The Thomas 35 is aggressively canvassed for its weight, with a quick, snappy motion best suited to day sailing, and competitive on the racecourse.
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 30.5′, the Thomas 35 tops out around 7.4 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √30.5′ LWL = 7.4 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
PHRF Rating
72s/nm
Performance racer — quick around the cans and offshore.
SA / Displacement
24.6
Performance-oriented — carries a lot of canvas for its weight.
Ballast / Displacement
45.4%
Race-oriented ballast ratio — very stiff and powerful.
Displacement / Length
154
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
18.3
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.15
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
1lbs
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
18.3
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
2.15
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 Thomas 35 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Thomas 35
72s/nm
Performance racer — quick around the cans and offshore.
J/35
72s/nm
Catalina 350
147s/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° |
3.5 |
4.4 |
4.9 |
5.1 |
| Close Reach60° |
4.2 |
5.3 |
6.0 |
6.2 |
| Beam Reach90° |
5.2 |
6.5 |
7.3 |
7.9 |
| Broad Reach120–135° |
4.8 |
6.0 |
6.7 |
7.3 |
| Run150–180° |
3.8 |
4.8 |
5.4 |
5.6 |
These are simplified estimates based on hull speed (7.4 kts),
SA/D (24.6), 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 Thomas 35 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–5 kts
5–18 kts
18–28 kts
28+ kts
Ghosting
0–5 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
5–18 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
18–28 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 Thomas 35.
|
Thomas 35 |
Catalina 350 |
Ericson 35 3 |
First 35S5 Beneteau |
J/35 |
Jod 35 Jeanneau |
| Dimensions |
| LOA |
35.4 |
35.5 |
35.5 |
35.4 |
35.5 |
35.4 |
| LWL |
30.5 |
30.5 |
28.9 |
29.4 |
30.0 |
30.5 |
| Beam |
11.5 |
12.5 |
11.3 |
11.8 |
12.0 |
11.8 |
| Displacement |
9 |
13 |
13 |
11 |
10 |
11 |
| Ballast |
4 |
5 |
5 |
4 |
4 |
4 |
| Sail Area |
702 |
566 |
597 |
556 |
590 |
602 |
| Performance |
| PHRF |
72 |
147 |
— |
— |
72 |
— |
| SA/Disp |
24.6 |
16.2 |
17.3 |
17.6 |
19.9 |
18.7 |
| Bal/Disp |
45.4 |
40.9 |
40.0 |
36.6 |
40.0 |
35.9 |
| Comfort |
18.3 |
21.9 |
25.7 |
21.2 |
27.5 |
20.9 |
| Capsize |
2.15 |
2.12 |
1.93 |
2.10 |
1.68 |
2.09 |
| Hull Speed |
7.4 |
7.4 |
7.2 |
7.3 |
8.5 |
7.4 |