) × beam^1.333), lengths in ft

Capsize screening

A guide from the inquiry after the 1979 Fastnet race: below 2 was taken as suited to ocean passages. It ignores hull shape and where the ballast sits.

2.00· 2 and above

How it is worked out

beam (ft) ÷ (displacement as ft³ of seawater)^⅓

Hull speed

Roughly the speed a displacement hull reaches before it has to climb its own bow wave.

10.6 kn

How it is worked out

1.34 × √(waterline length in ft), in knots

Most builders publish a light displacement. The ratios were defined on a loaded boat, so every boat here reads a little lighter than a surveyor's figure would — all alike, which keeps them comparable.

Tanks

What the builder publishes about how fast, how strong and how much the boat carries.

Fuel and water on one scale: a tank twice the height holds twice as much.

Fuel264 gal
Water264 gal
44 gal of water per berth

Dimensions

LOA: 72.9 ft (22.22 m)
Hull length: 66.9 ft (20.4 m)
LWL: 63 ft (19.2 m)
Beam: 18.8 ft (5.73 m)
Draft (min): 11.2 ft (3.4 m)
Draft (max): —
Air draft: —
Displacement: 53,352 lb (24,200 kg)
Ballast: 18,629 lb (8,450 kg)
Cabins: 3
Heads: 3
Berths: 6

Sail Plan

Main sail: —
Jib: —
Genoa: —
Sail area: —
Downwind sail area: —
Rig type: —

Engine and Tanks

Engine: —
Engine count: —
Engine manufacturer: —
Propulsion type: —
Fuel capacity: 264 gal (1,000 L)
Fresh water capacity: 264 gal (1,000 L)
Black water capacity: —

Construction

Mast material: —
Hull material: Carbon
Deck material: —
Keel type: —
Rudder type: —
Steering wheels: —

Builder's Own Figures

Crew berths: 1
Length: overall 20.4 m; LOA with bowsprit 22.22 m
Displacement basis: approx.

Figures read frommylius.it/en/mylius-sailing-yacht-m66rs/read 9/13/2026

Layouts & Drawings

2 drawings from the builder's page: general arrangement, sail plan, profile.

Mylius-M66RS-deck-layout — Mylius Yachts
Mylius-M66RS-interior-layout — Mylius Yachts

About Mylius Yachts

Semi-custom

Italian builder of carbon fast cruiser-racers (M60GL, M66RS, M72, M80RS) and a line of performance motor yachts (M47P, M62P, M76P), built to order at Podenzano near Piacenza.

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