BoatsSirius 727

Sirius 727

Fractional Sloop · Fin With Rudder On Skeg

A development of the Sirius 24, this fractional sloop features a fin keel with skeg-mounted rudder for balanced handling

Designed by H. Streuer & Heribert Streuer, built by Grell Werft (Germany).

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin With Rudder On Skeg

See her sail

The Sirius 727, on the water

The fleet's own footage — the truest look at how she really moves.

Footage from Hashtag Sal

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

TrailerableBeam 2.50 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 1,420 kg of hull, so roughly 2,000 kg on a trailer: check that against your own towing rating.
LivelySea-kindly

Her light displacement on a moderate beam gives 13 — a quick, lively motion that feels every wave.

Comfort ratio 13
CoastalBluewater

2.24 — right around the 2.0 line, the edge between coastal and offshore.

Capsize screening 2.24
LightHeavy

143 — light for her waterline, so she is easily driven and quick to accelerate.

Displacement / length 143
EasygoingPowered-up

17.7 — moderate power for her weight; steady, all-round performance.

Sail area / displacement 17.7
TenderStiff

43% of her weight is ballast — stiff, standing up well to her sails.

Ballast 43%

Light and lively — happiest day-sailing and coastal-hopping in settled weather.

What the fleet has seen

The Sirius 727, as the fleet has seen it

Derived from the videos the fleet has analysed of this model. ▶ marks open the moment aboard.

The Sirius 727 is a 7.3-meter fractional sloop designed by H. Streuer and built by Grell Werft and Sirius-Werft GmbH in Germany. It features a fin keel with a rudder on skeg, a 2.5-meter beam, 1.2-meter draft, and displaces 1420 kg. Aboard Hashtag Sal, a Sirius 727 provides a stable living platform in Ilha Grande, Brazil, where its independent utilities offer an alternative to unreliable shore-based infrastructure.1:04 This liveaboard choice requires ongoing maintenance, including electrical system overhauls and wood restoration.18:21 The Sirius 727 is a development of the Sirius 24, which offered a keel/centerboard configuration and transom-hung rudder.

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Seen once across one channel of the fleet.

Basemap © Wikimedia Commons · CC BY-SA 4.0

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Ballast / displacement
43.0%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
17.7
Displacement / length
142.8
Comfort ratio
13.3
Capsize screening
2.24
Hull speed
6.2 kn
Pounds / inch immersion
627
Hull
Hull type
Fin with rudder on skeg
Construction
Fiberglass
Production
Designer
H. Streuer, Heribert Streuer
Builder
Grell Werft (GERMANY), Sirius -Werft GmbH

Boats like this, on the water

More boats like her, on the water

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

J Boats Tillotson Pearson J/247.32 mSame hull familyNear-identical lengthA legendary Rodney Johnstone design that defined the modern one-design racer with its high sail-area-to-displacement ratio
Everything You Think About Sailing Is Wrong3:59from The Sailing Doodles Podcast
J Boats Tillotson Pearson J/808.00 mSame hull family0.7 m longerA 1992 fractional sloop with a high 26.59 sail area-to-displacement ratio, engineered for rapid, agile performance
Transiting the Chesapeake Bay - North and South23:13from Maryland School of Sailing
Dehler Yachts 25CR7.50 mSame hull family0.2 m longerA Van de Stadt-designed fractional sloop with a high sail area-to-displacement ratio built for spirited performance
Don't Make The Same MISTAKE We Did [Ep.28]9:27from Sailing Oceanaire | Wik & Rox
Catalina Yachts 22 MKII7.26 mSame hull familyNear-identical lengthAn upgraded 1995 iteration of the classic trailerable cruiser, featuring a fin keel and transom-hung rudder
Why TODAY Is the Best Time to Buy a 22-Foot Sailboat2:24from Lady K Sailing
Halcyon 236.93 mSame hull family0.3 m shorterA triple-keeled masthead sloop by Alan H. Buchanan, offering shallow-draft versatility based on the earlier Crystal 23
Zero Dollar Cruising Dream | Halcyon 23from Practical Sailor
J J/77.04 mSame hull family0.2 m shorterA 2024 fractional sloop with a shallow 1.16m draft and a high 23.55 sail-area-to-displacement ratio for responsive daysailing
J7: Finally an affordable sailboat0:49from SEILmagasinet

The family

Boats like this

Nearby designs by size, type, and era — worth a look alongside her.

Sirius 23A lively masthead sloop designed by K. Schroter Travenunde with a high sail-area-to-displacement ratio for her sizeSirius 26 (Streuer)A versatile masthead sloop offered in fixed or swing keel versions, featuring a rare 1980s variant with a wood coach roofSirius 31 MA Peter Schmidt-designed masthead sloop with a skeg-hung rudder, built for stable, comfortable cruising since 1988Sirius 32 DSA deck saloon masthead sloop with a shoal-draft fin keel, designed for comfortable cruising in a compact 32-foot hull

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The fleet has more to say

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