| His model aircraft were usually scruffy constructions of paper and balsa wood and far from aerodynamically efficient. |
| If you're thinking of building an escape raft, all you'll get is balsa wood. |
| The deck and cabin structure are a sandwich construction utilizing plywood rather than balsa as a core material. |
| We built a fleet of Balsas with reeds and blown-out sheepskins, and followed him. |
| But the Balsas are the most original, and, therefore, the most attractive sight. |
| He ordered two enormous balsas to be fashioned in Lake Titicaca. |
