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ALERION EXPRESS 28

Built by Tillotson Pearson Inc, • Designed by Carl Schumacher

General Information

Hull Type: Fin w/spade rudder

Rigging Type: Fractional Sloop

Construction: FG

First Built: 1990

Number Built: 470

Dimensions

Length Overall (LOA): 8.61 m

Length Waterline (LWL): 6.96 m

Beam: 2.49 m

Draft (Max): 1.37 m

Weight & Ballast

Displacement: 1,996 kg

Ballast: 907 kg

Ballast Type: Lead

Sail Plan

Foresail Area: 13.59 m²

Mainsail Area: 19.16 m²

Sail Area: 32.75 m²

Sail Area (reported): 32.70 m²

I (Fore Triangle Height): 9.14 m

J (Fore Triangle Base): 2.97 m

P (Mainsail Hoist): 10.06 m

E (Boom Length): 3.81 m

Est. Forestay Length: 9.61 m

Engine & Systems

Engine Make: Volvo Penta

Engine Type: Diesel, Saildrive

Engine Model: MD2010

Engine Power: 10 HP

Fuel Capacity: 26 L

Water Capacity: 23 L

Performance Ratios

On the numbers, ALERION EXPRESS 28 rates as lively (SA/D 21.1) and light (D/L 165). Its comfort ratio of 16.9 is in the "lightweight racing" band; its ballast/displacement ratio of 45.5% is in the "high" band. Against its peers, SA/D stands out: higher than 85% of the 1014 monohulls between 7.7 m and 9.5 m in our catalogue.

Ratios use published displacement (often light ship) and reported sail area; see Sources & methodology.

Hull Speed: 6.40 knots

SA/Displacement (Calc): 21.06

SA/D 21.1 — lively. Higher than 85% of the 1014 monohulls between 7.7 m and 9.5 m in our catalogue. Sail area relative to displacement: the higher the number, the more sail the boat carries for its weight, which means more power in light air.

SA/Displacement (Reported): 21.03

Ballast/Disp Ratio: 45.45%

Ballast/Disp 45.5% — high. Higher than 79% of the 1510 monohulls between 7.7 m and 9.5 m in our catalogue. The share of the boat's weight that is ballast: a higher share generally means a stiffer boat that stands up better to its sail area.

Displacement/Length: 165.29

D/L 165 — light. Lower than 81% of the 1665 monohulls between 7.7 m and 9.5 m in our catalogue. Displacement relative to waterline length: low numbers mean a light boat that accelerates and planes easily, high numbers a heavy boat that carries its weight through a seaway.

Comfort Ratio: 16.92

Comfort ratio 16.9 — lightweight racing. Lower than 75% of the 1664 monohulls between 7.7 m and 9.5 m in our catalogue. An estimate of motion comfort in waves from displacement, beam and length: higher values suggest a slower, gentler motion.

Capsize Screening: 2.00

Capsize screening 2.00 — above the guideline. Lower than 53% of the 1709 monohulls between 7.7 m and 9.5 m in our catalogue. A screening formula from beam and displacement: lower is better, and values under 2.0 are the common guideline for offshore boats.

S-Number: 3.67

S-number 3.7. Higher than 85% of the 1006 monohulls between 7.7 m and 9.5 m in our catalogue. A stability number combining hull form and ballast: higher values indicate better stability and sea-keeping.

Immersion: 119 kg/cm

Notes

The first boats (7) were built by Holby Marine. After 1991 the boats were built by TPI. Later boats have an updated keel w/bulb designed by Garry Hoyt.