Wharram Pahi 42 / Captain Cook
Description
The Wharram Pahi 42 (also known as the Pahi 42 Captain Cook) is a British plywood/epoxy self-build cruising catamaran designed by James Wharram (with input from Hanneke Boon and others) as the first in the Pahi series to feature a central deck pod for improved shelter, steering station protection, and additional sleeping space. Introduced in 1979/1980, it marked a step forward in Wharram designs with more rounded "female" hull shapes, greater freeboard, a spacious bridgedeck pod, and flexible rope-lashed crossbeams for shock absorption in ocean waves. Offered exclusively as detailed plans for amateur and professional home builders (ply/epoxy/glass construction over a backbone frame), it has no factory production; an unknown but respectable number of hulls have been completed worldwide since the early 1980s (part of Wharram's overall 10,000+ plan sets sold across designs), with many used for family long-distance cruising and liveaboard ocean voyaging. Key features include extreme shallow draft for beaching/gunkholing, stable platform with open or podded bridge deck, accommodations for 6–8 (bunks in hulls plus pod cabin).
Construction Details
| Designer | James Wharram Designs |
|---|---|
| Builder | Home Built |
| Length | 42.000 ft |
| LOA | 42.000 ft |
| LWL | 34.000 ft |
| Beam | 22.000 ft |
| Displacement | 7840 lb |
| Max Draft | 3.500 ft |
| Min Draft | 2.330 ft |
| Year Built | 1979 |
The standard boat dimensions
| i | 37.50 ft |
|---|---|
| j | 8.55 ft |
| p | 40.75 ft |
| e | 14.25 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 37.50 ft | 8.55 ft | 40.75 ft | 14.25 ft | - | - | - | - |
Blueprints
Sails
Wharram Pahi 42 / Captain Cook - MAINSAIL
| Luff | 40.75 ft - (12421 mm) |
|---|---|
| Foot | 14.25 ft - (4343 mm) |
| Leech | * 42.42 ft - (12930 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 42.7 ft - (13015 mm) |
| Head (inches) | * 6 in - (152 mm) |
| Area | * 298.99 ft² |
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Wharram Pahi 42 / Captain Cook - GENOA
| Luff | 44 ft - (13411 mm) |
|---|---|
| Foot | 21 ft - (6401 mm) |
| Leech | 37 ft - (11278 mm) |
| Length Perpendicular | 17.6 ft - (5364 mm) |
| Area | * 387.22 ft² |
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Wharram Pahi 42 / Captain Cook - YANKEE
| Luff | 37.5 ft - (11430 mm) |
|---|---|
| Foot | 19 ft - (5791 mm) |
| Leech | 26.25 ft - (8001 mm) |
| Length Perpendicular | 12.42 ft - (3786 mm) |
| Area | * 232.93 ft² |
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Wharram Pahi 42 / Captain Cook - STAYSAIL
| Luff | 26.5 ft - (8077 mm) |
|---|---|
| Foot | 11.25 ft - (3429 mm) |
| Leech | 21 ft - (6401 mm) |
| Length Perpendicular | 8.55 ft - (2606 mm) |
| Deck Angle | * 5 ° |
| Area | * 113.22 ft² |
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Wharram Pahi 42 / Captain Cook - MIZZEN
| Luff | 11 ft - (3353 mm) |
|---|---|
| Foot | 6 ft - (1829 mm) |
| Leech-AftHdBd | 11.04 ft - (3365 mm) |
| Tack Ang | * 74.47 ° |
| Diag (clew/head) | 11.03 ft - (3362 mm) |
| Head (inches) | * 3.5 in - (89 mm) |
| Area (no Roach) | * 33.41 ft² |
| Edit in Calculator |
Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.
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