Viper
Viper 640
Manufacturer: Viper
Designed by: Brian Bennett
| LOA | 21.08′ |
| LWL | 19.08′ |
| Beam | 8.17′ |
| Draft (Deep) | 4.49′ |
| Draft (Shoal) | 1.83′ |
| Displacement | 750 lbs. |
| Ballast | 262 lbs. |
| Sail Area | 211.2 sq. ft. |
| Rig: I | 21.98′ |
| Rig: J | 7.48′ |
| Rig: E | 10.07′ |
| Rig: P | 25.62′ |
| Sail Area (Main) | 129 sq. ft. |
| Sail Area (100% Jib) | 82.21 sq. ft. |