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The TM45 is the result of a technical journey to build the best speed fin
available today. After many design iterations, some successful and some not, the
TM45 stands as testament to the hard work and thorough testing done by many of
the top speed sailors around the world.
The TM45 is a competition speed fin. It is designed to work in a wide variety
of conditions from tight courses to broad courses, flat water to surf, but all
the while providing the best possible
opportunity to reach 45 knots. Compromise has only been made where it will
increase the chance of reaching this goal.
Benefits
The key benefits of the TM45 are:
 | Careful attention to section and tip design to resist cavitation beyond 46
knots |
| Has a very deep drag bucket at operating speeds to reduce drag to a
minimum |
| Supports high load efficiently to run tight to the wind and handle the
forces from strong winds |
| Optimal rake for control at high speed and reducing flex |
| Very resistant to spinout so can safely be pushed harder in the chop |
| Maintains a drag bucket in a wide variety of conditions |
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The foil section of the TM45 is not a published design, but rather a
highly optimised design based loosely on the NACA algorithms. The foil
section is designed for a wide range of sailing conditions from smooth flat water
to surf conditions and strong winds. The optimum speed range is 40-45
knots where the foil section reaches its peak efficiency, but is designed to go
faster if the conditions are suitable.
To achieve speeds reaching and exceeding
45 knots, the foil sections and tip design have been optimised to delay cavitation,
with a theoretical cavitation inception speed of 46 knots at the
ideal angle of attack, or nearly 48 knots optimal. Of course, this is just
theory, and it is possibly capable of more depending on water
conditions.
To control the accuracy of the design, the TM45 is built using high
precision CNC machining, either by direct machining of the G10 or by CNC
machining of the mould. Through the use of computer design and CNC
machining, the TM45 is able to deliver in practice much of the potential
it displays in theory in Computational Fluid Dynamics (CFD) software. |
Riding this fin will be like a new experience for most sailors. The first
thing you will notice is how effortless the fin slices through the water. It
feels as though there is no resistance from the fin at all. However it also has
amazing lift and you can apply full load to the fin without losing that
efficiency. It feels like you cannot put too much load on it, allowing a more
comfortable stance and an opportunity to reduce the contact of the board on the
water. See the section on Why use an asymmetric fin
to understand why the TM45 can produce so much lift for such a small fin. The combination of higher
lift from the asymmetric design, and super low drag from the foil design and
smaller size make
the TM45 able to produce its extraordinary performance in a wide range of
conditions.
Specifications
| Design speed |
40-45 knots (74-84 kmh) |
| Length |
22 cm |
| Chord |
88 mm |
| Rake |
12 degrees |
| Section |
Time Machine custom Vario section |
| Optimal surface |
Fully polished |
| Material |
Unidirectional carbon and epoxy |
| Base |
Tuttle |
| Screws |
6mm |
| Direction |
Starboard tack |
| Current price (limited availability) |
250 Euro ($420 AUD) + shipping |
Buy now using PayPal or your credit card. You do not need a PayPal account to
pay using this method.
For more information on availability of the TM45 contact sales@intellimass.com.
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