BoatsMG RS34

MG RS34

Fractional Sloop · Fin keel, spade rudder · First built 1983

A high-performance IOR 3/4 ton design by Rob Humphreys, built for speed in both Grand Prix and Racer/Cruiser configurations

Designed by Rob Humphreys, built by Marine Glass.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/spade Rudder

Is it for you?

Character

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

LivelySea-kindly

Her light displacement on a moderate beam gives 16 — a quick, lively motion that feels every wave.

Comfort ratio 16
CoastalBluewater

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

Capsize screening 2.26
LightHeavy

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

Displacement / length 136
EasygoingPowered-up

21.9 — plenty of sail for her weight; lively and quick to respond.

Sail area / displacement 21.9
TenderStiff

31% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 31%

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

  • Draws more than ~80% of boats her size on file

Compared with 2954 boats of the same type within a quarter of her length.

The record

Full specifications

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

Dimensions
Weights
Ballast / displacement
31.5%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
21.9
Displacement / length
136.1
Comfort ratio
15.7
Capsize screening
2.26
Hull speed
7.3 kn
Pounds / inch immersion
1182
Hull
Hull type
Fin w/spade rudder
Construction
Fiberglass
Production
Years built
First built 1983
Units built
15
Designer
Rob Humphreys
Builder
Marine Glass, Northshore Yachts

Boats like this, on the water

Nobody has filmed this one — but these are close.

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/10510.52 mSame hull family0.2 m longerA 10.52-metre fractional sloop featuring a high 23.65 sail area-to-displacement ratio for agile, responsive handling
Jeanneau 34.210.29 mSame hull familyNear-identical lengthA Jacques Fauroux-designed masthead sloop widely favored for Mediterranean and Aegean charter fleets
Mirage 3310.21 mSame hull familyNear-identical lengthA Robert Perry-designed masthead sloop offering a balanced, performance-oriented cruiser profile in a 33-foot hull
Cal Boats 3410.13 mSame hull family0.2 m shorterA masthead sloop with a fin keel and spade rudder, favored by Jensen Marine founder Jack Jensen for personal cruising
Tartan Marine 34-210.49 mSame hull familyNear-identical lengthA Sparkman & Stephens masthead sloop featuring an extended stern and refined interior based on the Tartan 33R
X-Yachts X-3410.36 mSame hull familyNear-identical lengthA Niels Jeppesen-designed fractional sloop balancing performance and comfort with a stiff, bulb-keeled hull

The family

Related models

The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.

Keep looking

Nothing filmed of this one yet

Two ways to keep looking — both search what the fleet has actually recorded.

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