Surprise
Archambault Boats · designed by Michel Joubert of Joubert Nivelt Design · 1977
fin keelBermuda rigFrance
The Surprise is a 25-foot bermuda rig sailboat designed by Michel Joubert of Joubert Nivelt Design and built by Archambault Boats, first launched in 1977.
General
| Builder | Archambault Boats |
|---|---|
| Designer | Michel Joubert of Joubert Nivelt Design |
| Years built | 1977 |
| Hull type | fin keel |
| Rig type | Bermuda rig |
| Construction | — |
| Origin | France |
Dimensions
| LOA | 25.10 ft7.65 m |
|---|---|
| LWL | 21.65 ft6.60 m |
| Beam | 8.14 ft2.48 m |
| Draft (max) | 5.25 ft1.60 m |
| Displacement | 2,756 lb1,250 kg |
| Ballast | 1,102 lb500 kg |
| Sail Area | 286 ft²26.6 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 23.28 Performance / racer — powered up
Ballast / Displacement 40.0 % Higher = stiffer / more sail-carrying power
Displacement / Length 121 Light
Comfort Ratio 11.5 Racing / light coastal
Capsize Screening 2.32 Better suited to coastal use (> 2.0)
Hull Speed 6.2 kn Theoretical max displacement speed
How these numbers are calculated
- SA / Displacement
SA ÷ (Disp ÷ 64)^(2/3)— Power-to-weight. < 16 under-canvassed, 16–20 cruiser, > 20 racer.- Ballast / Displacement
Ballast ÷ Disp × 100— Stability/stiffness. Higher carries sail better.- Displacement / Length
Disp(lt) ÷ (0.01 · LWL)³— < 100 ultralight, 100–200 light, 200–300 moderate, > 300 heavy.- Comfort Ratio (Brewer)
Disp ÷ (0.65 · (0.7·LWL + 0.3·LOA) · Beam^1.33)— Motion in a seaway. Higher = more comfortable offshore.- Capsize Screening
Beam ÷ (Disp ÷ 64)^(1/3)— ≤ 2.0 favored for offshore; > 2.0 better for coastal use.- Hull Speed
1.34 · √LWL— Theoretical max displacement speed in knots.
Estimated price
$17,500 typical range $14,000 – $21,000
⚠ Rough estimate only — not market data. Derived from a simple model based on length and hull age; actual asking prices vary widely with condition, equipment, engine hours and location.
