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Tes 28 Magnam

Designer: Tomasz Siwik  ·  Builder: Tes Sailboats  ·  First built: 2010
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About the Tes 28 Magnam

A relatively obscure entry in the world of production sailboats, the Tes 28 Magnam is a compact cruising vessel that has attracted a modest but loyal following among sailors who appreciate an approachable, manageable platform for coastal and nearshore sailing. Built to serve the needs of recreational sailors seeking a capable yet practical boat, the Magnam offers a comfortable entry point into keelboat ownership without overwhelming those newer to the sport. With limited documentation widely available, the Tes 28 Magnam remains something of a hidden gem in the used boat market, which can make researching it a challenge but also means buyers may find opportunities at competitive price points. Its 28-foot length places it in a versatile category, well suited to day sailing, weekend cruising, and exploring sheltered coastal waters with a small crew or family aboard. Prospective buyers are encouraged to seek out existing owners and class communities, as firsthand accounts often reveal the most reliable insights into real-world performance, common maintenance considerations, and the overall character of sailing this understated little cruiser.

Core Dimensions
LOA (Length Overall) 28.00 ft / 8.53 m
LWL (Waterline Length) 26.00 ft / 7.92 m
Beam 9.92 ft / 3.02 m
Max Draft 4.58 ft / 1.40 m
Min Draft 1.06 ft / 0.32 m
Displacement 6,400.00 lb / 2,903 kg
Ballast 1,980.00 lb / 898 kg
Sail Area (Reported) 380.00 ft² / 35.30 m²
Design & Construction
Hull Type Swing Keel
Rigging Type Fractional Sloop
Construction FG
Designer Tomasz Siwik
Builder Tes Sailboats
First Built 2010
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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
17.69
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
17.5
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
2.14
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 6.83
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 921.58
How It Compares

vs. Ericson 28 2, Freedom 27, Hunter 28.5, Precision 28, Southerly 28

This boat Similar boats
Dimensions
LOA
Tes 28 Magnam ★
28.0 ft
Ericson 28 2
28.0 ft
Freedom 27
28.0 ft
Hunter 28.5
28.0 ft
Precision 28
28.0 ft
Southerly 28
28.0 ft
LWL
Tes 28 Magnam ★
26.0 ft
Ericson 28 2
23.3 ft
Freedom 27
24.8 ft
Hunter 28.5
Precision 28
23.0 ft
Southerly 28
24.0 ft
Beam
Tes 28 Magnam ★
9.9 ft
Ericson 28 2
10.0 ft
Freedom 27
8.7 ft
Hunter 28.5
Precision 28
10.0 ft
Southerly 28
9.0 ft
Displacement
Tes 28 Magnam ★
6 lbs
Ericson 28 2
7 lbs
Freedom 27
5 lbs
Hunter 28.5
Precision 28
5 lbs
Southerly 28
8 lbs
Ballast
Tes 28 Magnam ★
1 lbs
Ericson 28 2
3 lbs
Freedom 27
1 lbs
Hunter 28.5
Precision 28
1 lbs
Southerly 28
Sail Area
Tes 28 Magnam ★
380 sq ft
Ericson 28 2
411 sq ft
Freedom 27
Hunter 28.5
Precision 28
Southerly 28
Performance
PHRF Rating (lower = faster)
Tes 28 Magnam ★
Ericson 28 2
Freedom 27
Hunter 28.5
180 s/nm
Precision 28
207 s/nm
Southerly 28
SA / Displacement (higher = more powerful)
Tes 28 Magnam ★
17.7
Ericson 28 2
17.2
Freedom 27
Hunter 28.5
Precision 28
Southerly 28
Ballast / Disp (higher = stiffer)
Tes 28 Magnam ★
Ericson 28 2
Freedom 27
21.8 %
Hunter 28.5
Precision 28
34.6 %
Southerly 28
Comfort Ratio (higher = more comfortable offshore)
Tes 28 Magnam ★
17.5
Ericson 28 2
21.8
Freedom 27
18.6
Hunter 28.5
Precision 28
Southerly 28
27.9
Capsize Screening (lower = safer)
Tes 28 Magnam ★
2.14
Ericson 28 2
2.05
Freedom 27
1.97
Hunter 28.5
Precision 28
Southerly 28
1.77
Displacement / Length (lower = lighter)
Tes 28 Magnam ★
Ericson 28 2
Freedom 27
161
Hunter 28.5
Precision 28
201
Southerly 28
274
Hull Speed
Tes 28 Magnam ★
6.8 kts
Ericson 28 2
6.5 kts
Freedom 27
6.7 kts
Hunter 28.5
Precision 28
Southerly 28
6.6 kts
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