Cosmos 1320

Home-built from plans or kit

Brand:: Schionning

Designed by:: Schionning Designs

Description:

The Cosmos 1320 is a slim hulled and well proportioned performance cruiser which carries a comfortable payload of 2 tons. For many owners this boat will be the optimum size for cruising. She is long enough to carry a cruising payload without becoming heavily loaded - thus preserving good performance in all conditions and seakindliness in rough weather. Her low drag, slender hulls are big enough to provide spacious accommodation inside. However, she is small enough to have a size of rig that can be easily managed. Several commercial yards are building this popular model.

Building the Cosmos range
Plans for the Cosmos range of performance cruising catamarans are available for home builders and professional boat yards. The boats are strip planked in either Durakore (manufactured compound planks with a balsa wood core) or Western Red Cedar. With this method of construction the compound curves of the hulls and decks can be relatively easily accurately formed and building requires only a moderate level of skill and no complex or expensive tools. The result is a sleek looking, strong and light boat. Western Red Cedar is cheaper and a little easier to use but Durakore planking is about 30% lighter because of the significant weight saving in the core. The construction with Durakore gives a very high strength to weight ratio and will produces a lighter boat allowing either a little more performance perhaps for club racing, or a better payload for cruising.

Hulls are built separately upside down on temporary building frames. After being planked, the hulls are sealed with epoxy resin and glass, then turned by hand for sealing inside.

Type:: Performance cruiser

Multihull type:: Catamaran

Construction:

Strip planked in Western Red Cedar (cheaper and easier), or Durakore (lighter)
Balsa cored bulkheads
Furniture from balsa and honeycomb cored panels
Sealed with epoxy resin and glass
Composite forward beam with striker

Sails and rigging:

Fractional sloop rig
Fully battened main
Fixed or rotating mast
Roller furling genoa
Asymmetric spinnaker flown from the bowsprit

Sails and rigging images:

Deck layout and gear:

Flat decks with non-slip surface
Targa bar carries solar panels and aerials, and lifts and carries a dinghy
Wheel steering, with several options for helm position
Main sheet traveller track on the cockpit seatback
Hardtop bimini
Walk through to transoms or standard cockpit layout with wrap-around seating

Deck layout images:

Keels, boards and rudders:

Kick-up rudders mounted in the bottom step of the transoms
Daggerboards - offset in the hulls to give more accommodation space

Accommodation:: Port hull: Head and shower aft; navigation area midships; double berth forward; optional en-suite head in the bow
Bridgedeck cabin: Saloon with 360 degree view; dinette; windows open on to the cockpit for ventilation
Starboard hull: Double cabin aft; galley midships; double berth forward; optional en-suite head in the bow There is also a galley up version.