Sector: RACING
Design No. 66
MR JUMPA
1 Ton IOR Racing Yacht
Length38′
Design Year1977
Description
Design 66, Mr Jumpa was One Ton Ocean Racing Yacht, is a racing yacht designed by Bruce Farr Yacht Designer, Auckland NZ, in 1977. She has an overall length of 38 feet.
Visual Assets
Technical Specifications
| Year | 1977 |
| Type | Racing Yacht |
| LOA | 38 ft |
| Draft | 1.7 m5.58 ft |
| Ballast | 1,353 kg2,983 lbs |
| Hull Construction | Wood |
| Headsail Hoist (I) | 12.07 m39.6 ft |
| Foretriangle Base (J) | 3.63 m11.91 ft |
| Main Hoist (P) | 3.63 m11.91 ft |
| Main Foot (E) | 13.29 m43.6 ft |
Design Plans
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Designer’s Notes
Mr Jumpa started life as Mr Jump, one of four new Bruce Farr designed centerboard One Tonners built in Auckland for the 1977 One Ton Cup. She was commissioned by top New Zealand yachtsman Graeme Woodroffe, who had campaigned the earlier fixed keel Farr One Tonner 45 South II at the One Ton Cup in Marseilles the year before. As with her sisters, Mr Jumpa was built of cold-moulded wood construction, utilising three skins over closely spaced stringers and ring frames.
Mr Jumpa was last of the new boats to launch, and just one month before the One Ton Cup trials. She was the most distinctive of the new Farr boats, with a varnished hull, and the same open transom and central console style that Woodroffe had employed on 45 South II. Woodroffe combined her more radical arrangement with a curved mainsheet track, specially designed steering pedestals and side deck spinnaker hatches. Mr Jumpa was also the biggest sail carrier of the four, albeit by just 10 square feet over Smir-Noff-Agen for example, and this was offset in part by her shorter rated length (32.2ft), and by the use of a feathering (rather than folding) propeller that gave her a low EPF (engine propeller factor) of 0.9649. Still, the centerboard had to be trimmed in length (depth) to achieve a One Ton rating (27.5ft IOR).