The Tylercraft 21 is moderately powered for comfortable coastal cruising, 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 20.0′, the Tylercraft 21 tops out around 6.0 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √20.0′ LWL = 6.0 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
16.7
Moderate sail power — a capable coastal cruiser, not overpowered.
Displacement / Length
167
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
17.1
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
1.94
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
500lbs
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
17.1
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
1.94
Below the 2.0 offshore threshold — acceptable for ocean passages.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Tylercraft 21 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser 150–210
Heavy Cruiser 210–300
Venture 21
252s/nm
Victory 21
276s/nm
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 |
3.0 |
3.3 |
3.5 |
| Close Reach60° |
2.9 |
3.6 |
4.0 |
4.2 |
| Beam Reach90° |
3.5 |
4.4 |
4.9 |
5.4 |
| Broad Reach120–135° |
3.2 |
4.1 |
4.6 |
5.0 |
| Run150–180° |
2.6 |
3.3 |
3.7 |
3.8 |
These are simplified estimates based on hull speed (6.0 kts),
SA/D (16.7), 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 Tylercraft 21 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–20 kts
20–28 kts
28+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–20 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
20–28 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
28+ 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 Tylercraft 21.
|
Tylercraft 21 |
Aurora 21 |
Debutante 21 |
Snapdragon 21 |
Venture 21 |
Victory 21 |
| Dimensions |
| LOA |
21.0 |
21.0 |
21.0 |
21.0 |
21.0 |
21.0 |
| LWL |
20.0 |
15.5 |
16.0 |
18.0 |
18.5 |
15.0 |
| Beam |
7.0 |
6.3 |
7.0 |
7.3 |
6.8 |
6.3 |
| Displacement |
3 |
1 |
2 |
2 |
1 |
1 |
| Ballast |
— |
500 |
— |
950 |
400 |
500 |
| Sail Area |
216 |
185 |
155 |
188 |
— |
185 |
| Performance |
| PHRF |
— |
— |
— |
— |
252 |
276 |
| SA/Disp |
16.7 |
20.8 |
15.7 |
17.8 |
— |
24.3 |
| Bal/Disp |
— |
29.4 |
— |
— |
26.7 |
37.0 |
| Comfort |
17.1 |
13.1 |
13.2 |
12.9 |
— |
10.8 |
| Capsize |
1.94 |
2.12 |
2.22 |
2.23 |
— |
2.26 |
| Hull Speed |
6.0 |
5.3 |
5.4 |
5.7 |
— |
5.2 |