Tempest
Lanaverre · designed by Ian Proctor · 1965
keelboatBermuda rigUnited Kingdom
The Tempest is a 22-foot bermuda rig sailboat designed by Ian Proctor and built by Lanaverre, first launched in 1965.
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General
| Builder | Lanaverre |
|---|---|
| Designer | Ian Proctor |
| Years built | 1965 |
| Hull type | keelboat |
| Rig type | Bermuda rig |
| Construction | fiberglass |
| Origin | United Kingdom |
Dimensions
| LOA | 21.98 ft6.70 m |
|---|---|
| LWL | 20.00 ft6.10 m |
| Beam | 6.46 ft1.97 m |
| Draft (max) | 3.58 ft1.09 m |
| Displacement | 1,021 lb463 kg |
| Ballast | 440 lb200 kg |
| Sail Area | 247 ft²22.9 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 38.98 Performance / racer — powered up
Ballast / Displacement 43.1 % Higher = stiffer / more sail-carrying power
Displacement / Length 57 Ultralight
Comfort Ratio 6.4 Racing / light coastal
Capsize Screening 2.57 Better suited to coastal use (> 2.0)
Hull Speed 6.0 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
$12,500 typical range $10,000 – $15,000
⚠ 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.
