The Windjammer 17 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 14.7′, the Windjammer 17 tops out around 5.1 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √14.7′ LWL = 5.1 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
63.8
Performance-oriented — carries a lot of canvas for its weight.
Comfort Ratio
2.2
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
4.02
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
332lbs
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
2.2
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
4.02
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
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° |
2.4 |
3.1 |
3.4 |
3.6 |
| Close Reach60° |
2.9 |
3.7 |
4.1 |
4.3 |
| Beam Reach90° |
3.6 |
4.5 |
5.1 |
5.1 |
| Broad Reach120–135° |
3.3 |
4.2 |
4.7 |
4.9 |
| Run150–180° |
2.6 |
3.3 |
3.7 |
3.9 |
These are simplified estimates based on hull speed (5.1 kts),
SA/D (63.8), 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 Windjammer 17 — 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 Windjammer 17.
|
Windjammer 17 |
Day Sailer Ii |
Daysailer |
Holder 17 |
Leisure 17 |
Wildfire |
| Dimensions |
| LOA |
16.8 |
16.8 |
16.8 |
17.0 |
17.0 |
16.8 |
| LWL |
14.7 |
15.5 |
15.5 |
15.0 |
14.0 |
15.0 |
| Beam |
6.3 |
6.3 |
6.3 |
7.3 |
7.0 |
6.3 |
| Displacement |
250 |
575 |
575 |
950 |
1 |
620 |
| Ballast |
— |
— |
— |
345 |
550 |
250 |
| Sail Area |
158 |
— |
145 |
147 |
148 |
— |
| Performance |
| SA/Disp |
63.8 |
— |
33.6 |
24.4 |
18.3 |
— |
| Bal/Disp |
— |
— |
— |
— |
— |
40.3 |
| Comfort |
2.2 |
4.9 |
4.9 |
6.7 |
11.5 |
— |
| Capsize |
4.02 |
3.01 |
3.01 |
2.95 |
2.46 |
— |
| Hull Speed |
5.1 |
5.3 |
5.3 |
5.2 |
5.0 |
— |