JUMPAHEAD
Fractional Sloop • Catamaran Twin Cbrd. • Built 1948
Dimensions
- LOA
- 16 ft
- LWL
- — ft
- Beam
- 7.5 ft
- Max Draft
- — ft
- Min Draft
- 0.66 ft
- Displacement
- 376 lbs
- Ballast
- — lbs
Performance Ratios
- Capsize Ratio ⓘ
- 4.16 (use caution offshore)
- SA/D Ratio ⓘ
- 51.3
- D/L Ratio ⓘ
- —
- Ballast Ratio ⓘ
- —
Sail Plan
- Sail Area
- 167 sq ft
Construction
- Hull Type
- Catamaran Twin Cbrd.
- Rig Type
- Fractional Sloop
- Hull Material
- Wood
- Ballast Type
- —
Production
- First Built
- 1948
- Last Built
- —
- Number Built
- —
Notes: The JUMPAHEAD was introduced at about the same time as the Prout SHEARWATER, and was one of the earliest 'production' catamarans from the UK. It is thought that several hundred were built. In the early 1960's, a very few of a fiberglass version were built by Grampian Marine of CAN.\nThe designer, Bill O'Brian, was one of the pioneers of racing and cruising cat design.
Designer
- Bill O'Brian (1920–2009)
Builder
- Grampian Marine (1962–1977)