Welcome to the catamaran design website of Derek Kelsall.

With over 40 years of specialising in Catamarans and composites, and developing the KSS (Kelsall Swiftbuild Sandwich) custom build process for professional and home boat builders, Kelsall Catamarans is the world leader in this field.
Build with KSS and achieve an

Efficient
Practical
Logical
Stylish
No compromise

BUILD SOLUTION

Design Plans

Arrangements

Resin Infusion

Frames for
Half Hull

Shaping and
Lamination

Modular
Assembly
2009 marks a milesone for Kelsall Catamarans. It was 45 years ago that Derek Kelsall completed the Trans Atlantic race in the first non-ballasted multihull. The 2009 race has just been won by a monohull for the first time in some years.

Latest News, Update and Plan Price Offer

KSS explained for boat builders in NEW booklet

More Pictures of Interest

KSS 46 Gillaroo in the Galapagas Islands. We like the seal on the step.


NEWLY Launched, first of three, KSS 58's built by Ballotta, Peru


Pictures of the KSS 58 by Ballotta Boats, Peru

Pictures of the latest KSS46 Catamarans built by Ballotta Boats, Peru.

 Visit Ballotta Boats   www.cata-ballotta.com

KSS 82 Bonefish Goes Alfoat, Tauranga, NZ

KSS 82 Design and Pictures


Aluminium - 43 footer - from GHI, Korea


Pictures of first of two Aluminium build

KSS 39 by Ballotta Boats, launched Christmas 2008

For more information on KSS 39

New Design KSS 42 Kitiwake
Designed for modular construction/assembly


New Design KSS P46 JP
Designed for modular construction/assembly

See the Kiss Kat range.
For a trailer sail catamaran that is simpler, better and more convenient.
www.kelsall.com/kisskat

See our independent KSS contacts around the world

Join the KSS Boat Group

Derek Kelsall's blog is derekkelsall.blogspot.com