The power of multi-hull sailing
A-Class
MultiONE
The A also known as RA class (vane and radio respectively), started in 1922 by the Editor
of Yachting Monthly with the intent of being a scaled down version of the
International 6 metre class.
The rule has developed in to a class where penalties
on hull shape trade off speed enhancing factors against sail area and a minimum
specified weight mean that competitive boats have a very long life.
Boats can be built using fiberglass, kevlar, carbon fiber
and wood; the sails are made of dacron or mylar.
A modern A-Class is controlled by radio, capable of controlling practically every part of the boat.
A boat built in England averages 1.73 to 1.98 metres in length, has a waterline of 1.25 to 1.40 metres,
a sail area of about 0.97 square metres and weighs 22.5 to 34.0 kg.
The AMYA A Class boat is easy to sail and is very stable when properly trimmed.
Highlander: Length :
1990 mm
Designed by :B.H.Priest
Manufacturer : Bob Underwood
Sold by : Bob Underwood, 6 Winsley Road, Bradford on Avon, Wiltshire, BA15 1QR
A-class with a IOM class (windstar from ROBBE).
Mast of the A-class. 
From this early beginning, the International A Class Rule was adopted and actively sailed as part of
the Model Yacht Racing Association of America (MYRAA).
Unlike many of the classes in AMYA, the A Class rule has experienced
few changes over the years.
The boats designed to the rule are basically similar in appearance.
The rule allows the designer/builder to create a boat according to
the weather conditions in various parts of the world.
On the East Coast of the U.S.A., the boats are 1.73 to 1.83 metres in
length, waterlines are 1.14 to 1.22 metres, a sail area of 1.10 square
metres and displacement of 13.5 to 20 kg.
Their classic big yacht lines make these an aesthetically pleasing model to the onlooker.
Its size, weight and inertia resembles a full size boat which looks very elegant on the water.
Unfortunately the size and weight of these boats has reduced their popularity and the class is only
followed in a few dedicated countries.
Beam :
340 mm
Draft :
300 mm
Hight mast : 2390 mm
Displacement : 23000 gr
Sail area :
100 dm2
