The 100 to 135 torque servos have done the job for a long time for trim where the load is directly from the sheetline. The use of this category servo for the rudder increased dramatically a few years back when it was found they could control most attempts to broach on a run.
The Ozmun swing arm winch and the RMG drum designs have been trouble free and reliable when installed correctly. The RMG is constantly being upgraded as new technology and radios systems arrive. It is a professional quality unit for a very reasonable price.
Battery drain is not a problem to the degree it is not thought of. I have been using the Apak 1600ma 6v batteries since 2000 with a fast charger. I am still using some of the original ones. Point is though, that with all the changes that have come along in winch design and the use of higher torque servos, my time on one single pack for the whole system has not changed...that is one pack in the morning and one in the afternoon and another if sailing after 1600. I check a battery when it goes in and it is changed on time only, not when near depletion.
One would thing that digital servos would embody all it touts. It does and then beyond. Here is a disturbing story:
Two boats became intangled during a rules infraction (strange?). The jib trim servo with the jib sheetline passing through the long arm could not return to its instructed position and while trying, went into a high amperage dump that started wires and the sub C batteries smoking by the time it arrived at the shore. Fortunately, it did not catch fire. The loss was several hundred dollars and a smelly bilge.
What catch my eye in this topic is that competitive racing 3000 miles from home requires reliable equipment and proper deligence before an event. There is too much at stake and for my having fun. So, we share this with all on the building site. Part of having fun is that your playmates are also even if you grind your teeth a bit.
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