MG RS34 Information, Review, Specs

MG RS34 Drawing
Make
MG
Model
RS34
Builder
Marine Glass
Designer
Rob Humphreys
Number Built
15
Production Year(s)
1983 - ??

The MG RS34 represents a high-water mark for Northshore Yachts’ foray into the competitive cruiser-racer market of the late 1980s. Designed by the esteemed Rob Humphreys, the RS34 was the "Regatta Sport" iteration of the popular MG 335 hull. While Northshore is widely recognized today for the swing-keel Southerly range, the MG line showcased the builder's ability to produce stiff, performance-oriented hulls capable of competing under the CHS and IMS handicap systems of the era. The RS34 was specifically engineered for the sailor who prioritized silver-ware on Sundays but required a legitimate, well-built platform for cross-channel cruising during the week. It remains a sought-after model for those who appreciate the design pedigree of Humphreys and the robust construction standards of the Northshore yard.

Sailing Performance & Handling

The MG RS34 is defined by its 7/8 fractional rig and a significantly higher ballast ratio than its cruising counterpart, the MG 335. While sharing the same hull lines, the RS34 typically features a deeper, lead-ballasted fin keel and a taller mast that supports a larger sail area. On the water, this translates to a boat that is "tweaky" in the best sense of the word, responding instantly to adjustments in backstay tension and traveler position. According to design notes from Humphreys Yacht Design, the hull was optimized for balanced handling across a wide range of heel angles, ensuring the rudder retains grip even when pressed hard upwind.

In light air, the RS34 is notably more nimble than contemporary 34-footers from mass-market French builders. Its displacement-to-length ratio is moderate, providing enough momentum to punch through a coastal chop without the jarring motion typical of ultra-light displacement boats (ULDBs). Owners often report that the boat finds its "groove" quickly; once the sails are trimmed, it tracks with precision, requiring minimal helm input. The use of a large main and smaller, non-overlapping or slightly overlapping jibs makes it easier to handle for short-handed crews compared to the massive genoas found on masthead rigs of the same era.

Interior Comfort & Variations

Despite its racing aspirations, the RS34 does not sacrifice the basic tenets of cruising comfort. The layout is a classic Mediterranean arrangement, featuring two private cabins and a central saloon. The interior is largely identical to the MG 335, though some RS34 units were finished with lighter materials or open storage bins to save weight for racing. The woodwork reflects the high standards of Northshore Yachts, utilizing teak veneers and solid trim that have generally aged better than the interior finishes of high-volume production boats.

The "Aft-Cabin" variant is the most common, providing a generous double berth tucked under the cockpit sole, which is a significant feat for a 34-foot performance hull. The forward V-berth is adequate for two adults, though it is often relegated to sail storage during racing events. Headroom is generous at approximately 6’1” (1.85m) in the main saloon, and the L-shaped galley is functional for offshore passage-making, equipped with a deep sink and a gimballed stove. The primary variation within the model line is the sibling MG 335, which utilizes a shallower keel and a shorter masthead rig for those prioritizing ease of handling and "ditch-crawling" over pure speed.

Known Issues & Buyer’s Checklist

Prospective buyers of an MG RS34 should focus their inspections on the stresses inherent in a decades-old racing platform.

  • Keel-to-Hull Joint: Because the RS34 was often campaigned hard, the internal stiffening grid (matrix) should be inspected for any signs of movement or crazing around the keel bolts. High-load groundings in a racing context can lead to structural compromise that may not be immediately visible from the exterior.
  • Chainplate Reinforcement: The fractional rig places significant tension on the shroud attachments. Check the bulkheads where the chainplates are through-bolted for signs of water ingress or "working" (movement).
  • Rudder Bearings: The RS34 uses a high-aspect spade rudder. Over time, the bearings can develop play, leading to a "clunking" sensation at the helm. While replaceable, it is a common maintenance item for this age of vessel.
  • Osmosis: While Northshore hulls are generally well-regarded, like most GRP boats built in the late 80s, they are not immune to osmotic blistering. A moisture meter check of the hull during a survey is essential.
  • Rigging Age: Given the performance nature of the boat, the standing rigging is often subjected to higher loads than a pure cruiser. If the rigging is older than 10 years, it should be factored into the replacement cost.

Community & Resources

The MG RS34 benefits from the broader Northshore community. The most prominent technical resource is the Southerly Owners Association (SOA), which, while focused on the swing-keel models, often includes MG owners due to the shared builder heritage and technical commonalities. Owners also frequently interact through regional UK sailing forums where the MG 335/RS34's racing handicap (IRC/LEH) is a recurring topic of discussion.

The Verdict

The MG RS34 is a "thinking person's" cruiser-racer that offers more character and structural integrity than many modern equivalents. It remains an excellent entry point for sailors who want to participate in club racing without sacrificing the ability to take the family cruising in comfort.

Pros:

  • Exceptional design pedigree by Rob Humphreys.
  • Stronger build quality than typical mass-production competitors.
  • Highly responsive and rewarding to sail for experienced crews.
  • Genuine two-cabin cruising interior with good headroom.

Cons:

  • Requires active sail trimming to perform at its peak.
  • The deep fin keel (in RS trim) limits access to shallow anchorages.
  • Age-related maintenance of racing hardware can be costly.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Spade
Ballast
2470 lbs
Displacement
7850 lbs
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
34 ft
Waterline Length (LWL)
29.53 ft
Beam
11.2 ft
Draft
6.5 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Fractional Sloop
P (Main Luff)
42.07 ft
E (Main Foot)
15.5 ft
I (Foretriangle Height)
38.71 ft
J (Foretriangle Base)
11 ft
Forestay Length (est)
40.24 ft
Sail Area
580 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
23.49
Ballast / Displacement Ratio
31.46
Displacement / Length Ratio (D/L) Ratio
136.09
Comfort Ratio
15.74
Capsize Screening Formula
2.25
Hull Speed
7.28 kn