How accurate is Knotstick?
We use 316 stainless wire for the spring. Each spring is set individually to within 0.2 knots.
How do I change the scales?
Trolling kit includes a new tow line, trolling unit and all disks.
|To change scales you need only place the desired disk on the trolling unit. There are three options. The 0-3 knot scale is mostly for measuring currents. The 0-9 knot scale has the advantage of being reasonably weedless. The 0-6 knot scale gives greater resolution for most conditions.|
Will the calibration need adjustment?
The calibration is totally permanent. We have tested knotstick in a number of ways. One test involved tying a unit off at full scale and letting it sit for several months. The result was that the spring did not change at all. The calibration was not affected. The spring in the Knotstick is so far over designed that no amount of use will ever change the calibration.
production stainless steel spring
Where should I mount Knotstick for use?
The best location is tied to a safety stantion on either side opposite the point where the helmsman sits. This allows a good view of the instrument without turning around. It also allows the trolling unit to get an undisturbed flow of water. Since the trolling unit is fairly close to the boat, mounting on the exact stern is a problem and should be avoided. For center cockpit boats, the unit will be somewhat behind the helmsman.
|Green: Best mount
Yellow: Mostly ok(test it out )
How steady is the reading?
This is one of the best features of Knotstick. You get a steady reading. There is no guessing. When you look at the read head it shows only sustained speed changes. Random noise is completely blocked. The key is in the line connecting the trolling unit to the read head. This line is a carefully designed elastomeric cord. It is constructed of neoprene rubber with a dacron braided cover. The time it takes for the noise event to propagate through the tow line is much greater than the event's duration. This means that Knotstick will not show variations due to the random movement of the stern.
What size boat can use Knotstick?
Knotstick has been used successfully on boats ranging from 12 foot sailing dingies to 60 foot racers. Knotstick is the only knotmeter that works well on a 12 footer. You can tie it to the end of the boom and improve small boat racing skills. Larger racing yachts carry Knostick as a backup to more expensive electronic meters which can foul.
How durable is Knotstick in real service?
Knotstick has been in production since 1978. We often get letters from owners that have used Knostick for years. This product is durable. The trolling unit is the only replacement part. The trolling unit should be replaced every two years.
Can I get replacement parts?
Yes. We have imediate shipping for extra trolling units. See the order page for details.