Com-Pac Sunday Cat
Com-Pac Yachts · designed by Clark Mills · 2008
centerboardCatboatUnited States
The Com-Pac Sunday Cat is a 17-foot catboat sailboat designed by Clark Mills and built by Com-Pac Yachts, first launched in 2008.
General
| Builder | Com-Pac Yachts |
|---|---|
| Designer | Clark Mills |
| Years built | 2008 |
| Hull type | centerboard |
| Rig type | Catboat |
| Construction | fiberglass |
| Origin | United States |
Dimensions
| LOA | 17.33 ft5.28 m |
|---|---|
| LWL | 15.00 ft4.57 m |
| Beam | 7.40 ft2.26 m |
| Draft (max) | 4.50 ft1.37 m |
| Displacement | 1,500 lb680 kg |
| Ballast | 300 lb136 kg |
| Sail Area | 150 ft²13.9 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 18.32 Cruiser — good all-round performance
Ballast / Displacement 20.0 % Higher = stiffer / more sail-carrying power
Displacement / Length 198 Light
Comfort Ratio 10.3 Racing / light coastal
Capsize Screening 2.59 Better suited to coastal use (> 2.0)
Hull Speed 5.2 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
$12,000 typical range $9,500 – $14,500
⚠ 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.
