The Iw 26 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 19.3′, the Iw 26 tops out around 5.9 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √19.3′ LWL = 5.9 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
14.7
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
43.0%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
259
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
18.2
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.07
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
575lbs
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
18.2
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
2.07
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 Iw 26 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° |
2.2 |
2.8 |
3.1 |
3.2 |
| Close Reach60° |
2.6 |
3.3 |
3.7 |
3.9 |
| Beam Reach90° |
3.2 |
4.1 |
4.6 |
4.8 |
| Broad Reach120–135° |
3.0 |
3.8 |
4.2 |
4.4 |
| Run150–180° |
2.4 |
3.0 |
3.4 |
3.5 |
These are simplified estimates based on hull speed (5.9 kts),
SA/D (14.7), 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 Iw 26 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–22 kts
22–32 kts
32+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–22 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
22–32 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
32+ 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 Iw 26.
|
Iw 26 |
Comet 770 |
Jouet 26 |
Maxi 77 |
Sangria 25 Gte Jeanneau |
Scampi 26 |
| Dimensions |
| LOA |
25.3 |
25.3 |
25.3 |
25.3 |
25.3 |
25.3 |
| LWL |
19.3 |
18.5 |
20.2 |
22.2 |
21.7 |
19.3 |
| Beam |
8.3 |
8.7 |
8.9 |
8.2 |
8.9 |
8.3 |
| Displacement |
4 |
3 |
4 |
4 |
5 |
4 |
| Ballast |
1 |
1 |
1 |
1 |
1 |
1 |
| Sail Area |
238 |
335 |
350 |
269 |
280 |
— |
| Performance |
| PHRF |
— |
— |
— |
240 |
— |
— |
| SA/Disp |
14.7 |
23.1 |
21.6 |
16.1 |
15.2 |
— |
| Bal/Disp |
43.0 |
43.7 |
— |
— |
34.8 |
43.0 |
| Comfort |
18.2 |
15.1 |
16.3 |
17.9 |
18.7 |
— |
| Capsize |
2.07 |
2.28 |
2.20 |
2.00 |
2.07 |
— |
| Hull Speed |
5.9 |
5.8 |
6.0 |
6.3 |
6.2 |
— |