Alert
Latest updated Monday, February 5, 2024, 6 comments
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Plans, Alert - 125 EUR
Purchase
Alert is a latter-day successor to Rob Roy - the boat that became the father of all recreational small craft almost 150 years ago in England. The Rob Roys were short and chubby and were sailed as well as paddled. The followers are narrower, longer, faster and lighter – Fanny, Uppsalakanoten, Åland, Spröjt, Lisa, Anita – och Alert.
Alert is a good sea boat, well balanced and with good load capacity, but doesn't handle as nicely as modern kayaks in windy conditions.. The round-bottomed hull has less initial stability than the more modern kayaks which makes it a bit tippy unloaded but for coastal touring it is a worthwhile tradeoff. The movements in a choppy sea are easy and predictable and it takes no water on deck unless hard pressed.
Particulars
| Length¹ |
520/474 cm (overall/WL) |
| Beam |
60/52 cm (overall/WL) |
| Draft |
12 cm |
| Cockpit¹ |
89x45 cm |
| Height¹ |
29.5/29 cm (in front of/behind the cockpit) |
| Weight² |
18-23 kg |
| Displacement/volume⁶ |
135 kg/375 litre |
| Speed³ |
7.2/10.5 km/h |
| Prismatic coefficient |
0.56 |
| Wetted surface |
2.1 m² |
| Drag⁴ |
1.74/3.21 kp |
| Stability⁵ |
4/5 (initial/secondary stability) |
| Intended use |
Coastal and open sea touring. Lakes and rivers. Exercise and day tours. |
* These dimensions can be adapted to suit personal needs or wishes.
** Depending on type of wood, equipment, care with epoxy usage, sanding etc. etc.
*** The speed numbers are based on mathematical standard formulas (175 lb paddler + 30 lb carco weight) and corrected from the kayaks actual performance om trials, on tours and in races.
⁴ Calculated resistance in 4 and 5 knots (at nominal load capacity).
⁵ Initial stability and secondary stability on a subjective scale, where 1 is very tippy and 5 is very stable.
⁶ Displacement is kayak + paddler + load. Count off the kayak weight to get the load capacity.
Stability
The curve shows the calculated stability with a static load, and therefore of limited use for a real paddler. The part of the curve near zero degrees indicates the initial (primary) stability – the steeper the curve, the more stable. The part of the curve left of the peak indicates end (secondary) stability – the higher and wider, the safer you feel edging the kayak. The position of the peak shows also how much the kayak can be leaned without tipping over. The part of the curve to the right of the peak with rapidly decreasing righting moment is almost impossible to take advantage of.
Plans, Alert - 125 EUR
Purchase
Minimum window dimensions to get your kayak out from the workshop:
60x39 cm
