For beams of the bridge in this option, you will need the dural tube 150×2 mm. the Volume of the floats — about 100 L. For this purpose in each of the fairings has consistently laid three “logs” with a volume of 40 L. the Valve medium “logs” is closed up tightly, and pumped it through the new, glued on the cylindrical surface of the glue “Viniks”. In the fairing for it cut a hole.
This trimaran can go and pyatidesyatimetrovy floats, however, it should be noted that even in medium wind they are deeply buried in the water.
Note: if the float is systematically included in the water more than half, you should immediately reduce thrust by reducing the angle of attack of the sail and its “belly”.
Fig. 8. The sail area of 4.5 m2 with mast pocket:
1—bapty, 2 — forestay, a 3 — masted pocket, 4 — sail 5 — twin boom-wishbone, 6 — middle part of the boom, 7 — sheet block-ring, 8 — grommet Shkotovo angle, 9 — sheet, 10 — strip grosgrain ribbon, 11 — lanyard of the tack angle, 12 — pole 13 — cross-beam, 14 — wire, 15 — detachable parts wishbone, 16 — middle parts of wishbones, 17 — wishbone front arc, 18 — rivet, 19 — ambulante.
For tri fit any of the above sails. The point of fixing the guys at 1700 mm below the top of the mast.
5 last time starting to be popular following the method of tensioning the canvas: alcovy flowy and angle are fixed, and the grommet sheet corner is drawn to the NOCs geeks soft lanyard. This allows you to quickly reconfigure the sail, reduces the time to install it and disarmament.
On “the Swift-7” shortback located at a distance of 400-450 mm from the mast. Alignment of selected front to facilitate turning the tack. The wheel in this case is negligible because it is sufficiently removed from the center of lateral resistance.
Additional parts for increasing reservoir quality-made three-dimensional, asymmetrical profile. Note that, as a rule, is always one swiercz, located on the Lee Board to the convex side of the kayak.
Each of svircev going from two duralumin sheets placed between them a tube or a Board that specifies a profile. You can bend and additional parts from a single sheet or even planed out of the Board. The last option, by the way, gives the best results. We just need to protect the wood with epoxy or varnish parquet water and Polish to obtain a glossy surface.
The relative thickness shvartza — 10%. His profile can be simplified: one side flat, the other formed by circular arcs. Swerte on Sharp edges should be rounded.
Tests have shown that throughout the range of operating speeds and angles of attack have additional parts, the laminar nature of the flow. Separate streams of disrupted flow was caused by a small Burr, not seen in the preliminary examination of the samples. Additional parts of other configurations of such a flow is not allowed.
Empirically established that the initial angle of attack saurav should not be more than 5°, otherwise due to their high hydrodynamic quality swiercz makes a tri-skid on the wind and the speed drops dramatically.
In conclusion, it should be noted that the three “Swifts” does not exhaust all the possibilities of kayak trimaran. Fans are constantly experimenting, seeking light and unpretentious sailboats greater strength, increase aerodynamic efficiency of the sail, facilitate the management of them in conditions of gusty winds and heavy swells. Designed bridges and other structures, although the power scheme “Swifts” — the same two beams and bifurcated guys, apparently, will remain the most appropriate for coastal navigation.