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TruSail: training analytics |
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 Topic: TruSail: training analyticsPosted: 07 Jan 19 at 4:39pm |
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Seems a very decent unit... more for sailing associations, pro-coaches and pro-sailors at the it's price-point.
A lot of the analytics will have been used in racing yachts for long time, with many being used right down to amateur weekend warriors (except sail loading?). But, these things are very hard to measure on a dinghy where you need a light weight and small unit. There's very little in the way on usable data for the average sailor. GPS overlay will give you rough speed and where you went, but no where near the resolution to give you decent feedback on a tuning run, which you'd have to do solely on perception. Nearest thing you can get is a action camera to review, but it's not analytical. Power-meters in cycling became a massive thing, even with non-racers over the last 5 years. Could you see the same thing happening with units like these? For heel, sheeting angles, tiller angle, leech loading and 1/10th second resolution GPS positional data I'd probably pay 500-1000£. My valuation is probably an order of magnitude off affording this system for now  How much would you pay? Edited by mozzy - 07 Jan 19 at 4:45pm |
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Posted: 07 Jan 19 at 4:59pm |
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I made a system about 5 years ago for a work application but used it for sailing too. Could log locally and also Bluetooth to a coach boat pitch, roll and heading and GPS location and speed. Was really interesting to analyse the data. Based on one of these (about £300) plus a GPS unit. these AHRS
Adding in tiller angles, boom angles and leech tensions would be really great, but a pain to set up I expect. |
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Posted: 07 Jan 19 at 7:01pm |
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I just wish I had the smarts to put such a system together!
I think heel is the number one thing Id like to get. You can get it with RaceQs app, but the GPS is rubbish on my phone, so the track doesn't end up that use able. Plus, for training I'd like a display on board, that you could see. Next I'd like tiller angle. Then all the GPS fine detail speed and acceleration. I think the last priority would be sheet angles and leech tension.
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Posted: 07 Jan 19 at 7:30pm |
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Heel and pitch (trim) are relatively easy, just a calibrated IMU. Tiller angle needs a magnetometer on the tiller and one on the boat, and synchronising between them. So more cost and hassle, but would be cool to see results.
See for examplethis video (how do you post YouTube vids here?) |
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davidyacht
Really should get out more 
Joined: 29 Mar 05 Online Status: Offline Posts: 1345 |
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Posted: 07 Jan 19 at 8:04pm |
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Would love a simple training device that pinged at you when you heel more than a given range from upright
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Happily living in the past
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Sam.Spoons
Really should get out more
Joined: 07 Mar 12 Location: Manchester UK Online Status: Offline Posts: 3400 |
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Posted: 07 Jan 19 at 8:41pm |
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a pendulum inclinometer and a couple of magnetic reed switches would do that
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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish" |
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giraffe
Posting king 
Joined: 10 May 07 Online Status: Offline Posts: 148 |
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Posted: 07 Jan 19 at 9:28pm |
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Epoxy a tube with a marble inside it to the thwart. And then keep the marble in the middle...
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423zero
Really should get out more
Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3420 |
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Posted: 07 Jan 19 at 9:55pm |
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I use a caravan level
 Edited by 423zero - 07 Jan 19 at 9:56pm |
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davidyacht
Really should get out more
Joined: 29 Mar 05 Online Status: Offline Posts: 1345 |
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Posted: 07 Jan 19 at 10:16pm |
Sounds like a good idea, if I had the skills. I have used a Silva inclinometer for practicing (not allowed for racing in a Solo), but I like the idea of a training device that makes a noise if outside a given range, so that I can concentrate on sail trim and sitting out. When racing I check the puddle of water by the center board case. In forty years I have been pretty hopeless at sailing upright.
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Happily living in the past
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Posted: 07 Jan 19 at 10:26pm |
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Car battery, inclinator attached to reed switch... a couple of wires up the tiller extension... you'd soon learn to sail her flat!
I love the 'steampunk' solutions though, it's very dingy sailing! I think what this does is allow you to compare real time to a boat next to you in the turning run and record data for later analysis. Plus, a big display is a must.
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