He did have a small incident yesterday afternoon… For no apparent reason, the stabilizers suddenly failed. With a 8-10 foot beam sea, this was NOT fun. He couldn’t figure what was happening, and called both Nordhavn and ABT (the makers of the stabilizers). We were on a bad sat phone connection, so I’m not 100% certain I understood what he was saying about the problem .. but, my understanding is this:
There are sensors on the shafts that tell the brain for the stabilizers what the engine rpms are. I’ve had problems with the shaft sensor failing intermittently. My guess is that the stabilizers thought one or both shafts had stopped turning. ABT had Jeff put the stabilizers into “manual mode” and suddenly the stabilizers worked fine. So .. after a couple of hours of being tossed around, all was fine again.
On a completely different topic…
I’ve been discussing props with another Nordhavn owner, and how prop pitch relates to efficiency. The other Nordhavn owner asked how “load percentages” I was seeing.
I must confess that I don’t at all understand the load percentage numbers. The engine murphy gauges show the load percentage, but I’ve never known how to interpret it. I asked Jeff what the engine load was, and he said 40%. Does this mean we are wasting 60% of the power being passed to the props? If someone reading the blog understands this topic… explain it to me below…