There are several multihull classes, one
of the most popular multihull classes is the Mini40 class or F48
with 48inch maximum lenght and 48 inch maximum beam . Other classes are the
2m class, the new MultiOne 1metre class and the very new
65M
multihull class. The 65M is a very exciting class with well sailing,
small and easy to transport multihulls.

The Mini40 Class
The first recorded activity of racing multihulled model
yachts in the UK stretches back to the late 1970's. A few modellers designed and
raced their boats for a number of years, with vane steering guiding the boats as
they thundered up and down the lake, often on the edge of control.
The vane steered boats never really caught on nationally, possibly because of
the difficulty of keeping up with the things when running along the lakeside!
Despite the appearance of the odd design here and there, notably the Birkenhead
one design catamaran, the idea of racing model multihulls didn't take off.
It was not until the early 80's that the idea was resurrected by a group of
French sailors. By this time, the advent of good quality radio control gear,
and the increasing sophistication of construction materials meant that model
multihulls could be made exciting and controllable!
The first class introduced was the 2m, which are still sailed today. These
monstrous machines, with an unrestricted sail plan on a 2.8m high mast proved to
be powerful, fast, but not for the faint hearted: there was a need for something
not quite so massive, and also less costly. The French skippers formulated a
new smaller class, called the CT. The new boats were around 1.5m in length,
but suffered from a complicated rating rule similar to that used by the 10r
class. This, along with the fact that they were not really that much smaller
than the 2m class, led to their demise.
By the mid 80's, a group of skippers around Paris formulated a class, loosely
based on a scaled down version of the then popular full size Formula 40 boats.
This development (at 1/10 scale of 40ft) produced the Mini40 class, which since
it's introduction, has gone from strength to strength, and is currently sailed
in 8 countries worldwide. The boats were introduced to the UK at the end of
the 1980's, and with the help and sheer dogged persistence of a band of stalwart
supporters, have become the backbone of the UK multi activity.
The Association was formed in 1990 to coordinate the activities, and opted to
promote the Mini40 class as the main class for racing in the UK. The technical
control of the class lies with the Federation Francaise de Voile (FFV), who work
very closely with the BMMA to ensure that the development of the boats is guided
by the will of the members.
mini40
rules
The 65M Class
In
2008 some multihullers on various bulletin boards discussed building RG65 sized
multihulls. The first boat sailing well and sized around this 65cm was designed
by german sailor Peter Gernert. The guys at rcsailing.net founded the 65M
with no other rules than overall lenght not exceeding 650mm. First
designs came up in 2009 by Phanchita Supasirithanawat, who let Ernst Zemann an
Multihull designer draw two different boats and Dick Lemke who started a
Trimaran and a Catamaran.
The 65Ms sail well, are easy to be transported and inexpensive compared
to larger multihulls. New boats can be registered
here, selfbuilding plans can be downloaded
on this site for free.