We’ve always assumed that the maximum rated load was usable for an extended period of time. We’ve kedged ourselves out of trouble, and ground in a lot of highly loaded sheets in heavy weather without problems. However, while doing our drogue testing last month, our Lewmar #66 winch cut out. This is a unit rated at 3000 pounds pull.<\/p>\n
Checking the circuit breaker showed this was fine, so we assumed there must be a thermal overload protector on the motor. A call to our local Lewmar guru, Bob Davidson, confirmed this. We assumed this could be removed and was more a CYA device than something which was required, and we asked Bob to double-check with the factory. He came back with a reply that we could remove it, but there was high risk of burning up the motor if we did.<\/p>\n
To be fair, we had both engines at slow ahead while we were grinding in lots of rode – to simulate real-world conditions where we’d be retrieving drogues in a moderating gale. We ended up dragging in the last drogue by hand, with Steve backing down to remove load, and two of our helpers doing the pulling. This was not a big deal given the help, but if it were just two of us, it would be a lot harder.<\/p>\n
What we are not sure of in this experience is how much impact there was from a build-up of heat from all the prior rode retrievals (something we would not see in the real world). To find out we are going to re-test drogue retrieval again.<\/p>\n
And when the time comes to use this winch to kedge us off a grounding, we’ll use it intermittently, to allow for some cooling.<\/p>\n
Otherwise, if you want to be certain of winch rating over long periods, hydraulic drives are the answer.<\/p>\n","protected":false},"excerpt":{"rendered":"