Nacra Inter 20

The Nacra Inter 20 is built for the Formula 20 class, a class little developed apart from Northern Europe. Nacra Inter 20 is a powerful catamaran, designed for crews weighting more than 180kg - 395lbs. The power of the rig is partially offset by a large width and Harken fittings properly sized, but a solid crew is still needed to manage the 25sqm - 269sqft spinnakers.

Although the boat was designed years ago it has modern technical details such as square top mainsail, a carbon mast and inclined hull, by 4°, in the manner of Class A. She is also equipped with high ratio carbon appendages, making this catamaran excellent in the upwind.

See the Nacra Inter 20's specifications on

Main Features

ModelNacra Inter 20
Sailboat typeBeach catamaran
ClassFormula 20
DesignerGino Morrelli
Pete Melvin
Building years (first/last)1998 / 2001
SuccessorNacra 20
CE regulationC-2 / D-4
ConstructionSandwich foam/fiberglass/vinylester
Appendage typeDaggerboards
Rudder bladeDouble transom hung rudders
RudderSingle tiller
Main dimensions
Hull length20.0 ft
Beam over all8.5 ft
Draft (max./min.)3.3 / 0.5 ft
Mast length31.9 ft
Light displacement419 lbs

Rig and sails

Rig typeFractional Sloop with rotating mast
MastFore beam stepped mast
Rig materialMast in Carbon fiber and boom in Aluminum
Standing rigging material1x19 strand wire
Number of rows of spreader1
Spreader anglePushing (diamond)
Spinnaker typeAssymmetrical spinnaker on bowsprit
Upwind sailarea246 ft²
Downwind sailarea463 ft²
Mainsail area194 ft²
Jib area52 ft²
Spinnaker area269 ft²

PMainsail hoist measurement (from tack to head)

29.2 ft

IFore triangle height (from mast foot to fore stay attachement)

20.9 ft


Upwind sailarea / displacement1294.5 ft²/Ton
Downwind sailarea / displacement2436.1 ft²/Ton
Trapezes2 set(s)

SCHRSSmall Catamaran Handicap Rating System: rating introduced by ISAF in 1992 to allow to different catamarans to race together.

rating (2013)

Auxiliary engine

BrandNo engine

Based on specification2003

Website :

Did you found this specification helpful? Then share it with your friends by clicking the buttons below:

Similar sailboats

SailboatHull lengthFirst built
Nacra 570 (sailboat) Nacra 57018.6 ft1998
ADH Inotec Diam 3 (sailboat) ADH Inotec Diam 318.1 ft2003
Hobie Cat Miracle 20 (sailboat) Hobie Cat Miracle 2019.6 ft1991
Nacra Inter 18 (sailboat) Nacra Inter 1818.1 ft1996

An error in the data, an item to add? Feel free to contact us