|How foils work
deflect the water downards as the boat moves forward – the upper
also sucks the water down, both effects create lift, sufficient to lift
the entire boat clear of the water. Compared with a displacement and
planing surfaces, there is much less drag due to the greatly reduced
surface area and elimination of wave making resistance – the boat
can then easily go twice as fast as when pushing water with the hull!
cats and trimarans, which use 3 or 4 foils, we fly on just
foils which have less drag. A secret to dinghy foiling
efficiency is that the boat can be heeled to windward,
upwind, enabling the weight of both the hull and rig to provide
which helps keep the boat upright against the breeze. No other
type of sailing craft uses the weight of the entire hull to provide
moment. This means we can apply more power and go even faster, with
less drag than multihulls and even sailboards. You will experience
this yourself when you foil your dinghy past Hobie cats !!
* Our foils are different – no flap, low drag, always optimised.
* The wand which controls the foil ride height is integral
with the centreboard
foils can retract even while moving forward, enabling launch
retrieval in shallow water and quick release – we use
a standard kick up rudder system.
Top speed - We have have yet to find the
ultimate top speed, lets see
what you can
drag – despite first appearances, the low streamlined
profile of a dinghy has very low
wind resistance. At 20Kts nearly half the
is wind resistance, so this is very beneficial.
your foils Insert the centrecase insert and pin on the gear
block. Clip your foils together and connect the rudder. Don’t forget
the washer to hold it in place. Once in the water, tip the
boat on its
side and insert the centreboard foil. Always clip on the
retaining key before heading out.
launch and sail off the beach in the normal way. Lower the rudder and
hold it in place using the usual retaining cord. There are no other
special controls or attachments.
on the water, pull the centreboard back and lock it in to full lift
with the gear lever. You are now ready to lean to windward, sheet on
and bear away to take off.
you lift clear of the water, the apparent wind kicks in quickly. Bear
away hard and sheet in as the boat accelerates easily to 12-15 kts. Now
you are up and away. Experiment with steering and leaning before
heading up for a high speed reach and testing your upwind skill which
requires leaning hard and to windward!
Prepare yourself for an exciting ride and see what top speed