The Devon Coaster is aggressively canvassed for its weight, with a quick, snappy motion best suited to day sailing.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 18.0′, the Devon Coaster tops out around 5.7 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √18.0′ LWL = 5.7 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
SA / Displacement
23.0
Performance-oriented — carries a lot of canvas for its weight.
Displacement / Length
92
Ultralight — responsive and fast, but carries less stores.
Comfort Ratio
7.3
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.63
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
3lbs
Weight needed to sink the hull one inch — loading sensitivity.
Motion & Offshore Suitability
Two ratios that matter most when you're planning passages — how the boat feels in a seaway, and whether the hull geometry is suitable for open ocean.
Comfort Ratio
7.3
Quick, snappy motion — better for day sails and racing than long passages.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
2.63
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Devon Coaster sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser 150–210
Heavy Cruiser 210–300
Estimated Speed by Wind
Rough boat speed estimates at different true wind speeds and points of sail — derived from hull speed, SA/D, and displacement, not measured polars.
| Point of Sail |
6 kts TWS |
10 kts TWS |
15 kts TWS |
20 kts TWS |
| Close-hauled40–50° |
2.7 |
3.4 |
3.7 |
3.9 |
| Close Reach60° |
3.2 |
4.1 |
4.5 |
4.7 |
| Beam Reach90° |
3.9 |
5.0 |
5.6 |
6.0 |
| Broad Reach120–135° |
3.6 |
4.6 |
5.1 |
5.6 |
| Run150–180° |
2.9 |
3.7 |
4.1 |
4.3 |
These are simplified estimates based on hull speed (5.7 kts),
SA/D (23.0), and empirical efficiency curves — not instrument-measured
polars. Real-world speed varies with sea state, bottom condition, sail trim, and current.
Speeds in gold approach hull speed;
bold gold means near or at hull speed.
Wind Range & Comfort Envelope
Estimated wind ranges for comfortable sailing on the Devon Coaster — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–5 kts
5–16 kts
16–24 kts
24+ kts
Ghosting
0–5 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
5–16 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
16–24 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
24+ kts
Storm conditions. Storm jib or bare poles. Seek shelter if coastal.
How It Compares
Side-by-side with the boats most often cross-shopped against the Devon Coaster.
|
Devon Coaster |
Drascombe Longboat |
Kingfisher 20 1 |
Noelex 22 |
Pandora Mk I |
Seal 22 |
| Dimensions |
| LOA |
21.8 |
21.8 |
21.6 |
21.6 |
21.8 |
21.8 |
| LWL |
18.0 |
17.5 |
19.3 |
17.4 |
18.8 |
18.0 |
| Beam |
7.0 |
6.6 |
6.9 |
7.2 |
6.9 |
7.8 |
| Displacement |
1 |
1 |
2 |
1 |
2 |
2 |
| Ballast |
— |
— |
1 |
428 |
980 |
800 |
| Sail Area |
163 |
169 |
177 |
189 |
— |
185 |
| Performance |
| PHRF |
— |
— |
— |
— |
— |
234 |
| SA/Disp |
23.0 |
25.4 |
14.0 |
22.1 |
— |
16.6 |
| Bal/Disp |
— |
— |
— |
26.7 |
— |
— |
| Comfort |
7.3 |
7.4 |
17.1 |
9.6 |
14.5 |
12.7 |
| Capsize |
2.63 |
2.55 |
1.94 |
2.45 |
2.06 |
2.32 |
| Hull Speed |
5.7 |
5.6 |
5.9 |
5.6 |
5.8 |
5.7 |