The Naked Sailor

Data

14 posts

Going Slowly Upwind

Going Slowly Upwind

It has been a struggle to gather reliable speed data from our new/old Hanse 531. Mostly because of calibration problems, but partly also because of archaic instruments operating on should-be-obsolete data networks. To start somewhere, I put together some really preliminary stuff we recorded during our sail from Visby to Kalmar.

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Hanse 388 Motoring Speed

Hanse 388 Motoring Speed

Earlier in the spring, I had the pleasure of motoring through the magnificent Finnish Archipelago sea with absolutely no wind and very flat water. As I also had a freshly cleaned bottom, it was a great time to retest the motor cruising speeds of our Hanse 388!

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Light-Air Crossover Sailing

Light-Air Crossover Sailing

Less than a week now, until we will embark on our third summer sailing adventure! We still don’t know where we will go, but this post isn’t about that. This post is about a short solo trip I did last week. During that trip, for an hour or so, I got some good data for... Continue reading Light-Air Crossover Sailing

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Calibrating Speed

Calibrating Speed

The holy grail of sailboat performance comparison is to sort out how fast it goes when we know what the surrounding conditions— wind and water movement— are. It’s actually quite complicated, and I confess that I don’t have a final answer to this question, yet. This post is about one part of it, however, calibrating... Continue reading Calibrating Speed

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GPS Precision

GPS Precision

Our Hanse 388 has three different GPS devices. A couple of days ago, when I was sorting through the position data, I came across some interesting glitches.

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Calibrating Heading

Calibrating Heading

Last week, during my fun solo sail from Finland to Åland and back, I had some issues with engaging the autopilot. Regular commentator and Hanse 385 owner Stuart chimed in (thank you!), and suggested I should check the calibration. So I did!

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Hanse 388 Performance 2.0

Hanse 388 Performance 2.0

Last year I wrote a post summing up our first season sailing performance. Now, a couple of months into our second season, I think it’s clear that we’ve already found a better gear! In this post, I’ll share some data from a two-day solo sail I did this week.

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Wind Polars

Wind Polars

Sailboat polar diagrams usually tell us what the boatspeed will be, based on wind speed and angle. I thought it would be nice to flip it the other way: if we want to achieve at least, let’s say, three knots of boatspeed, what kind of wind will we need to achieve that?

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Hanse 388 Speed and Polars

Hanse 388 Speed and Polars

So, how fast does our Hanse 388 go? This summer, we gathered over twenty million data points to compare our sailing speeds with what HanseYachts’ marketing material had promised. Here are the results.

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A Digital Logbook

A Digital Logbook

Since I was about eight years old, one of my hobbies has been to code, to make computer programs. I love the creative process, and also the off chance of finding some new ways of piecing old puzzles together. This post is about my small sailing logbook coding project. EDIT (18.3.2021): This version of the... Continue reading A Digital Logbook

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A Community of Sailing Blogs

UPDATE: The sailing blog collection has been discontinued. It was a fun project, but without that many users, it became a bit expensive to run 😄 Thank you all who participated! ❤️ There’s a lot of people actively sailing (or dreaming about it as we do!) and at the same time publishing blogs and YouTube... Continue reading A Community of Sailing Blogs

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