| Development | |
|---|---|
| Designer | Lock Crowther |
| Location | Australia |
| Year | 1959 |
| Role | day racer |
| Boat | |
| Crew | 1-2 |
| Hull | |
| Type | Open trimaran |
| Construction | 3/16" sheet plywood on wooden frames and stringers, wooden mast |
| LOA | 20 ft (6.1 m) |
| Beam | 11 ft (3.4 m) |
| Hull appendages | |
| Keel/board type | centreboard |
| Rig | |
| Rig type | Fractional Bermuda or Marconi sloop rig |
| Sails | |
| Upwind sail area |
227 sq ft (21.1 m2) (sloop rig - racing) |
| Total sail area | 227 sq ft (21.1 m2) |
227 sq ft (21.1 m2) (sloop rig - racing)
Bunyip 20 was a day racing trimaran sailboat designed and built by Lock Crowther and his family in 1959, while he was still a teenager. It was named after the Australian mythical creature.
In 1960 Crowther raced the first boat at the Easter regatta at Paynesville, Victoria, Australia, and won against a field of 300 boats. This initial success inspired others to build similar boats, and began his career.