IOM Yachts


The  Ellipsis… IOM represents a different approach to what is now “conventional chine” boats,

The truth is chines do not do what designers say they do. They do not “grip” the water or generate lift, or  stop the boat going sideways in any way.

The main application of a chine on modern IOM’s is to easily allow a boat to have  tumble home aft by separating the topside shape from the bottom shape. This aft tumblehome In combination with much fuller bow sections, reduces the  “in out wedges” of a hull which stops the hull from trimming bow down when heeled. This hull “balance”, allows the hull when heeled to sail in a straight line rather than curve to windward and allows the foils to stay at an optimum angle of a attack without further skewing the hull. This makes the boat easier to sail and reduces drag. 

Other effects of the chine are the ability of a designer to make the stern sections flatter than they otherwise would be and gives the hull a volume bump just above the waterline increasing initial form stability and at the bow increasing  acceleration. The chine may also allow a cleaner separation of the water flow aft at speed, but this is debatable.

The Ellipsis… approach is to remove the chine completely but to retain the volume distribution and excellent hull balance of a chine boat. This produces a much simpler and easier to produce hull in both glass  and wood. The Ellipsis… is very well balanced upwind and can be trimmed to give a negative feel right though the useful range of heel angles. When running the Ellipsis’s  full bow gives the boat excellent nosediving prevention ability and exceptional acceleration in gusts.

The Ellipsis… being narrower on the waterline and has less WS Wetted Surface than many chine boats. The deck is slightly wider allowing a wider stay base and better rig control.

The deck has been designed for simplicity to allow a simple “glue in/on” deck which can also be fitted to wood Ellipsis hulls. The deck allows the jib foot to be very low in the boat.

The Ellipsis… is also unlike many chine boats, and very pretty boat.

The Ellipsis… is being produced initially in a basic kit, and in 2018 as assembled ready to rig boats.

Freight extra. plans are included, but if you have already purchased plans the cost of the plans will be discounted.

Individual parts are available on my COMPONENTS page.

Kits can be ordered but I sometimes do have Kits available.

A deposit is not required but full payment must be made before dispatch.

Your name will be placed on my order list, and you will be given an approximate date and contacted when available. The initial run of the above kits has now ended. Updated kits will be available from May 2018.

In 2018 assembled boats and occasionally fully assembled rigged boats will be available.  If interested please email or call me, to discuss, what is available now and to work out freight cost.

IOM Sails

Licensed Builders FRD Designs


MX Components:

IOM: MX14 ( Goth XP Varient)

Goth XPRG RG65



Updated: 18/1/18