Yeah they're pretty well tuned. I regularly check the log against the gps
and it usually make sense withe the expected currents, none, with us or against. The windspeed we re calibrated by dropping it 20% after comparing with 3 other boats and it seems good. Wind
angle not so good but the gps
track shows the state if things. I don't put any faith in the polars, it's best to sail and make your own to get a feel for what you can expect. Our boat is in full cruising trim so I'd expect better performance without all the gear
. I finally found the VMG setting on he Raymarine
instruments and have been playing around with that the last couple of sails
. I find the VMG to windward pretty useless as it fluctuates too much, relying on the data from the wind gear
. But placing a waypoint well to windward and setting it VMG to WP gives very good data, allowing us to maximise upwind performance. I find 17-25 AWS (12-20 TWS) a nice sweetspot for upwind sailing on the L400 with full sail.
I did put a (rather boring) vid on YouTube last week with a bit of performance data on it.