Horstman Tri Star 18
Description
The Tri-Star 18 (also styled as TriStar 18 or Horstman Tri-Star 18) is a classic small trimaran designed by Ed Horstman, a pioneering multihull designer known for his Tri-Star series of trailerable trimarans. Introduced in the early 1970s, it was intended as an affordable, easy-to-build, and forgiving pocket cruiser/daysailer for lakes, coastal waters, or even occasional ocean use. Many were home-built from plans using plywood (often cold-molded or double-diagonal methods) or other amateur-friendly techniques, making it popular with first-time multihull builders.
Construction Details
| Designer | Ed Horstman |
|---|---|
| Builder | Home Built |
| Length | 18.000 ft |
| LOA | 18.000 ft |
| Beam | 12.100 ft |
| Displacement | 600 lb |
| Min Draft | 1.498 ft |
| Year Built | 1971 |
The standard boat dimensions
| i | - |
|---|---|
| j | - |
| p | - |
| e | - |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| - | - | - | - | - | - | - | - |
Blueprints
Sails
Horstman Tri Star 18 - MAINSAIL
| Luff | 22 ft - (6706 mm) |
|---|---|
| Foot | 9.25 ft - (2819 mm) |
| Leech | * 23.44 ft - (7145 mm) |
| Tack Angle | * 88.03 ° |
| Diagonal | * 23.57 ft - (7184 mm) |
| Head (inches) | * 4 in - (102 mm) |
| Area | 101.63 ft² |
| Edit in Calculator |
Horstman Tri Star 18 - JIBSAIL
| Luff | 18.58 ft - (5663 mm) |
|---|---|
| Foot | 8.66 ft - (2640 mm) |
| Leech | 16.58 ft - (5054 mm) |
| Length Perpendicular | 7.73 ft - (2356 mm) |
| Area | 71.78 ft² |
| Edit in Calculator |
Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.
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