Seidelmann 299 — Information, Review, Specs

Bob Seidelmann·1979 – 1981·Seidelmann Yachts
Seidelmann 299 drawingBuilder drawing
Hull type
Monohull · fin
Rig
Masthead Sloop
LOA
29.92' · 9.12 m
Displ.
8,000 lbs · 3,629 kg
First year
1979

Introduced in 1979, the Seidelmann 299 represents a distinct era in American boat building where designer Bob Seidelmann applied his championshipwinning racing pedigree to the production cruiser market. Launched as a followup to the company’s early successes, the 299 was marketed as a highvolume performance cruiser that could satisfy both a club racer’s desire for speed and a family’s need for weekend accommodations. During its production run through 1981, the model became known for its unusual proportions—most notably an 11foot beam on a hull just under 30 feet—a design choice that maximized internal living space while providing a stable, albeit sometimes tender, platform for coastal sailing.

Measurements

Dimensions 01

LOA
29.92 ft
LWL
24 ft
Beam
11 ft
Draft
5.42 ft
Max headroom
-
Air draft
-

Construction & hull 02

Construction
Fiberglass
Hull type
Monohull
Keel type
Fin
Rudder
1× Spade
Ballast
3600 lbs
Displacement
8000 lbs
Water
30 gal
Fuel
12 gal

Rig & sails 03

Rig type
Masthead Sloop
P · main luff
33 ft
E · main foot
12 ft
I · fore ht.
38.5 ft
J · fore base
12 ft
Forestay (est)
40.33 ft
Sail area
429 sqft

Calculations 04

SA/D ratio
17.16
Ballast/Disp.
45
D/L ratio
258.35
Comfort ratio
19.67
Capsize screening
2.2
Hull speed
6.56 kn

Sailing Performance & Handling

The Seidelmann 299 is defined by a high ballast-to-displacement ratio of roughly 45%, a figure more commonly associated with heavy-weather offshore cruisers than production racer-cruisers. This weight is concentrated in a 3,600-pound lead fin keel (or a 2,600-pound shoal draft version), which works to counteract a relatively generous sail plan. With a Sail Area/Displacement ratio of approximately 17.2, the 299 is widely regarded as a light-air specialist. In light to moderate breezes, the boat accelerates quickly and maintains momentum through tacks, often outperforming heavier contemporaries like the Catalina 30.

Underway, the 299 exhibits characteristics typical of late-70s beamy designs influenced by the International Offshore Rule (IOR). Owners often report that the boat "finds its groove" at a heel of roughly 20 to 22 degrees; beyond this point, the beamy hull can become tender and prone to rounded-up stalls if not reefed early. The rudder is a high-aspect spade type that offers exceptional maneuverability in tight quarters, though technical discussions from the PHRF New England listings suggest a base handicap of around 183 to 189, placing it firmly in the competitive mid-range for club racing. A notable handling quirk is "mast pumping" in heavy chop, a phenomenon where the rig flexes under load, which some owners have mitigated by installing baby stays or tightening the backstay.

Interior Comfort & Variations

The standout feature of the Seidelmann 299 is its interior volume, facilitated by the massive 11-foot beam that carries well into the ends of the boat. This provides a cabin experience that feels significantly larger than the Wikipedia technical summary suggests for a vessel of this length. The layout features a traditional V-berth forward, followed by a head to port and a hanging locker to starboard. The main salon utilizes the full beam to offer two straight settee berths and a fold-down table, with standing headroom of approximately 6'2".

Materials are typical of the era, utilizing a mix of teak veneers and fiberglass liners. The 299 was essentially the progenitor of the later Seidelmann 295 (introduced in 1982), which modified the hull to be narrower (10'2") and incorporated a centerboard option. Another sibling, the Seidelmann 30-T, shared the 30-foot footprint but offered a different interior arrangement, focusing more on cruising amenities and less on the performance-oriented cockpit layout seen on the 299. The "T" designation often referred to a "Tall Rig" or modified interior depending on the production year, making the 299 the more consistent choice for those seeking the original Bob Seidelmann hull form.

Known Issues & Buyer’s Checklist

Prospective buyers should focus their inspections on the structural integration of the rig and hull, as these boats were built with a focus on lightness that can occasionally lead to stress-related fatigue.

  • Mast Step and Deck Compression: The 299 features a deck-stepped mast supported by an internal compression post. Over time, moisture can penetrate the wooden core of the mast step or rot the support block beneath the cabin sole, leading to visible sagging in the deck or difficulty tuning the standing rigging.
  • Deck Core Saturation: Like many fiberglass boats from the late 70s, the 299 uses a balsa-cored deck. High-stress areas around the primary winches and the chainplates are prone to moisture ingress if not re-bedded regularly. Use a plastic hammer to check for "thudding" sounds indicating delamination.
  • Chainplate Inspection: The chainplates are anchored to the bulkheads. Any signs of water staining on the interior wood should be investigated immediately, as it may indicate weakened structural attachments for the rigging.
  • Rudder Post Play: The spade rudder is effective but subjects the rudder tube and bearings to significant stress. Check for excessive play or "clunking" while the boat is out of the water.
  • Original Engine Maintenance: Many 299s were originally equipped with the Yanmar 2QM15 diesel engine. While these are robust, raw-water-cooled engines, they are prone to internal scaling. Ensure the cooling system has been flushed and that the exhaust elbow is not restricted.

Community & Resources

Owners of these vessels are primarily organized through the Seidelmann Owners Association, a long-standing group that maintains technical archives and provides support for specific restoration projects. While the builder is no longer in operation, the community remains active in the Chesapeake Bay and Great Lakes regions, where these boats were originally most popular.

The Verdict

The Seidelmann 299 remains a compelling choice for the budget-conscious sailor who refuses to choose between a spacious interior and respectable sailing performance. It is a "big" 30-footer that handles like a smaller, nimbler racer in light air.

Pros:

  • Exceptional Interior Volume: The 11-foot beam provides the living space of many 32-to-34-foot yachts.
  • Light Air Performance: A generous sail plan and high ballast ratio make it a joy to sail in light breezes.
  • Value: Often priced lower than comparable Hunter or Catalina models of the same era.

Cons:

  • Tenderness: The hull shape requires early reefing to stay efficient in winds over 15 knots.
  • Structural Aging: Common issues with deck compression and core saturation require a vigilant surveyor.
  • Finicky Rig: The masthead rig can be prone to pumping in heavy seas if not perfectly tuned.

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